Abstract: Al2O3—Y2O3—ZrO2/HfO2 ceramics (including glasses, crystalline ceramics, and glass-ceramics) and methods of making the same. Ceramics according to the present invention can be made, formed as, or converted into glass beads, articles (e.g., plates), fibers, particles, and thin coatings. The particles and fibers are useful, for example, as thermal insulation, filler, or reinforcing material in composites (e.g., ceramic, metal, or polymeric matrix composites). The thin coatings can be useful, for example, as protective coatings in applications involving wear, as well as for thermal management. Certain ceramic particles according to the present invention can be are particularly useful as abrasive particles.

Abstract: Methods of making amorphous material and ceramic materials. Embodiments of the invention can be used to make abrasive particles. The abrasive particles can be incorporated into a variety of abrasive articles, including bonded abrasives, coated abrasives, nonwoven abrasives, and abrasive brushes.

Abstract: A composition has a durability to a sterilization treatment using vapor under high temperature and pressure and capable of transmitting or absorbing light. The composition comprises a group A including 15 to 23 mol % of lanthanum oxide, 3 to 8 mol % of gadolinium oxide, 3 to 8 mol % of tantalum oxide, and 8 mol % or less of yttrium oxide; a group B including 30 to 45 mol % of boron oxide, 20 mol % or less of silicon oxide, and 20 mol % or less of germanium oxide; zero mol % of alkaline metal oxide or alkaline earth metal oxide; and a group D including 0.3 to 15 mol % of niobium oxide and 3 to 15 mol % of zirconium oxide. A mol % ratio A/B between the group A and group B is 80% or more, and a dissolving-out rate of metal ion of the composition is 0.002×10−6 mol/hour or less per square centimeter.

Abstract: According to one aspect of the present invention an optically active glass contains Sb2O3, up to about 4 mole % of an oxide of a rare earth element, and 0-20 mole % of a metal halide selected from the group consisting of a metal fluoride, a metal bromide, a metal chloride, and mixtures thereof, wherein this metal is a trivalent metal, a divalent metal, a monovalent metal, and mixtures thereof. In addition, any of the glass compositions described herein may contain up to 15 mole % B2O3 substituted for an equivalent amount of Sb2O3.

Abstract: A low melting point glass for covering electrodes, which contains Cu in a content as calculated as CuO within a range of from 0.1 to 0.9% by mass percentage and which contains neither Mo or Sb.

Abstract: A bulk single phase glass comprising 23 molar % to 50 molar % rare earth oxides, RE203, and 50 molar % to 77 molar % aluminum oxide, A12O3 is provided. The glass contains at least 50 molar % of Al2O3+RE2O3 and smaller amounts of oxide glass forming agents and other oxides than are found in prior art glasses. The addition of small amounts of lanthanum oxide, La2O3, prevents phase separation. The single phase glass is useful for optical applications such as lasers and optical amplifiers.

Abstract: The present invention relates to an oxyhalide glass matrix including 0-70 mol. % SiO2, 5-35 mol. % Al2O3, 1-50 mol. % B2O3, 5-35 mol. % R2O, 0-12 wt. % F, 0-12 wt. % Cl, and 0 to 0.2 mol. % rare earth element, wherein R is Li, Na, K, Rb, or Cs. The present invention further relates to a method of producing the glass matrix and to a method of modifying the spectral properties of an oxyhalide glass.

Abstract: A durable low Tg Sb-stabilized Mo+W phosphate based glass composition exhibiting superior resistance to attack by boiling water, humidity and acids resulting from the addition of Sb to Mo+W phosphate based glass compositions. Specifically, the present invention discloses a glass composition comprising in mol % on the oxide basis, of 0-40% R2O where R includes the alkali metals (Li, Na, K, Rb or Cs) as well as Ag and Tl, 0-20% XO where X includes the alkaline earth metals (Mg, Ca, Sr or Ba) as well as Cu, Zn, Cd and Pb, 15-80% MoO3+WO3, 0.5-60% Sb2O3, and 10-40% P2O5. Additionally, the Sb-stabilized Mo+W phosphate based glass composition can contain a total of 0-5%, in mole percent (mol %) on the oxide basis, of glass forming oxides including, but not limited to, B2O3, Al2O3, SiO2, TeO2, Ga2O3, GeO2, transition metal and rare earth metal oxides, or mixtures thereof.

Abstract: A glass consisting essentially of antimony oxide. An optically active glass consisting essentially of antimony oxide and up to about 4 mole % of an oxide of a rare earth element. A rare earth-doped, antimony oxide-containing glass including 0-99 mole % SiO2, 0-99 mole % GeO2, 0-75 mole % (Al, Ga)2O3, 0.5-99 mole % Sb2O3, and up to about 4 mole % of an oxide of a rare earth element. The oxide of the rare earth element may comprise Er2O3. The glass of the invention further includes fluorine, expressed as a metal fluoride. An optical energy-producing or light-amplifying device, in particular, an optical amplifier, comprising the above-described glass. The optical amplifier can be either a fiber amplifier or a planar amplifier, either of which may have a hybrid composition. Embodiments of the glass of the invention can be formed by conventional glass making techniques, while some of the high content antimony oxide embodiments are formed by splat or roller quenching.

Abstract: A nonradioactive glass in particulate form adapted for radiation therapy in a mammal comprise a biodegradable rare earth-lithium borate glass material of a specified composition which, upon being subjected to an effective amount of neutron irradiation, will produce a beta or gamma emitting radioisotope, the radioisotope being distributed throughout the glass material, the glass upon being introduced into a body fluid for radiation therapy being adapted to react therewith causing the radioisotope to form an insoluble compound on the surface of the glass material which is retained in the glass material and thereby prevented from escaping from the treatment site. Radioactive glasses and methods for carrying out radiation therapy with such radioactive glasses are also disclosed.

Abstract: A dielectric composition for a plasma display panel. In the dielectric composition, a P2O5—ZnO—BaO group glass is used. Accordingly, the dielectric composition is capable of meeting optical, thermal and electrical characteristic requirements of a dielectric layer and allows the dielectric layer to have a light weight.

Abstract: A tin-borophosphate glass of the present invention has main components of SnO, B2O3, and P2O5, consists essentially of, by mole % representation, 30-70% SnO, 5-30% B2O3, and 24-45% (24% exclusive) P2O5, and satisfies a condition of B2O3/P2O5≧0.20 by mole ratio.

Abstract: A tin borophosphate glass for use in sealing materials includes, by mole, 30 to 80% of SnO, 5 to 60% of B2O3, and 5 to 24% of P2O5 as main components. The glass is free of lead but is of equal quality to those of conventional lead-containing sealing glasses. The glass can provide a satisfactory sealing material.

Abstract: The present invention provides an oxide glass capable of exhibiting a long lasting afterglow and photostimulated phosphorescence, can be used not only as a material for confirming an infrared laser or controlling an optical axis, but also as a material for recording or reproducing of &ggr;-rays, X-rays or UV-rays images and further can be used as an optical recording material of such a type that can be read. This glass material is represented, in term of atoms for making up the glass, by the following chemical composition (mol %): GeO2 21 to 80% ZnO 0 to 50% Ga2O2 0 to 55% (ZnO + Ga2O3 = 3 to 55%) Tb2O3 0 to 10% MnO 0 to 2% (Tb2O3 + MnO = 0.01 to 10%) R2O 0 to 45% (R: at least one atom selected from Li, Na, K and Cs) R′O 0 to 40% (R′: at least one atom selected from Mg, Ca, Sr and Ba) R2O + R′O 0.

Abstract: A sealing glass composition in powdered form comprising a crystallizable base glass in the vitreous state and vanadium zirconium silicate in an amount from about 0.1 to 1 weight percent of the base glass. The sealing glass also may contain aluminum oxide having a particle size of about 90 to 99 percent minus 325 mesh in an amount from about 0.1 to 1.0 weight percent of the base glass and bismuth nitrate in an amount from about 0.02 to 0.08 weight percent of the base glass. The glass composition can be used to seal cathode ray tube face plates and funnels with excellent results when heated to a hold range of about 4300 C to 4500 C. The crystallized sealing glass exhibits improved adhesion to seal edges of the face plates and funnels, increased strength, and improved resistance to organic contamination.

Abstract: A nonradioactive glass in particulate form adapted for radiation therapy in a mammal comprise a biodegradable rare earth-lithium borate glass material of a specified composition which, upon being subjected to an effective amount of neutron irradiation, will produce a beta or gamma emitting radioisotope, the radioisotope being distributed throughout the glass material, the glass upon being introduced into a body fluid for radiation therapy being adapted to react therewith causing the radioisotope to form an insoluble compound on the surface of the glass material which is retained in the glass material and thereby prevented from escaping from the treatment site. Radioactive glasses and methods for carrying out radiation therapy with such radioactive glasses are also disclosed.

Abstract: A family of aluminoborate glasses that are compatible with aluminum at elevated temperatures, and an article comprising such a glass with either an aluminum coating, or with aluminum particles dispersed within the glass, whereby the glass may be rendered polarizing. The base glass consists essentially of, 15-85% B2O3, 5-45% Al2O3 and 10-75% Li2O+RO, where RO represents the alkaline earth metal oxides MgO, CaO, SrO and BaO, and is free of oxides reacting with aluminum at elevated temperatures.

Abstract: A glass composition comprising, based on mole %, 50-67% B.sub.2 O.sub.3 ; 20-50% M.sup.II O where M.sup.II is selected from the group consisting of alkaline earth elements; 2-15% Ln.sub.2 O.sub.3 where Ln is selected from the group consisting of rare earth elements and further comprising, based on mole %, 0-6% M.sup.I.sub.2 O where M.sup.I is selected from the group consisting of alkali elements and 0-10% Al.sub.2 O. The glass composition incorporated into a castable dielectric composition comprising a dispersion of finely divided solids comprising, based on solids: (a) 25-50 wt. % the glass composition; (b) 50-75 wt % refractory oxide; both dispersed in a solution of (c) an organic polymeric binder; and (d) a volatile organic solvent. The castable dielectric composition used in a method of forming a low loss green tape by casting a thin layer of the dispersion onto a flexible substrate and heating the cast layer to remove the volatile organic solvent.

Abstract: The invention provides a nonmagnetic ceramic comprising 5% to 40% by weight of .alpha.-quartz and 5% to 60% by weigth of zinc silicate dispersed in 35% to 75% by weight of borosilicate glass as a matrix, the borosilicate glass having SiO.sub.2 and B.sub.2 O.sub.3 contents: SiO.sub.2 =70 to 90% by weight and B.sub.2 O.sub.3 =10 to 30% by weight. Using the nonmagnetic ceramic, multilayer ceramic inductors are obtained. When the ceramic is used as ceramic multilayer parts having an inductor section, it has a low dielectric constant and good characteristics in the high-frequency region, allows for low-temperature firing enabling the use of silver electrodes, prevents chip deformation and crack occurrence upon sintering, and provides a higher mechanical strength.

Abstract: A substrate for a plasma display panel, having electrodes and a covering material for the electrodes, provided thereon, wherein the covering material is a non-crystallizable glass having a softening point of at most 510.degree. C. and an average thermal expansion coefficient of from 70.times.10.sup.-7 to 85.times.10.sup.-7 /.degree.C. within a range of from 50 to 350.degree. C.

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: A method of joining similar or dissimilar ceramic and ceramic composite materials, such as SiC continuous fiber ceramic composites, at relatively low joining temperatures uses a solventless, three component bonding agent effective to promote mechanical bond toughness and elevated temperature strength to operating temperatures of approximately 1200 degrees C. The bonding agent comprises a preceramic precursor, an aluminum bearing powder, such as aluminum alloy powder, and mixtures of aluminum metal or alloy powders with another powder, and and boron powder in selected proportions. The bonding agent is disposed as an interlayer between similar or dissimilar ceramic or ceramic composite materials to be joined and is heated in ambient air or inert atmosphere to a temperature not exceeding about 1200 degrees C. to form a strong and tough bond joint between the materials.

Abstract: High rare-earth content glasses (Ln.sub.2 O.sub.3 .gtoreq.20 mol %) have applications as high optical density wavelength-selective filters, faraday rotators, scintillation glasses and high index glasses. New glasses are formed by adding TiO.sub.2 to the system SiO.sub.2 --B.sub.2 O.sub.3 --Al.sub.2 O.sub.3 --Ln.sub.2 O.sub.3. These glasses have improved optical properties, extended glass formation range and have superior resistance to devitrification. In some embodiments TiO.sub.2 can fully replace the Al.sub.2 O.sub.3. In additional embodiments, SiO.sub.2 can be completely removed from the glass.

Abstract: A method of strengthening a glass article by developing compressive stress in a surface layer on the article through an exchange of alkali metal ions in the surface layer at an elevated temperature below the glass strain point, the step of minimizing stress relaxation by carrying out the ion exchange in a glass essentially free from non-bridging oxygen atoms. Glasses having particular utility contain alumina in their compositions in such amount that the number of aluminum atoms in a glass are at least equal to the number of alkali metal ions, or contain both alumina and boric oxide in such amounts that the formula ##EQU1## is satisfied.

Abstract: The object of the present invention is to provide a glass composition which has a sufficient bonding strength for bonding a fluorescent film with a glass tube, does not hinder decomposition of the binder and is effective as an adhesive material, and to provide a fluorescent lamp using the glass composition. The object can be achieved by a glass composition, represented by the general formula,xMO.yB.sub.2 O.sub.3.zM'.sub.2 O.sub.3.uM"O.sub.2.vM'".sub.2 O.sub.5in which M is at least one element of Mg, Ca, Sr, Ba and Zn, M' is at least one element of Al, Sc, Y and lanthanoid elements, M" is at least one element of Ti, Zr, Hf, Th and Si, M'" is at least one element of Nb and Ta, x, y, z, u and v satisfy the relationships of 0<x.ltoreq.70, 15.ltoreq.y.ltoreq.80, 0.ltoreq.z.ltoreq.50, 0.ltoreq.u.ltoreq.30, 0.ltoreq.v.ltoreq.30, 0.5.ltoreq.u+v.ltoreq.50 and x+y+z+u+v=100, represented by mol %, and by a fluorescent lamp, in which the glass composition is incorporated in a phosphor layer in a proportion of 0.

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: Inorganic reinforcing fibers provided with a multi-layer protective coating comprising a boron nitride sublayer and an oxide-based overcoating of alumina or synthetic mica, and fiber-reinforced ceramic matrix composite products incorporating the protectively-coated fibers, are disclosed. The fibers offer improved oxidation resistance and good compatibility with oxide-based glass and glass-ceramic composite matrix materials.

Abstract: In order to improve a reliability of a glass joint body, first ceramic member and second ceramic member are connected by using (a) glass consisting of 10.about.65 wt % of SiO.sub.2, 30 wt % or less of Na.sub.20, and the balance of B.sub.2 O.sub.3 and Al.sub.2 O.sub.3, (b) glass including less than 10 wt % of SiO.sub.2, and 30.about.80 wt % of B.sub.2 O.sub.3, (c) glass including substantially none of SiO.sub.2, and 30.about.80 wt % of B.sub.2 O.sub.3, or (d) glass consisting of 10.about.65 wt % of SiO.sub.2, 20 wt % or less of Na.sub.2 O, 30 wt % or less of Al.sub.2 O.sub.3, 20 wt % or less of MgO, and the balance of B.sub.2 O.sub.3.

Abstract: This invention is directed to a method for preparing glass sheet having surfaces which are essentially defect-free and equivalent in smoothness to polished glass surfaces which comprises the steps of: Two different batches of alkali-metal-free batches are melted and formed into a laminated sheet and the first glass is enclosed by the second glass. The second glass is 1000 times more soluble than the first glass. The laminate is contacted with an acid to dissolve the second glass wherein the first glass remains with essentially defect free surfaces.

Abstract: An optical crown glass having a negative anomalous partial dispersion .DELTA.P.sub.g,F, a refractive index n.sub.d of greater than 1.52, an Abbe number .nu..sub.d of greater than 57, and a high UV transmission has a composition (in % by weight) 40-72 B.sub.2 O.sub.3, 9-31 Al.sub.2 O.sub.3, 0-15 SiO.sub.2, 0.1-0.5 H.sub.2 O, 0-12 Li.sub.2 O, wherein the total of R.sub.2 O (R=Li, Na, K, Rb, Cs) is 0-20 and the total of MO (M=Mg, Ca, Sr, Ba) is 0-30, and wherein the total of R.sub.2 O and MO is greater than 5, and the molar ratio between Al.sub.2 O.sub.3 and B.sub.2 O.sub.3 is 0.2-0.3 and the molar ratio between (R.sub.2 O+MO) and B.sub.2 O.sub.3 is 0.1-0.4.

Abstract: A magnetic head comprising magnetic core halves which are sealed with a sealing glass which consists essentially of 1 to 75 wt. % of TeO.sub.2, 1 to 30 wt. % of B.sub.2 O.sub.3, 1 to 75 wt. % of PbO, 1 to 25 wt. % of CdO, 0 to 15 wt. % of ZnO, 0 to 25 wt. % of Bi.sub.2 O.sub.3, 0 to 5 wt. % of A.sub.2 O wherein A is an alkali metal, 0 to 35 wt. % of ARO wherein AR is an alkaline earth metal, 0 to 35 wt. % of La.sub.2 O.sub.3, 0 to 5 wt. % of at least one oxide selected from the group consisting of Al.sub.2 O.sub.3, SiO.sub.2, TiO.sub.2 and ZrO.sub.2, 0 to 10 wt. % of at least one oxide selected from the group consisting of Ta.sub.2 O.sub.5, Nb.sub.2 O.sub.5, WO.sub.3 and MoO.sub.3, 0 to 30 wt. % of PbF.sub.2, and 0 to 2 wt. % of CoO, has a coefficient of thermal expansion of from 82.times.10.sup.-7 /.degree.C. to 137.times.10.sup.-7 /.degree.C. in a temperature range between 30.degree. C. and 300.degree. C., a working temperature of from 430.degree. to 620.degree. C.

Abstract: A ceramic composition for forming a ceramic dielectric body having a dielectric constant of less than about 5.5 and a TCE of less than about 4.5 ppm/.degree. C. The composition comprises a mixture of finely divided particles of 25-50 vol. % borosilicate glass 40-75 vol. % silica glass and 1-40 wt. % of a material selected from the group consisting of Ga.sub.2 O.sub.3, Ga.sub.2 SiO.sub.5, Ga.sub.2 TiO.sub.5, GaAs, GaPO.sub.4 and any gallium-contained compounds to inhibit the formation of crystalline forms of silica. The composition can be used with a polymeric binder to produce an unfired green tape which is co-fireable with high conductivity metallurgies such as gold, silver and silver/palladium.

Abstract: A ceramic material for electronic circuit devices is sintered at less than r equal to 1000.degree. C. temperature. A filler material such as quartz and a glassy binder RO-Al.sub.2 O.sub.3 -B.sub.2 O.sub.3 are mixed together along with an appropriate glassy binder prior to firing. RO is drawn from the group of metal oxides MgO, CaO, SrO, BaO, ZnO or CdO and the glassy binders form no more than 40 vol % of the ceramic material. The glassy binder has a suitable viscosity and other properties so that after it is mixed with the quartz filler, sintering occurs at the relatively low temperature. As a consequence, high conductivity conductors made of copper, silver and gold can be appropriately metallized prior to firing. The strength and low dielectric constant of the ceramic material make the material well adapted for ceramic substrates, thick films and the like which are used in VHSIC and VLSI applications.

Abstract: Glass compositions containing CaO, Al.sub.2 O.sub.3, B.sub.2 O.sub.3, SrO and BaO of various combinations of mole % are provided. These compositions are capable of forming stable glass-to-metal seals with titanium and titanium alloys, for use in components such as seals for battery headers.

Abstract: The present invention relates to a method for making a glass article having at least one surface which is essentially defect-free and is at least equivalent in smoothness to a polished surface. The method includes the steps of:(a) bringing into contact with each other a body of a glass which is relatively insoluble in an acid solution and a body of a glass consisting essentially, expressed in terms of cation percent on the oxide basis, of 70-85% B.sub.2 O.sub.3, 7-20% BaO, 0-10%, PbO, 0-12% R.sub.2 O, wherein R.sub.2 O consists of Li.sub.2 O+Na.sub.2 O+K.sub.2 O, 3-15% PbO+R.sub.2 O, the glass from its setting point to room temperature having a linear coefficient of thermal expansion within about 5.times.10.sup.-7 /.degree.C. of that of the relatively insoluble glass, a strain point within 10.degree. C.

Abstract: A ceramic material for electronic circuit devices is sintered at less than or equal to 1000.degree. C. temperature. A filler material such as quartz and a glassy binder RO--Al.sub.2 O.sub.3 --B.sub.2 O.sub.3 are mixed together along with an appropriate glassy binder prior to firing. RO is drawn from the group of metal oxides MgO, CaO, SrO, BaO, ZnO or CdO and the glassy binders form no more than 40 vol% of the ceramic material. The glassy binder has a suitable viscosity and other properties so that after it is mixed with the quartz filler, sintering occurs at the relatively low temperature. As a consequence, high conductivity conductors made of copper, silver and gold can be appropriately metallized prior to firing. The strength and low dielectric constant of the ceramic material make the material well adapted for ceramic substrates, thick films and the like which are used in VHSIC and VLSI applications.

Abstract: Glass compositions containing CaO, Al.sub.2 O.sub.3, B.sub.2 O.sub.3, SrO and BaO in various combinations of mole % are provided. These compositions are capable of forming stable glass-to-metal seals with pin materials of 446 Stainless Steel and Alloy-52 rather than molybdenum, for use in harsh chemical environments, specifically in lithium batteries.

Abstract: Radioactive microspheres for radiation synovectomy of arthritic joints in a mammal comprises a biodegradable glass material and a beta radiation emitting radioisotope chemically dissolved in and distributed substantially uniformly throughout the glass material. The biodegradable glass material may be lithium silicate, lithium aluminosilicate, lithium aluminoborate, lithium germanate, lithium aluminogermanate, potassium silicate, potassium aluminosilicate, potassium aluminoborate, potassium germanate or potassium aluminogermanate and the beta radiation emitting radioisotope may be samarium-153, holmium-166, erbium-169, dysprosium-165, rhenium-186, rhenium-188 or yttrium-90. Method for preparing such microspheres and for carrying out radiation synovectomy of arthritic joints utilizing such microspheres are also disclosed.

Abstract: An information recording disk for recording an information signal along a track defined by a depression on the disk as a change of physical property of a recording material deposited on the track comprises a disk-shaped glass substrate made of a glass and carries a groove corresponding to the track. The groove has a surface roughness substantially smaller as compared to the surface roughness caused at a bottom surface of a groove on a silica glass substrate when both the disk-shaped glass substrate and silica glass substrate are dry-etched under same conditions. The disk-shaped glass substrate comprises SiO.sub.2 component and one or both of Al.sub.2 O.sub.3 and BaO components with substantially no alkali components. Further, a recording layer comprised of the recording material which changes in physical property responsive to a projected energy beam is deposited on the substrate such that the depression is formed in correspondence with the track.

Abstract: PbO-B.sub.2 O.sub.3 -Ag.sub.2 O glasses having a preferred weight ratio range of 76-88:10-15:2-10 have glass transistion temperatures of less than 300.degree. C. and are especially useful for adhering together ceramic substrates such as for attaching integrated circuits to ceramic substrates. The glasses can be formulated with Ag particulates and organics and applied as pastes to provide conductive adhesives.

Abstract: An alkali-free composition for making a ceramic dielectric body having a dielectric constant less than 5.0, which is a mixture of finely divided particles consisting essentially of 70-85% wt. slica and 15-30% wt. zinc borate flux. This composition can be used to make green tape and multilayer devices having internal copper conductors such as multilayer capacitors and multilayer interconnects.

Abstract: An alkali-free composition for making a ceramic dielectric body having a dielectric constant less than 5.0, which is a mixture of finely divided particles consisting essentially of 70-85% wt. silica and 15-30% wt. zinc borate flux. This composition can be used to make green tape and multilayer devices having internal copper conductors such as multilayer capacitors and multilayer interconnects.

Abstract: This invention is directed to the production of glass-ceramic bodies through the sintering of finely-divided glass powders into an integral body accompanied with the generation of crystals therein. The inventive products have compositions consisting essentially, selected from the group, in weight percent, consisting of:(a) 20-30% CaO, 35-55% Al.sub.2 O.sub.3, and 20-40% B.sub.2 O.sub.3 ;(b) 30-45% SrO, 30-45% Al.sub.2 O.sub.3, and 20-35% B.sub.2 O.sub.3 ;(c) 40-55% BaO, 25-40% Al.sub.2 O.sub.3, and 15-30% B.sub.2 O.sub.3 ; and(d) mixtures thereof.The predominant crystal phase is an alkaline earth metal aluminoborate.

Abstract: An optical memory element comprising a substrate with grooves functioning as grooves for, for example, controlling the position of a laser beam, wherein said substrate is composed of a glass containing SiO.sub.2 in the range of 51 to 71% by weight, Na.sub.2 O in the range of 10 to 18% by weight, K.sub.2 O in the range of 0 to 8% by weight, Al.sub.2 O.sub.3 in the range of 12 to 22% by weight, and B.sub.2 O.sub.3 in the range of 0 to 9% by weight.

Abstract: A nitrogen fireable resistor composition comprising:a. a conductive phase containing (1) a perovskite of the form A'.sub.1-x A".sub.x B'.sub.1-y B".sub.y O.sub.3, wherein when A' is Sr; A" is one or more of Ba, La, Y, Ca and Na, and when A' is Ba, A" is one or more of Sr, La, Y, Ca and Na, B' is Ru and B" is one or more of Ti, Cd, Zr, V and Co, O<x<0.2; 0<y<0.2, (2) 5 to 30 weight % of a metallic copper powder, nickel metallic powder or cupric oxide, relative to the total conductive phase weight, andb. a glass phase selected from the group consisting of (a) 40 to 60 mole % SrO or BaO, 25 to 45 mole % B.sub.2 O.sub.3, 0 to 6 mole % ZnO, 0.25 to 2.0 mole % TiO.sub.2, 2 to 14 mole % SiO.sub.2 and (b) 40 to 60 mole % SrO or BaO, 25 to 45 mole % B.sub.2 O.sub.3, 5 to 20 mole % Al.sub.2 O.sub.3, 0.25 to 2.0 mole % TiO.sub.2.

Abstract: To tellurite optical glass comprising TeO.sub.2, high valence components are added and may be a combination of La.sub.2 O.sub.3, at least one of B.sub.2 O.sub.3 and GeO.sub.2, and at least one of Ta.sub.2 O.sub.5 and Nb.sub.2 O.sub.5. The high valence components may include Y.sub.2 O.sub.3, Gd.sub.2 O.sub.3, and Yb.sub.2 O.sub.3. Amounts of TeO.sub.2 and La.sub.2 O.sub.3 are restricted to ranges between 10% and 80% and between 5% and 35%, respectively. A sum of B.sub.2 O.sub.3 and GeO.sub.2 must fall within a range between 1% and 30%, with an amount of GeO.sub.2 restricted between 0% and 22%. A total of La.sub.2 O.sub.3, Y.sub.2 O.sub.3, Gd.sub.2 O.sub.3, and Yb.sub.2 O.sub.3 must be between 5% and 50%. A sum of Ta.sub.2 O.sub.5 and Nb.sub.2 O.sub.5 should range from 1% to 26%, with individual amounts of Ta.sub.2 O.sub.5 and Nb.sub.2 O.sub.5 kept between 0% and 20% and between 0% and 26%, respectively.

Abstract: A process is disclosed for volume reduction and solidification of a radioactive waste solution mainly composed of sodium borate and discharged from a pressurized water reactor. The process comprises adding to said radioactive waste solution, ZnO or a mixture of ZnO with Al.sub.2 O.sub.3 and/or CaO, and then subjecting the resulting mixture to dehydration and melting to produce a vitrified solid solution. Said process is safe and reliable. A vitrified solid solution produced by said process is safe and stable.

Abstract: Use of borax in the removal of and/or to prevent the build-up of slag on heat transfer surfaces in glass manufacture and allied industries. The borax may be used in association with a minor amount of a transition metal acetylacetonate. The borax is preferably applied directly onto the heat recuperator tubes.

Abstract: A glass for an eye glass lens comprising a SiO.sub.2 (or B.sub.2 O.sub.3)-CaO-Nb.sub.2 O.sub.5 system as a basic system and having a refractive index of 1.79 or more, an Abbe number of 32 to 38 and a specific gravity of less than 3.6 is disclosed.

Abstract: Sodium resistant sealing glasses have aluminoborate glass compositions in which glass stability is improved by the incorporation of specific mixtures of modifying alkali earth oxides of calcium oxide, strontium oxide and barium oxide. These modifying alkali earth oxides are present in a total weight percent range from 15 to 40 weight percent of the glass composition.Also disclosed is the employment of the above glasses as seals in sodium-sulfur cells.