Abstract: A one-step method and compositions for stabilization of heavy metals, acid gas removal and pH control in hazardous and toxic solid, semi-solid, liquid and/or gaseous matrices using a mixture of reactive agents in a single product, for the broader purpose of enhancing environmental pollution control, prevention and remediation are described. The product contains sulfonated calcium aluminum magnesium phosphate. This material may be used alone or in combination with magnesium sulfite and/or hydroboracite.

Abstract: The present invention provides a glass composition for hermetically sealing to high thermal expansion materials such as aluminum alloys, stainless steels, and copper alloys, which includes between about 10 and about 25 mole percent Na.sub.2 O, between about 10 and about 25 mole percent K.sub.2 O, between about 4 and about 15 mole percent Al.sub.2 O.sub.3, between about 35 and about 50 mole percent P.sub.2 O.sub.5, B.sub.2 O.sub.3 in a concentration not exceeding 10 mole percent, and MXO in a concentration not exceeding 12 mole percent, wherein MXO is a metal oxide selected from the group consisting of PbO, BaO, CaO and MgO or a mixture thereof. This composition is suitable to hermetically seal to components for use in RF-interconnection applications.

Abstract: A glaze composition suitable for a thin chip substrate, for example. The glaze composition makes a low-temperature glazing possible and is superior in the electrical and chemical stability. The glaze composition can prevent even a thin substrate from warping and can easily form an extensive smooth glaze layer without deteriorating a thin glaze face. The components of the composition are 20% to 50% by weight of boron oxide, 5% to 35% by weight of aluminum oxide, and 15% to 55% by weight of at least one alkaline-earth oxide selected from the group consisting of calcium oxide, strontium oxide, magnesium oxide and barium oxide.

Abstract: Lead-free phosphate glass compositions are provided which can be used to immobilize low level and/or high level radioactive wastes in monolithic waste forms. The glass composition may also be used without waste contained therein. Lead-free phosphate glass compositions prepared at about 900.degree. C. include mixtures from about 1 mole % to about 6 mole %.iron (III) oxide, from about 1 mole % to about 6 mole % aluminum oxide, from about 15 mole % to about 20 mole % sodium oxide or potassium oxide, and from about 30 mole % to about 60 mole % phosphate. The invention also provides phosphate, lead-free glass ceramic glass compositions which are prepared from about 400.degree. C. to about 450.degree. C. and which includes from about 3 mole % to about 6 mole % sodium oxide, from about 20 mole % to about 50 mole % tin oxide, from about 30 mole % to about 70 mole % phosphate, from about 3 mole % to about 6 mole % aluminum oxide, from about 3 mole % to about 8 mole % silicon oxide, from about 0.

Abstract: Lead-free phosphate glass compositions are provided which can be used to immobilize low level and/or high level radioactive wastes in monolithic waste forms. The glass composition may also be used without waste contained therein. Lead-free phosphate glass compositions prepared at about 900.degree. C. include mixtures from about 1 mole % to about 6 mole % iron (III) oxide, from about 1 mole % to about 6 mole % aluminum oxide, from about 15 mole % to about 20 mole % sodium oxide or potassium oxide, and from about 30 mole % to about 60 mole % phosphate. The invention also provides phosphate, lead-free glass ceramic glass compositions which are prepared from about 400.degree. C. to about 450.degree. C. and which includes from about 3 mole % to about 6 mole % sodium oxide, from about 20 mole % to about 50 mole % tin oxide, from about 30 mole % to about 70 mole % phosphate, from about 3 mole % to about 6 mole % aluminum oxide, from about 3 mole % to about 8 mole % silicon oxide, from about 0.

Abstract: The present invention relates to an optical glass material which can be molded by using metal mold having relatively low price by virtue of lowered glass molding temperature, have improved stick resistance between the mold and the glass material, and thus be able to lengthen the lifespan of the mold used.According to the present invention, is provided an optical glass composition for precise press molding, which comprises 73.9-81.5% of P.sub.2 O.sub.5, 6.7-8.3% of ZnO, 1.3-7.3% of BaO, 0.9-2.9% of SrO.sub.2, 0.8-1.1% of MgO, 4.9-6.1% of Li.sub.2 O, 1.1-1.4% of K.sub.2 O, 0.4-1.5% of Al.sub.2 O.sub.3 and 0.2-0.3% of Sb.sub.2 O.sub.3, of which the contents are based on oxides calculated from the batch.

Abstract: According to the present invention, there is provided a fluorophosphate fluorescent glass, capable of converting invisible ultraviolet rays into visually observable visible rays with a high efficiency and available for controlling the optical axis of a laser beam such as excimer laser, etc. The feature of this fluorescent glass consists in a fluorophosphate fluorescent glass capable of exhibiting fluorescence in the visible region, having a chemical composition comprising, at least, (I) phosphorus (P), oxygen (O) and fluorine (F), as glass constituting components, and (II) at least one member selected from the group consisting of divalent europium, terbium, samarium and manganese, as a fluorescent agent, the divalent europium being contained as an essential component and at least one of samarium and manganese being contained as an essential component when terbium is contained.

Abstract: The invention relates to a copper(II) oxide-containing aluminophosphate glass having good chemical resistance, very good devitrification stability, high transmission at wavelengths in the range from 350 to 550 nm and a refractive index n.sub.d of from 1.52 to 1.54. The glass has the following composition (in % by weight, based on oxide): Al.sub.2 O.sub.3 4-9; P.sub.2 O.sub.5 67-75; BaO 0.5-6; CaO 0.1-1; MgO 0-4; SrO 0-1; ZnO 0.2-1; .SIGMA.BaO+CaO+MgO+SrO+ZnO 3.5-7; Na.sub.2 O 1.5-5; K.sub.2 O 2.5-3.5; Li.sub.2 O 0.5-5; .SIGMA.Na.sub.2 O+K.sub.2 O+Li.sub.2 O 5-13; SiO.sub.2 0-1; B.sub.2 O.sub.3 1-2.5; AS.sub.2 O.sub.3 0.1-0.5; Cl.sup.- 0-0.3; F.sup.- O-1.3; CeO.sub.2 0.2-0.4; CuO 1-6; with K.sub.G =.SIGMA.Al.sub.2 O.sub.3 +SiO.sub.2 +CeO.sub.2 /.SIGMA.P.sub.2 O.sub.5 +B.sub.2 O.sub.3 0.06-0.125.

Abstract: A method for the manufacture of phosphate glass comprising forming an aqueous slurry by mixing phosphoric acid, a zinc compound and other batch materials in the required proportions, heating the batch slurry to produce a molten phosphate glass that exhibits a P.sub.2 O.sub.5 /ZnO weight ratio range between about 1.2 to 2.0, and cooling the molten phosphate glass to room temperature.

Abstract: There are provided glass-ceramics having a high lithium ion conductivity which include in mol %______________________________________ P.sub.2 O.sub.5 38-40% TiO.sub.2 25-45% M.sub.2 O.sub.3 (where M is Al or Ga) 5-15% Li.sub.2 O 10-20% ______________________________________and contain Li.sub.1+X (Al, Ga).sub.X Ti.sub.2-X (PO.sub.4).sub.3 (where X is 0 to 0.8) as a main crystal phases. There are also provided glass-ceramics having a high lithium ion conductivity which include in mol % ______________________________________ P.sub.2 O.sub.5 26-40% SiO.sub.2 0.5-12% TiO.sub.2 30-45% M.sub.2 O.sub.3 (where M is Al or Ga) 5-10% Li.sub.2 O 10-18% ______________________________________and contain Li.sub.1+X+Y M.sub.X Ti.sub.2-X Si.sub.Y P.sub.3-Y O.sub.12 (where 0<X.ltoreq.0.4 and 0<Y.ltoreq.0.6) as a main crystal phase.

Abstract: A near infrared absorption filter glass containing______________________________________ P.sub.2 O.sub.5 35.about.50% Li.sub.2 O 0.about.5% Na.sub.2 O 0.about.12% K.sub.2 O 0.about.20% Cs.sub.2 O 0.about.20% R.sub.2 O (in which R is an alkali metal) 1.5.about.20% ZnO 17.about.48% MgO 0.about.7% CaO 0.about.7% SrO 0.about.7% BaO 0.about.12% R'O (in which R' is an alkaline earth metal) 0.about.15% CuO 0.2.about.12% ______________________________________ in which % stands for % by weighthas excellent transmittance characteristics in the ultraviolet region over conventional phosphate-based glass, has glass stability and processability which enable the mass production, and further has sufficient weatherability.

Abstract: An optical glass having optical constants of a refractive index (Nd) from 1.50 to 1.60 and an Abbe number (.nu.d) ranging from 62 to 73, a transformation temperature (Tg) of 550.degree. C. or below, and barely cracks or sticks to metal molds when the glass is subjected to mold pressing, maintains excellent chemical durability, and having softening capability at a low temperature which can be obtained by restricting the composition of the glass in weight percents within a specific range of a SiO.sub.2 --Al.sub.2 O.sub.3 --P.sub.2 O.sub.5 --R.sub.2 O system.

Abstract: The subject invention is directed at glasses wherein either a portion of the ZnO or alkali metals, or both, is replaced by Cu.sub.2 O, i.e., monovalent copper. Specifically, the present invention is directed at a glass consisting essentially of, expressed in terms of mole percent on the oxide basis, 28-42% P.sub.2 O.sub.5, 15-30% Cu.sub.2 O, 10-30% R.sub.2 O, wherein R.sub.2 O is selected from the group consisting of 0-15% Li.sub.2 O, 0-20% Na.sub.2 O, and 0-10% K.sub.2 O, and up to a total of 45% of optional ingredients in the indicated proportions selected from the group consisting of 0-10% Al.sub.2 O.sub.3, 0-15% MgO, 0-20% CaO, 0-20% SrO, 0-20% BaO, 0-25% MgO+CaO+SrO+BaO, 0-35% ZnO, 0-10% MnO, 0-2% CeO.sub.2, 0-2% Ln.sub.2 O.sub.3, 0-10 Al.sub.2 O.sub.3 0-10% B.sub.2 O.sub.3, 0-10 Fe.sub.2 O.sub.3 0-10% Al.sub.2 O.sub.3 +B.sub.2 O.sub.3 +Fe.sub.2 O.sub.3, 0-7% MoO.sub.3 0-7% WO.sub.3 0-7% MoO.sub.3 +WO.sub.3, and 0-8% F, the latter as analyzed in weight percent.

Abstract: The subject invention is directed at wherein either a portion of the ZnO or alkali metals, or both, found in prior art glasses, is replaced by Cu.sub.2 O, i.e., cuprous or monovalent copper. In addition to the Cu.sub.2 O substitution, the inventive glass contains a required metal oxide constituent which is necessary to enhance durability. More specifically, the present invention discloses a glass consisting essentially of, expressed in terms of mole percent on the oxide basis, of about 42-54% P.sub.2 O.sub.5, 10-30% Cu.sub.2 O, 10-30% R.sub. O and 3-12% of a component selected from the group consisting of 0-7% MoO.sub.3, 0-10 Fe.sub.2 O.sub.3, 0-10% Al.sub.2 O.sub.3 and 0-7%WO.sub.3. In addition, the composition includes up to a total of 45% of optional ingredients in the indicated proportions selected from the group consisting of 0-15% MgO, 0-20% CaO, 0-20% SrO, 0-20% BaO, 0-25% MgO+CaO+SrO+BaO, 0-35% ZnO, 0-10% MnO, 0-2% CeO.sub.2, 0-10% B.sub.2 O.sub.3, 0-2% Ln.sub.2 O.sub.

Abstract: In a high energy laser system utilizing phosphate laser glass components to mplify the laser beam, the laser system requires a generated laser beam having an emission bandwidth of less than 26 nm and the laser glass components consist essentially of (on an oxide composition basis):______________________________________ Mole % ______________________________________ P.sub.2 O.sub.5 50-75 Al.sub.2 O.sub.3 >0-10 K.sub.2 O >0-30 MgO 0-30 CaO 0-30 Li.sub.2 O 0-20 Na.sub.2 O 0-20 Rb.sub.2 O 0-20 Cs.sub.2 O 0-20 BeO 0-20 SrO 0-20 BaO 0-20 ZnO 0-20 PbO 0-20 B.sub.2 O.sub.3 0-10 Y.sub.2 O.sub.3 0-10 La.sub.2 O.sub.3 0-8 Ln.sub.2 O.sub.3 0.01-8 ______________________________________whereinthe sum of MgO and CaO is >0-30;the sum of Li.sub.2 O, Na.sub.2 O, Rb.sub.2 O, and Cs.sub.2 O is 0-20;the sum of BeO, SrO, BaO, ZnO, and PbO is 0-20;the sum of B.sub.2 O.sub.3 and Y.sub.2 O.sub.3 is 0-10; andLn.sub.2 O.sub.3 represents the sum of the oxides of active lasing lanthanides of atomic number 58-71.

Abstract: A laser waveguide medium is provided comprising:a laser glass substrate wherein the substrate is a glass comprising (on an oxide composition basis):______________________________________ Mole % ______________________________________ P.sub.2 O.sub.5 50-70 Al.sub.2 O.sub.3 4-13 Na.sub.2 O 10-35 La.sub.2 O.sub.3 0-6 Ln.sub.2 O.sub.3 >0-6 R'O 0-20 R.sub.2 O 0-18 ______________________________________wherein Ln.sub.2 O.sub.3 is the sum of the oxides of active lasing lanthanides of atomic numbers 58-71, R'O is the sum of oxides of Mg, Ca, Cr, Ba, Zn and Pb, and R.sub.2 O is the sum of oxides of Li, K, Rb and Cs; anda waveguide region embedded in the substrate, the waveguide region having a higher refractive index than the substrate and the waveguide region having an inlet region through which light can enter and an outlet region through which light can exit.

Abstract: There is disclosed an amorphous, polymeric material that contains phosphorous, aluminum and carbon atoms, and that is the reaction product of a buffered liquid mixture of a source of phosphorous, such as 85% phosphoric acid, a source of aluminum, such as boehmite, and an organic liquid buffer, such as a carboxylic acid. The polymeric material may be converted to a glassy or crystalline solid by heating to a temperature of at least 150.degree. C., and may be cellulated.

Abstract: The instant invention describes a method for preparing a stable, anhydrous non-hygroscopic zinc phosphate compound which is suitable for use as a batch material in the preparation of zinc-phosphate glasses. This method comprises three basic steps: first, forming an aqueous slurry mixture by intimately mixing a mixture containing phosphoric acid and a zinc-containing compound whereby the so-formed slurry mixture is comprised of a mixture of zinc hydrogen phosphates and exhibits a P.sub.2 O.sub.5 /ZnO weight ratio range between about 1.2 to 2.0; second, heating the so-formed slurry mixture to a temperature and for a time sufficient to achieve both a removal of a sufficient amount of water and the phase transformation of the zinc hydrogen phosphates resulting in zinc-phosphate material comprised of granular solid mixture of zinc metaphosphates and zinc pyrophosphate and third, cooling the zinc-phosphate material to room temperature.

Abstract: A Faraday rotator glass composition based on a fluoride glass, phosphate glass, fluorophosphate glass or a mixture thereof is doped with a lanthanide in a concentration sufficient to provide a Verdet constant above at least 2870 deg/Tesla-meter [(1 min/cm-Oe).times.(1.667.times.10.sup.4)=1 deg/Tesla-meter] and optical transmission above at least 50 percent in a 25 mm thick polished glass sample at least at one wavelength in the 200 to 400 nm wavelength region. The Faraday rotator glass also includes monovalent non-lanthanide cations such as Na, Li, K or mixtures thereof in a concentration sufficient to provide a Verdet constant above at least 2870 deg/Tesla-meter and optical transmission above at least 50 percent in a 25 mm thick polished glass sample at least at one wavelength in the 200 to 400 nm wavelength region.

Abstract: A glass consisting essentially of (on an oxide composition basis):______________________________________ Mole % ______________________________________ P.sub.2 O.sub.5 50-70 Al.sub.2 O.sub.3 4-13 Na.sub.2 O 10-35 La.sub.2 O.sub.3 0-6 Ln.sub.2 O.sub.3 >0-6 Sum R'O 0-20 (R' = Mg, Ca, Sr, Ba, Zn and Pb) Sum R.sub.2 O 0-18 (R = Li, K, Rb, Cs) ______________________________________wherein Ln.sub.2 O.sub.3 represents the sum of the oxides of active lasing lanthanides of atomic number 58-71.

Abstract: This invention relates to a fiberizable glass compositions consisting essentially, expressed in terms of mole percent on the oxide basis, of at least 65% total of 5-55% ZnO, 28-40% P.sub.2 O.sub.5, 0.3-5% MoO.sub.3 and 10-35% R.sub.2 O, wherein R.sub.2 O consists of at least two alkali metal oxides in the indicated proportions selected from the group consisting of 0-25% Li.sub.2 O, 0-25% Na.sub.2 O, and 0-25% K.sub.2 O, and up to 35% total of optional ingredients in the indicated proportions selected from the group consisting of 0-10% Al.sub.2 O.sub.3, 0-15% B.sub.2 O.sub.3, 0-15% Al.sub.2 O.sub.3 +B.sub.2 O.sub.3, 0-15% Cu.sub.2 O, 0-25% Sb.sub.2 O.sub.3 0-5% F, 0-35% PbO, 0-35% SnO, 0-35% PbO+SnO, 0-5% ZrO.sub.2, 0-4% SiO.sub.2, 0-20% MgO+CaO+SrO+BaO+MnO, 0-20% MgO, 0-20% CaO, 0-20% SrO, 0-20% BaO and 0-10% MnO, and 0-5% rare earth metal oxide.

Abstract: An unsintered metal fiber burner is produced by mixing ceramic fibers with the metal fibers and binding the mixed metal-ceramic fibers together as a porous layer adherent to a foraminous support. By mixing ceramic fibers with metal fibers, the cost of a sintered metal fiber burner is reduced while the novel burner, because of the metal fiber therein, exhibits improved properties such as greater radiant efficiency, lower NO.sub.x emissions and increased durability.

Abstract: Phosphate glass compositions which exhibit both athermal behavior under high thermal loading and high thermal shock resistance without special conditioning. High gain, laser rods, discs and other optical elements formed of these phosphate glass compositions are also described.

Abstract: This invention is directed to the production of glasses exhibiting transition temperatures below 375.degree. C., preferably below 350.degree. C., and superior resistance to attack by boiling water. The glasses contain at least 10% copper, as expressed in terms of CuO, the predominant proportion of the copper being present in the Cu.sup.+2 oxidation state. The glasses consist essentially, in mole percent, of______________________________________ Li.sub.2 O 0-15 MgO 0-15 B.sub.2 O.sub.3 0-5 Na.sub.2 O 0-20 CaO 0-20 ZnO 0-37 K.sub.2 O 0-10 SrO 0-20 Sb.sub.2 O.sub.3 0-36 Tl.sub.2 O 0-15 BaO 0-20 CeO.sub.2 0-3 Li.sub.2 O + Na.sub.2 O + 12-30 MgO + 0-25 MoO.sub.3 0-7 K.sub.2 O + Tl.sub.2 O CaO + SrO + BaO CuO 10-50 Al.sub.2 O.sub.3 + B.sub.2 O.sub.3 0-5 RE.sub.2 O.sub.3 0-2 P.sub.2 O.sub.5 28-36 Al.sub.2 O.sub.3 0-5 WO.sub.3 0-7 MnO 0-20 ______________________________________wherein at least two alkali metal oxides are present and up to 12% by weight fluoride may optionally be present.

Abstract: Lead-free, tin phosphate glasses contain 25-50 mole percent P.sub.2 O.sub.5, 30-70% SnO, 0-15% ZnO, the mole ratio of SnO:ZnO being greater than 5:1, and an effective amount up to 25% total of at least one oxide in the indicated proportion selected from the group consisting of up to 25% R.sub.2 O, wherein R.sub.2 O consists of 0-25% Li.sub.2 O, 0-25% Na.sub.2 O, and 0-25% K.sub.2 O, up to 20% B.sub.2 O.sub.3, up to 5% Al.sub.2 O.sub.3, up to 5% SiO.sub.2, and up to 5% WO.sub.3. The glasses are particularly useful as sealing glass frits in sealing material to join component parts in electrical and electronic devices. The sealing glass material may contain mill additions to reduce the effective coefficient of thermal expansion in a seal, as well as a strength reinforcing additive having a coefficient of thermal expansion preferably below 120.times.10.sup.-7 /.degree.C.

Abstract: A glass composition for hermetically sealing to high thermal expansion materials such as aluminum alloys, stainless steels, copper, and copper/beryllium alloys, which includes between about 10 and about 25 mole percent Na.sub.2 O, between about 10 and about 25 mole percent K.sub.2 O, between about 5 and about 15 mole percent Al.sub.2 O.sub.3, between about 35 and about 50 mole percent P.sub.2 O.sub.5 and between about 5 and about 15 mole percent of one of PbO, BaO, and mixtures thereof. The composition, which may also include between 0 and about 5 mole percent Fe.sub.2 O.sub.3 and between 0 and about 10 mole percent B.sub.2 O.sub.3, has a thermal expansion coefficient in a range of between about 160 and 210.times.10-7/.degree.C. and a dissolution rate in a range of between about 2.times.10.sup.- 7 and 2.times.10.sup.-9 g/cm.sup.2 -min. This composition is suitable to hermetically seal to metallic electrical components which will be subjected to humid environments over an extended period of time.

Abstract: This invention is directed to the production of glasses exhibiting an annealing point between 290.degree.-325.degree. C., an index of refraction between 1.57-1.66, a linear coefficient of thermal expansion (25.degree.-300.degree. C.) between 130-160.times.10.sup.-7 /.degree.C., and a weight loss after exposure to boiling water for six hours no greater than 0.1% consisting essentially, expressed in terms of mole percent on the oxide basis, of______________________________________ Li.sub.2 O 0-10 CaO + SrO + 0-20 BaO(RO) Na.sub.2 O 0-10 ZnO 26-50 Li.sub.2 O + Na.sub.2 O 1-20 RO + ZnO 26-50 K.sub.2 O 0-8 SnO 0-5 Li.sub.2 O + Na.sub.2 O + 5-25 Sb.sub.2 O.sub.3 0-8 K.sub.2 O(R.sub.2 O) Ag.sub.2 O 0-13 Al.sub.2 O.sub.3 0.25-5 Tl.sub.2 O 0-12 P.sub.2 O.sub.5 30-36 Ag.sub.2 O + Tl.sub.2 O 1-14 B.sub.2 O.sub.3 0-5 R.sub.2 O + Ag.sub.2 O + Tl.sub.2 O 15-30 CuO 0-5 CaO 0-20 Bi.sub.2 O.sub.3 0-3 BaO 0-10 CeO.sub.

Abstract: This invention is directed towards the production of a bioabsorbable glass-polymer alloy comprising a bioabsorbable glass and a bioabsorbable polymer, said glass having a working temperature below about 350.degree. C., a transition temperature no higher than about 250.degree. C., and which exhibits a dissolution weight loss rate which is similar to the rate at which a bioabsorbable polymer is absorbed by the body. Such exemplary bioabsorbable polymers include poly(lactic) acid, poly(glycolic) acid, poly(dioxanone), polyethylene terephthalate, polyethylene oxide poly(caprolactone), copolymers of lactic acid and glycolic acid, and mixtures thereof.The glass disclosed herein consists essentially, expressed in terms of weight percent on the oxide basis, of at least 85% total of 30-55% P.sub.2 O.sub.5, 12-35% ZnO, 10-30% Cl, and 15-40% R.sub.2 O, wherein R.sub.2 O consists of at least one alkali metal oxide in the indicated proportions selected from the group consisting 5-25% Na.sub.2 O, 0-25% K.sub.

Abstract: Faraday rotation glass having a practically sufficiently large Verdet's constant, which contains 60 to 75 mol % of P.sub.2 O.sub.5, 10 to 20 mol % of Tb.sub.2 O.sub.3 and 10 to 25 mol % of K.sub.2 O and having substantially no platinum inclusion.

Abstract: An optical glass has fluorine ion F.sup.- and oxygen ion O.sup.2- as anions. The cations in the glass expressed in terms of fluorides and mol % have the following preferred composite range:______________________________________ PF.sub.5 5.0-30.0% AlF.sub.3 19.0-40.0% CaF.sub.2 28.0-56.0% MgF.sub.2 0-20.0% SrF.sub.2 0-9.0% BaF.sub.2 0-18.0% ZnF.sub.2 0-10.0% YF.sub.3 0-13.0% LaF.sub.3 0-7.0% ______________________________________The F.sup.- /O.sup.2- ratio (the ratio of the number of fluorine ions to the number of oxygen ions) in the glass is in the range of 1.4 - 13.0. The specific gravity of glass is not more than 3.6.

Abstract: A calcium phosphate type glass-ceramic which comprises from 64 to 72% by weight of phosphorus oxide in terms of P.sub.2 O.sub.5, from 13 to 20% by weight of calcium oxide in terms of CaO, from 6 to 13% by weight of strontium oxide in terms of SrO, and from 3 to 15% by weight in total of at least one member selected from the group consisting of aluminum oxide, cerium oxide and lanthanum oxide respectively in terms of Al.sub.2 O.sub.3, Ce.sub.2 O.sub.3 and La.sub.2 O.sub.3, a molar ratio of (CaO+SrO)/P.sub.2 O.sub.5 being 0.78-0.86.

Abstract: A low-K crystallizable glass composition having a softening point of 550.degree.-800.degree. C., consisting essentially of mole % of:41-70% P.sub.2 O.sub.5 ;10-48% MgO, ZnO or mixtures thereof;2-20% Al.sub.2 O.sub.3, Cr.sub.2 O.sub.3 or mixtures thereof;0-10% alkali metal oxide(s);0-10% CaO, SrO, BaO or mixtures thereof;0-10% SiO.sub.2 ;0-20% B.sub.2 O.sub.3 ;0-10% ZrO.sub.2, TiO.sub.2 or mixtures thereof; and0-10% Fe.sub.2 O.sub.3, with the provisos that:(i) a=n(b+3c+d+e+2f+3g), wherein n=0.8-1.0, anda=mole % P.sub.2 O.sub.5 ;b=mole % MgO, ZnO or mixtures thereof;c=mole % Al.sub.2 O.sub.3, Cr.sub.2 O.sub.3 or mixtures thereof;d=mole % M.sub.2 O, where M=Na, K, Rb, Cse=mole % M'O, where M'=Ca, Sr, Baf=mole % ZrO.sub.2, TiO.sub.2 or mixtures thereof;g=mole % Fe.sub.2 O.sub.3, (where Ln is any of the rare earth elements), or mixtures thereof;(ii) the total amount of alkali oxides, CaO, SrO, and BaO does not exceed 10 mole %;(iii) the total amount of ZrO.sub.2, TiO.sub.2, and Fe.sub.2 O.sub.

Abstract: An aluminophosphate glass containing copper(II) oxide having a low transmission in the near infrared range with a steep absorption edge as well as a very uniform high transparency in the visible range is particularly suitable as filter glass for color video cameras or as filter glass, e.g., for goggles and color displays, said glass comprising, in % by weight on the oxide basis, 67-77 of P.sub.2 O.sub.5 ; 8-13 of Al.sub.2 O.sub.3 ; 0-5.5 of B.sub.2 O.sub.3 ; 0-2.1 of SiO.sub.2 ; 0-2.5 of Li.sub.2 O; 0-6 of Na.sub.2 O; 0-14 of K.sub.2 O; 0-2.5 of Rb.sub.2 O; 0-2.5 of Cs.sub.2 O; .SIGMA. alkali metal oxide 3-14; 2.5-4.9 of MgO; 0-2.5 of CaO; 0-2.5 of SrO; 0-2.5 of BaO; 0-2.5 of ZnO; .SIGMA. alkaline-earth metal oxides+ZnO less than 5; 2-7.5 of CuO; 0.001-0.5 of V.sub.2 O.sub.5 ; CuO+V.sub.2 O.sub.5 of 2-7.5.

Abstract: A low-or no-silica, low- or no-alkali phosphate glass useful as a laser amplifier in a multiple pass, high energy laser system having a high thermal conductivity, K.sub.90.degree. C. >0.85 W/mK, a low coefficient of thermal expansion, .alpha..sub.20.degree.-300.degree. C. <80.times.10.sup.-7 /.degree.C., low emission cross section, .sigma.<2.5.times.10.sup.-20 cm.sup.2, and a high fluorescence lifetime, .tau.>325 .mu.secs at 3 wt. % Nd doping, consisting essentially of (on an oxide composition basis):______________________________________ Mole % ______________________________________ P.sub.2 O.sub.5 52-72 Al.sub.2 O.sub.3 0-<20 B.sub.2 O.sub.3 >0-25 ZnO 0-31 Li.sub.2 O 0-5 K.sub.2 O 0-5 Na.sub.2 O 0-5 Cs.sub.2 O 0-5 Rb.sub.2 O 0-5 MgO >0-<30 CaO 0-20 BaO 0-20 SrO 0-<20 Sb.sub.2 O.sub.3 0-<1 As.sub.2 O.sub.3 0-<1 Nb.sub.2 O.sub.5 0-<1 Ln.sub.2 O.sub.3 up to 6.5 PbO 0-<5 SiO.sub.2 0-3 ______________________________________whereinLn.sub.2 O.sub.

Abstract: Ion-exchangeable phosphate glass compositions containing in mole percent from about 50 to 70% P.sub.2 O.sub.5, from about 5 to 30% Li.sub.2 O, from about 5 to 25% MO, where M is selected from the group consisting of Be, Mg, Ca, Sr, Ba, and Zn, and about 5 to 30% X.sub.2 O.sub.3, where X is selected from the group consisting of Al, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu are provided. In another aspect, the phosphate glass compositions of the present invention also contain in mole percent up to 10% R.sub.2 O, where R is selected from the group consisting of Na, K, Rb and Cs. Solarization inhibitors and minor amounts of anhydrous fluorides and chlorides are also included in some embodiments. Optical quality phosphate glass articles formed of the phosphate glass compositions of the present invention are readily ion- exchangeable when contacted with certain salts. Optical quality phosphate glass articles are also provided having good thermal shock resistance.

Abstract: This invention is drawn to fluorine-free glasses having refractive indices of at least 1.65 which generally consist, in mole percent, of:______________________________________ P.sub.2 O.sub.5 24-36 ZnO 0-45 Li.sub.2 O 0-15 Na.sub.2 O 0-20 K.sub.2 O 0-10 Ag.sub.2 O 0-25 Tl.sub.2 O 0-25 Li.sub.2 O + Na.sub.2 O + K.sub.2 O + Ag.sub.2 O + Tl.sub.2 O 15-30 PbO 0-20 CaO 0-20 CuO 0-5 CeO.sub.2 0-2 SrO 0-20 BaO 0-20 CaO + SrO + BaO 0-25 Sb.sub.2 O.sub.3 0-61 Bi.sub.2 O.sub.3 0-10 Sb.sub.2 O.sub.3 + Bi.sub.2 O.sub.3 0-61 Sb.sub.2 O.sub.3 + Bi.sub.2 O.sub.3 + Ag.sub.2 O + Tl.sub.2 O 7-76 SnO 0-5 Al.sub.2 O.sub.3 0-5 B.sub.2 O.sub.3 0-10 Al.sub.2 O.sub.3 + B.sub.2 O.sub.

Abstract: This invention is directed to the production of glasses demonstrating working temperatures below about 450.degree. C., transition temperatures no higher than about 350.degree. C., and good resistance to attack by mild aqueous alkaline solutions consisting essentially, expressed in terms of mole percent on the oxide basis of______________________________________ Li.sub.2 O 0-25 ZnO 25-50 Na.sub.2 O 5-20 Al.sub.2 O.sub.3 0-3 K.sub.2 O 0-12 P.sub.2 O.sub.5 25-37 Li.sub.2 O + Na.sub.2 O + K.sub.2 O 15-35 SnO 0-10 ______________________________________to which are included 0.5-8% Cl and 0-5% F., as analyzed in weight percent.

Abstract: A phosphate based laser glass composition for high average power systems including by mol percent 60-66% P.sub.2 O.sub.5, 6-9% Al.sub.2 O.sub.3, 8-12% Li.sub.2 O, 0-15% MgO, 0-15% ZnO, 0-5% B.sub.2 O.sub.3 and 0.1-4%, Nd.sub.2 O.sub.3, with MgO+ZnO totaling 14-16%.

Abstract: Ion-exchangeable phosphate glass compositions containing in mole percent from about 50 to 70% P.sub.2 O.sub.5, from about 5 to 30% Li.sub.2 O, from about 5 to 25% MO, where M is selected from the group consisting of Be, Mg, Ca, Sr, Ba, and Zn, and about 5 to 30% X.sub.2 O.sub.3, where X is selected from the group consisting of Al, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu are provided. In another aspect, the phosphate glass compositions of the present invention also contain in mole percent up to 10% R.sub.2 O, where R is selected from the group consisting of Na, K, Rb and Cs. Solarization inhibitors and minor amounts of anhydrous fluorides and chlorides are also included in some embodiments. Optical quality phosphate glass articles formed of the phosphate glass compositions of the present invention are readily ion-exchangeable when contacted with certain salts. Optical quality phosphate glass articles are also provided having good thermal shock resistance.

Abstract: A method of improving surface-dependent properties of phosphate glass such as durability and wear resistance without significantly affecting its thermal expansion coefficient is provided which comprises annealing the glass in a dry ammonia atmosphere at temperatures approximating the transition temperature of the glass. The ammonia annealing treatment of the present invention is carried out for a time sufficient to allow incorporation of a thin layer of nitrogen into the surface of the phosphate glass, and the treatment improves the durability of the glass without the reduction in the thermal expansion coefficient that has restricted the effectiveness of prior ammonia treatments. The improved phosphate glass resulting from this method is superior in wear resistance, yet maintains suitable thermal expansion properties so that it may be used effectively in a variety of applications requiring hermetic glass-metal seals.

Abstract: A green optical filter phosphate-based glass having a high near infrared, absorption at about 650 nm to 950 nm and a transmission peak transmission at 550 nm to 560 nm and with the steepest slope of the absorption curve occurring between about 570 nm to 650 nm. The glass composition comprising, in mol %: 50 to 60% P.sub.2 O.sub.5, O to 5% SiO.sub.2, 20 to 33% Li.sub.2 O, 0 to 25% Na.sub.2 O, 1 to 25% K.sub.2 O, 0 to 5% for each of CaO, Bao, SrO and MgO, 7 to 10% Al.sub.2 O.sub.3, 3 to 6% CuO, 0.5 to 1.6% Cr.sub.2 O.sub.3, 0.5 to 2.0% Ho.sub.2 O.sub.3, 0.5 to 2.0 Dy.sub.2 O.sub.3 and 0 to 2.0% Er.sub.2 O.sub.3.

Abstract: A low- or no-silica phosphate glass useful as a high average power laser medium and having a high thermal conductivity, K.sub.90.degree. C. >0.8 W/mK, and a low coefficient of thermal expansion, .alpha..sub.20.degree.-300.degree. C. <90.times.10.sup.-7 /.degree.C., consisting essentially of (on a batch composition basis):______________________________________ Mole % ______________________________________ P.sub.2 O.sub.5 45-70 Li.sub.2 O 0-14 Na.sub.2 O 0-12 K.sub.2 O 0-6 Al.sub.2 O.sub.3 9-15 Nd.sub.2 O.sub.3 0.01-6 La.sub.2 O.sub.3 0-6 SiO.sub.2 0-8 B.sub.2 O.sub.3 0-8 MgO 6-30 CaO 0-15 SrO 0-9 BaO 0-9 ZnO 0-15 .SIGMA. MgO + Li.sub.2 O 20-30 ______________________________________whereby said glass has K.sub.90.degree. C. >0.8 W/mK and .alpha..sub.20.degree.-300.degree. C. <90.times.10.sup.-7 /.degree.C. The Nd.sub.2 O.sub.3 can be replaced by other lasing species.

Abstract: This invention is particularly directed to the production of glass molds for use in press molding optically finished lenses. The inventive glass compositions consist essentially, in mole percent, of 34-56% ZnO, 4-14% Al.sub.2 O.sub.3, 40-52% P.sub.2 O.sub.5, and up to 15% total of optional modifying oxides including up to 5% Li.sub.2 O and/or Na.sub.2 O and/or K.sub.2 O, up to 5% Sb.sub.2 O.sub.3, and up to 15% total of CaO and/or SrO and/or BaO.

Abstract: This invention is drawn particularly to the production of glasses having essentially fluorine-free compositions consisting essentially, in mole percent, of:______________________________________ Li.sub.2 O 5-10 P.sub.2 O.sub.5 30-36 Na.sub.2 O 5-15 Al.sub.2 O.sub.3 0-5 K.sub.2 O 0-6 CeO.sub.2 0-2 Li.sub.2 O + Na.sub.2 O + K.sub.2 O 15-25 SnO 0-20 ZnO 10-33 PbO 0-20 CaO 0-20 Sb.sub.2 O.sub.3 0-12 SrO 0-20 Bi.sub.2 O.sub.3 0-6 BaO 0-20 SnO + PbO + 0-20. Sb.sub.2 O.sub.3 + Bi.sub.2 O.sub.

Abstract: This invention is concerned with the preparation of glasses exhibiting transition temperatures below 450.degree. C., working temperatures below 500.degree. C., and exceptional resistance to mild aqueous alkaline solutions consisting essentially, expressed in terms of mold percent on the oxide basis, of:______________________________________ ZnO 12-55 K.sub.2 O 0-25 P.sub.2 O.sub.5 28-40 Li.sub.2 O + Na.sub.2 O + K.sub.2 O 10-35 Li.sub.2 O 0-25 Rare earth metal oxide 1-5 Na.sub.2 O 0-25 ______________________________________At least two alkali metal oxides will most desirably be present.

Abstract: Phosphate laser glass compositions which include erbium ions as the active laser ion material. In one aspect, ytterbium, chromium and cerium ions are present as auxiliary dopants. The ytterbium, chromium and cerium additives serve to sensitize the erbium-doped phosphate glasses of the present invention. The glasses are particularly useful in applications where an "eye-safe" wavelength is desirable.

Abstract: Glass ceramics used as dental material, artifical bone, etc. which contain 0.01 to 25 parts by weight of alkali metal oxides (R.sub.2 O), such as Li.sub.2 O, Na.sub.2 O, K.sub.2 O, Rb.sub.2 O, and Cs.sub.2 O, in 100 parts by weight of CaO-Al.sub.2 O.sub.3 -P.sub.2 O.sub.5 system material. During the casting for obtaining the glass ceramics, the molten fluid is sufficiently distributed to the fine corners of a mold, and the temperature for crystallization is low. Also, the time required for the crystallization is short and the crystalline formed shows no internal defects, and has high bending strength.

Abstract: This invention is directed to the preparation of glasses exhibiting a transition temperature below 450.degree. C., a working temperature below 500.degree. C., and excellent resistance to attack by water and mild aqueous alkaline solutions. The glasses consist essentially, in mole percent, of at least 65% total of 23-55% ZnO, 28-40% P.sub.2 O.sub.5, and 10-35% R.sub.2 O, wherein R.sub.2 O consists of at least two alkali metal oxides in the indicated proportions selected from the group consisting of 0-25% Li.sub.2 O, 0-25% Na.sub.2 O, and 0-25% K.sub.2 O, and up to 35% total of optional ingredients in the indicated proportions selected from the group consisting of 0-6% Al.sub.2 O.sub.3, 0-8% B.sub.2 O.sub.3, 0-8% Al.sub.2 O.sub.3 +B.sub.2 O.sub.3, 0-15% Cu.sub.2 O, 0-5% F, 0-35% PbO, 0-35% SnO, 0-35% PbO+SnO, 0-5% ZrO.sub.2, 0-4% SiO.sub.2, and 0-15% MgO+CaO+SrO+BaO+MnO, consisting of 0-10% MgO, 0-10% CaO, 0-10% SrO, 0-12% BaO, and 0- 10% MnO.

Abstract: A low- or no-silica phosphate glass useful as a laser medium and having a high thermal conductivity, K.sub.90.degree. C. >0.8 W/mK, and a low coefficient of thermal expansion, .alpha..sub.20.degree.-40.degree. C. <80.times.10.sup.-7 /.degree.C., consists essentially of (on a batch composition basis):______________________________________ Mole % ______________________________________ P.sub.2 O.sub.5 45-70 Li.sub.2 O 15-35 Na.sub.2 O 0-10 Al.sub.2 O.sub.3 10-15 Nd.sub.2 O.sub.3 0.01-6 La.sub.2 O.sub.3 0-6 SiO.sub.2 0-8 B.sub.2 O.sub.3 0-8 MgO 0-18 CaO 0-15 SrO 0-9 BaO 0-9 ZnO 0-15 ______________________________________the amounts of Li.sub.2 O and Na.sub.2 O providing an average alkali metal ionic radius sufficiently low whereby said glass has K.sub.90.degree. C. >0.8 W/mK and .alpha..sub.20.degree.-40.degree. C. <80.times.10.sup.-7 /.degree.C., and wherein, when the batch composition is melted in contact with a silica-containing surface, the final glass composition contains at most about 3.

Abstract: This invention relates to the preparation of glasses exhibiting low transition temperatures with excellent chemical durability. The glasses consist essentially, in mole %, of:______________________________________ P.sub.2 O.sub.5 44-58 Al.sub.2 O.sub.3 + 4-10 Na.sub.2 O + Li.sub.2 O 10-45 B.sub.2 O.sub.3 Al.sub.2 O.sub.3 0-7 Na.sub.2 O 10-30 Cu.sub.2 O 0-20 B.sub.2 O.sub.3 0-10 Li.sub.2 O 0-30 Li.sub.2 O + Cu.sub.