Abstract: The present invention relates to a glass frit and a sealing method for an electric element using the same, and more particularly, to a glass frit which provides a good sealing effect to moisture and gas and is processable at low temperatures, and a sealing method for an electric element using the same.

Abstract: An optical glass has a composition including: 40 to 65 mass % of P2O5, and 0 to less than 5 mass % of Li2O+Na2O+K2O. In the optical glass, (MgO+CaO)/(Li2O+Na2O+K2O) which is a ratio of the total content expressed in mass % of MgO and CaO to the total content expressed in mass % of Li2O, Na2O, and K2O, is in a range from 6 to 38.

Abstract: An optical glass having a refractive index (nd) within a range from 141 to 1.47 and an Abbe number (?d) within a range from 90 to 100 comprises in mass % on element basis: P ?0.1-5.0% Al ?1.0-20.0% F 30.0-60.0% and O ?1.0-20.0% and comprises, as an essential component, one or more elements selected from the group consisting of Ca, Sr and Ba. In this optical glass, the ratio (Si+B+P+Al)/F is within a range from 0.15 to 0.40.

Abstract: A glass material for mold pressing, comprised of a core portion comprised of a multicomponent optical glass containing at least one readily reducible component selected from among W, Ti, Bi, and Nb, and a covering portion covering the surface of said core portion, comprised of a multicomponent glass containing none or a lower quantity of said readily reducible component than is contained in said core portion. A glass material for mold pressing comprising a core portion comprised of a fluorine-containing multicomponent optical glass and a covering portion covering the surface of said core portion, comprised of a multicomponent glass containing none or a lower quantity of fluorine than is contained in said core portion. A method for manufacturing an optical glass element comprising heat softening a glass material that has been preformed into a prescribed shape, and conducting press molding with a pressing mold, employing the above glass material of the invention.

Abstract: The present invention relates to an optical glass containing, in terms of mass % on an oxide basis, P2O5: from 10 to 18%; Bi2O3: from 37 to 64%; Nb2O5: from 5 to 25%; Na2O: from more than 4.1 to 10%; K2O: from 0 to 2%; Li2O: from 0 to 0.2%; WO3: from 0 to less than 20%; TiO2: from 0 to 3%; and B2O3: from 0 to 2%, and having a refractive index nd of 1.98 or more and an Abbe's number ?d of 20 or less.

Abstract: To provide glass with which a sealing treatment can be carried out at a temperature of at most 400° C. and which does not deteriorate or change in quality for a long time. Glass comprising, as represented by mol % based on oxides, from 27 to 33% of P2O5, from 50 to 70% of SnO, from 0 to 10% of ZnO, from 0.5 to 5% of CaO and from 0 to 5% of B2O3.

Abstract: The optical glass comprises equal to or greater than 5 mole percent of P2O5, has an Abbé number of equal to or greater than 58 and a glass transition temperature of equal to or less than 570 degree Celsius, and has an alkalinity resistance defined as a rate of weight reduction of equal to or less than 17 micrograms/(cm2·hour) when the surface of said optical glass which has been optically polished is immersed in 0.01 mole/liter of NaOH aqueous solution at 50 degree Celsius.

Abstract: Provided is an optical glass having high refractivity and high dispersibility, having good moldability in precision pressing, and having high transmittance and good internal quality, of which the transmittance reduction with time is prevented. The optical glass has a Pt content of at most 1.5 ppm, and is characterized in that, when a sample of the glass polished on both surfaces and having a thickness of 10 mm is irradiated with UV and/or visible light at a light-receiving energy of at most 0.4 mW·cm?2 for at least 200 hours, then the difference in the internal transmittance to light having a wavelength of 420 nm, before and after the irradiation (before irradiation—after irradiation) of the sample, as calculated in terms of the sample having a thickness of 10 mm, is at most 0.1.

Abstract: Disclosed are glass materials generally belonging to the P2O5—ZnO—TeO2 system and process for making the same. The glass may comprise Bi2O3 as well. The high refractive index and low Tg materials are particularly suitable for refractive lens elements for use in portable optical devices. The process involves the use of P2O5 source materials with reduced amounts of reducing agents or a step of removing the reducing agents from such source materials by an oxidizing step such as calcination.

Abstract: A zinc and bismuth containing, water-soluble glass composition comprising from 10 to 75 mole % P2O5, 5-50 mole % alkali metal oxide, up to 40 mole % ZnO and up to 40 mole % Bi2O3.

Abstract: Optical glass having a refractive index (nd) of 1.75 or greater, and an Abbe number (?d) falling within the range of 15 to 40, which is suitable for molding by precision mold press is provided. The optical glass is characterized by including B2O3+SiO2 in an amount of 10 to 70%, Bi2O3 in an amount of 5% or more and less than 25%, RO+Rn2O in an amount of 5 to 60% (wherein R represents one or more selected from a group consisting of Zn, Ba, Sr, Ca, and Mg; and Rn represents one or more selected from a group consisting of Li, Na, K, and Cs), with each component in the range expressed in oxide-based mole, and is characterized in that transparency in the visible region is high, and that the transition point (Tg) is 520° C. or lower. The optical glass is characterized by having a spectral transmittance of 70% or greater at a wavelength of 550 nm, for a thickness of 10 mm.

Abstract: A modified alkali silicate composition for forming an inorganic network matrix. The modified alkali silicate matrix is made by reacting an alkali silicate (or its precursors such as an alkali hydroxide, a SiO2 source and water), an acidic inorganic composition, such as a reactive glass, water and optional fillers, additives and processing aids. An inorganic matrix composite can be prepared by applying a slurry of the modified aqueous alkali silicate composition to a reinforcing medium and applying the temperature and pressure necessary to consolidate the desired form. The composite can be shaped by compression molding as well as other known fabrication methods. A notable aspect of the invention is that, although composite and neat resin components prepared from the invention can exhibit excellent dimensional stability to 1000° C. and higher, they can be prepared at the lower temperatures and pressures typical to organic polymer processing.

Abstract: A phosphate glass comprising: (i) 45 to 75 mole % P2O5; (ii) 0.5 to 30 mole % of at least one material selected from the group consisting of: Li2O, B2O3, CdO, Gd2O3; (iii) 1 to 25 mole % Al2O3; (iv) 0.25 to 15 mole % Ce2O3; and (v) at least 0.25 mole % SnO and/or Sb2O3.

Abstract: The invention provides an antimicrobial phosphate glass composition including, in weight percent based on oxide: greater than 45 to 90 of P2O5, 0 to 60 of B2O3, 0 to 40 of SiO2, 0 to 20 weight percent of Al2O3, 0 to 30 of SO3, 0 to 0.1 of Li2O, 0 to 0.1 of Na2O, 0 to 0.1 of K2O, 0 to 40 of CaO, 0 to 40 of MgO, 0 to 15 of SrO, 0 to 40 of BaO, 0 to 40 of ZnO, 0 to 5 of Ag2O, 0 to 15 of CuO, 0 to 10 of Cr2O3, 0 to 10 of I—, 0 to 10 of TeO2, 0 to 10 of GeO2, 0 to 10 of TiO2, 0 to 10 of ZrO2, 0 to 10 of La2O3, 0 to 5 of Nb2O3, 0 to 5 of CeO2, 0 to 5 of Fe2O3, 0 to 5 of WO3, 0 to 5 of Bi2O3, and 0 to 5 of MoO3.

Abstract: A glass composition consisting essentially of, based on mole percent, 46-56% B2O3, 0.5-8.5% P2O5, SiO2 and mixtures thereof, 20-50% CaO, 2-15% Ln2O3 where Ln is selected from the group consisting of rare earth elements and mixtures thereof; 0-6% M?2O where M? is selected from the group consisting of alkali elements; and 0-10% Al2O3, with the proviso that the composition is water millable.

Abstract: A glass-covered light-emitting element and a glass-covered light-emitting device are provided, which are covered with a glass having a low glass transition point and a thermal expansion coefficient close to that of the light-emitting element. The glass-covered light-emitting element includes a semiconductor light-emitting element having a principal surface, and a P2O5—ZnO—SnO type glass covering the principal surface of the semiconductor light-emitting element, and the glass consists essentially of, as represented by mol % based on the following oxides, from 20 to 45% of P2O5, from 20 to 50% of ZnO and from 20 to 40% of SnO, and the glass has a glass transition point of at least 290° C. and at most 450° C., and a thermal expansion coefficient of at most 105×10?7/° C.

Abstract: A low dispersion optical glass comprising, given as molar percentages, 28 to 50 percent of P2O5; more than 20 percent but not more than 50 percent of BaO; 1 to 20 percent MgO; a sum of Li2O, Na2O, and K2O exceeding 3 percent (with 0 to 25 percent of Li2O, greater than or equal to 0 percent and less than 10 percent of Na2O, and 0 to 12 percent of K2O); more than 0 percent but not more than 15 percent of ZnO; 0 to 25 percent of B2O3; 0 to 5 percent of A12O3; 0 to 8 percent of Gd2O3; 0 to 20 percent of CaO; 0 to 15 percent of SrO; and 0 to 1 percent of Sb2O3; with a sum of oxide contents of P, Ba, Mg, Li, Na, K, Zn, B, Al, Gd, Ca, Sr, and Sb being greater than or equal to 98 percent. The optical glass comprises no La2O3. The press molding preform is comprised of the optical glass.

Abstract: An optical glass includes, based on the total weight of the optical glass: not less than 35 weight percent and less than 45 weight percent of P2O5; not less than 0.5 weight percent and less than 10 weight percent of B2O3; 0 to 16 weight percent of Al2O3; 0 to 2.5 weight percent of SiO2; 0 to 26 weight percent of BaO; 0 to 20 weight percent of SrO; 23 to 49 weight percent of ZnO; more than 6 weight percent and not more than 20 weight percent of CaO; 0 to 16 weight percent of MgO; not less than 0 weight percent and less than 1 weight percent of Li2O; 3 to 19 weight percent of Na2O; and 0 to 20 weight percent of K2O, where the total weight of BaO, SrO, ZnO, CaO, and MgO and the total weight of Li2O, Na2O and are predetermined amounts.

Abstract: A substantially alkaline resistant calcium-iron-phosphate (CFP) glass and methods of making and using thereof. In one application, the CFP glass is drawn into a fiber and dispersed in cement to produce glass fiber reinforced concrete (GFRC) articles having the high compressive strength of concrete with the high impact, flexural and tensile strength associated with glass fibers.

Abstract: A glass material for mold pressing, comprising a core portion comprised of an optical glass with a degree of abrasion FA of 200 or higher and a covering portion comprised of a second glass covering at least a portion of the surface of said core portion. A method for manufacturing an optical glass element, wherein a glass material that has been preformed to a prescribed shape is heat softened and press molded with a pressing mold and the outer perimeter portion of the molded product obtained is removed by mechanical processing. The above-mentioned glass material for mold pressing is used as the glass material. To provide a means whereby an optical element does not bear scratches on optically functional surfaces through contact during handling after the press molding of press molded glass products despite being comprised of a glass material with a high degree of abrasion, and a means whereby even when scratched, the function of the optical element finally obtained is unaffected.

Abstract: The present application provides dental compositions, and methods of making and using dental compositions that include a calcium and phosphorus releasing glass. Such dental compositions can be useful for delivering ions to the oral environment.

Abstract: A precision press-molding preform for producing an optical element for use in an imaging device using a CCD type or MOS type solid image-sensing device, which is formed of a glass composition containing, by mol %, 25 to 45% of P2O5, 0.5 to 10% of CuO, 0 to 10% of B2O3, 0 to 10% of Al2O3, 2 to 30% of Li2O, 0 to 25% of Na2O, 0 to 15% of K2O, the total content of Li2O, Na2O and K2O being 3 to 40%, 3 to 45% of BaO, 0 to 30% of ZnO, 0 to 20% of MgO, 0 to 20% of CaO, 0 to 20% of SrO, 0 to 10% of Bi2O3, 0 to 5% of La2O3, 0 to 5% of Gd2O3 and 0 to 5% of Y2O3, the total content of these components being at least 98%, and a precision press-molding preform, which is formed of a phosphate glass containing CuO, an alkali metal oxide, BaO and ZnO and having a BaO content/ZnO content molar ratio (BaO/ZnO) of greater than 1.

Abstract: An optical glass that has high-refractivity and high-dispersion properties, that is less colored and that is suitable for a shapable glass material for press-shaping and various optical elements, the optical glass containing, as glass components and by mass %, 10 to 32% of P2O5, 27 to 65% of Nb2O5, 10 to 30% of BaO, 0 to 12% of B2O3, more than 0% but not more than 20% of TiO2, more than 0% but not more than 10% of total of Li2O, Na2O and K2O, and more than 0% but not more than 1%, based on the total content of the said glass components, of Sb2O3, and having a light transmittance that is 50% at a wavelength of 420 nm or shorter.

Abstract: Phosphate optical glass having an Abbé number, ?d, of greater than 59. A preform for precision press molding being comprised of the phosphate optical glass. An optical glass being comprised of the phosphate optical glass and manufacturing method of the same. Provided are low-dispersion phosphate optical glass having a low-temperature softening property and good weatherability, suited to precision press molding, and further having good devitrification stability, a preform for precision press molding comprised of the above glass and a method of manufacturing of the same, a glass optical element having the above optical characteristics as well as good weatherability and a method of manufacturing the same.

Abstract: A low-dispersion optical glass suitable for producing a quality preform from a molten glass and suitable for precision press-molding, which is a fluorophosphate glass containing, as essential cationic components, P5+, Al3+, at least two members selected from Mg2+, Ca2+, Sr2+ and Ba2+ as divalent cationic components (R2+) and Li+ and containing, by cationic %, 10 to 45% of P5+, 5 to 30% of Al3+, 0 to 20% of Mg2+, 0 to 25% of Ca2+, 0 to 30% of Sr2+, 0 to 33% of Ba2+, 1 to 30% of Li+, 0 to 10% of Na+, 0 to 10% of K+, 0 to 5% of Y3+, and 0 to 15% of B3+, the molar ratio of the content of F? to the total content of F? and O2?, F?/(F?+O2?), being 0.25 to 0.85, the optical glass having a refractive index (Nd) of 1.40 to 1.58 and an Abbe's number (?d) of 67 to 90.

Abstract: A zinc and bismuth containing, water-soluble glass composition comprising from 10 to 75 mole % P205, 5-50 mole % alkali metal oxide, up to 40 mole % Zn0 and up to 40 mole % Bi203.

Abstract: The object of the present invention is to provide an optical glass which has optical constants such as a refractive index of from 1.45 to 1.65 and an Abbe number of at least 65 and which is yet excellent in chemical durability. A phosphate optical glass comprising, as glass components by mass %, from 73 to 85 of P2O5, from 14 to 26 of Al2O3, from 1 to 12 of K2O+Li2O, from 0 to 12 of SiO2, from 0 to 12 of B2O3, from 0 to 12 of Na2O, from 0 to 12 of Y2O3, from 0 to 12 of La2O3, from 0 to 12 of MgO+CaO+SrO+BaO, from 0 to 10 of ZrO2+TiO2+Gd2O3, from 0 to 10 of Ta2O5+GeO2+Ga2O3+Nb2O5+WO3+TeO2, from 0 to 2 of Sb2O3, and from 0 to 12 of ZnO+PbO.

Abstract: An optical glass has optical constants represented by a refractive index (nd) of 1.46 to 1.58 and an Abbe's number (?d) of 65 to 74, has excellent hot preform shapeability, low softenability and excellent climate resistance, and comprises, by mol %, 45 to 65% of P2O5, 8 to 19% of Al2O3, 5 to 30% of MgO, 1 to 25% of a total of Li2O, Na2O and K2O, 0 to 16% of B2O3, 0 to 25% of ZnO, 0 to 25% of CaO, 0 to 25% of SrO, 0 to 30% of BaO, 0 to 10% of La2O3, 0 to 10% of Gd2O3, 0 to 10% of Y2O3, 0 to 10% of Yb2O3 and 0 to 10% of Lu2O3, and the total content of the above components of the optical glass is at least 95%.

Abstract: A new ytterbium-phosphate glass and a method for producing the same are disclosed. The glass finds special use in forming laser glass. Previously the level of ytterbium that could be incorporated into a phosphate glass without leading to formation of crystals or devitrification was limited. It has been found that much higher levels of ytterbium can be incorporated if an initial glass melt is formed from phosphate and ytterbium prior to adding the other components. Using the present process ytterbium-phosphate glasses having up to 30 mole percent ytterbium can be created. The new glasses function as well and often better than previous ytterbium containing glasses as laser glasses especially when combined with one or more of the lasing ions erbium oxide, neodymium oxide, holmium oxide or thulium oxide.

Abstract: There is described a biodegradable composite material for tissue repair comprising a water-soluble glass, preferably as glass fibers and/or particles in the form of a matrix, impregnated with a biodegradable polymer. An especially preferred polymer is poly ?-caprolactone. The biodegradable composite is particularly useful for the repair of nerve and/or bone tissue, especially the bones of the skull. A method of producing the composite material is also described.

Abstract: Disclosed is an optical glass having high-refractivity and high-dispersion properties and having little coloring, said glass containing P2O5, Nb2O5 and TiO2 as glass components, containing Sb2O3 in an amount of over 0% by weight but not more than 1% by weight based on the total content of the glass components excluding Sb2O3, having a refractive index (nd) of 1.91 or more and an Abbe's number (?d) of 21 or less and having a light transmittance that comes to be 70% at a wavelength of 500 nm or less.

Abstract: A glass composition consisting essentially of, based on mole percent, 46-56% B2O3, 0.5-8.5% P2O5, SiO2 and mixtures thereof, 20-50% CaO, 2-15% Ln2O3 where Ln is selected from the group consisting of rare earth elements and mixtures thereof; 0-6% M?2O where M? is selected from the group consisting of alkali elements; and 0-10% Al2O3, with the proviso that the composition is water millable.

Abstract: The invention discloses a standard for referencing luminescence signals, having an optically transparent base material comprising a lanthanum phosphate glass, a fluorophosphate glass, a fluor-crown glass, a lanthanum glass, a glass-ceramic formed therefrom or a lithium aluminosilicate glass-ceramic, the base material including a bulk doping with at least one constituent which is luminescent and comprises at least one rare earth and/or a nonferrous metal, in particular cobalt, chromium or manganese.

Abstract: A method of making a glass-ceramic from at least two different metal oxides is disclosed. The method includes providing the two different metal oxides as a glass, heating the glass above the glass transition temperature of the glass to form a coalesced shape; and heating the coalesced shape to a temperature above the crystallization onset temperature of the glass, thereby forming a glass-ceramic comprising at least 1% by volume crystallites, wherein the crystallites have an average size of less than 1 micrometer. The difference between the glass transition temperature and the crystallization onset temperature is at least 25K.

Abstract: A method of making an article from an aluminum oxide glass is disclosed. The aluminum oxide glass includes zirconium oxide and either calcium oxide or strontium oxide. The aluminum oxide glass has a glass transition temperature and a crystallization temperature, and these temperatures differ by at least 25K. The method includes: providing a glass in a form comprising particles, beads, microspheres, or fibers; heating the glass above the Tg such that the particles, beads, microspheres, or fibers coalesce to form a coalesced shape; and cooling the coalesced shape to form the article.

Abstract: A glass powder having an average particle size of at least 0.5 ?m and smaller than 5.0 ?m, having a specific surface area of at least 1.5 m2/cm3, and having a glass transition temperature higher than 200° C. and lower than 400° C.

Abstract: An adhesive agent for fluorescent dyes for adhering a fluorescent layer on a substrate, wherein the adhesive agent contains or consists of a glass composition.

Abstract: A glass composition satisfying the following conditions (A) to (L), the conditions are: (A) a content ratio of TeO2 is in a range from 50 to 95 mol %; (B) a content ratio of B2O3 is in a range from 1 to 33 mol %; (C) a content ratio of ZnO is in a range from 1 to 37 mol %; (D) a content ratio of Bi2O3 is in a range from 1 to 18 mol %; (E) a content ratio of P2O5 is in a range from 0 to 15 mol %; (F) a content ratio of R2O (where R represents at least one element selected from the group consisting of Li, Na, and K) is in a range from 0 to 13 mol %; (G) a content ratio of MO (where M represents at least one element selected from the group consisting of Mg, Ca, Sr, and Ba) is in a range from 0 to 13 mol %; (H) a content ratio of TiO2 is in a range from 0 to 13 mol %; (I) a content ratio of Nb2O5 is in a range from 0 to 10 mol %; (J) a content ratio of Ta2O5 is in a range from 0 to 13 mol %; (K) a content ratio of L2O3 (where L represents at least one element selected from the group consisting of yttrium and lant

Abstract: A zinc-containing, water-soluble glass composition comprising from 41 to 54 mole % of P2O5, 10 to 30 mole % of alkali oxides, up to 5 mole % of SO3 and up to 25 mole % of ZnO.

Abstract: An optical glass having a high refractive index and high dispersion characteristics that is suited to application to precision press molding to precisely mold the shape of final products for objectives not requiring grinding or polishing. An optical glass exhibiting a refractive index in the range of from 1.75 to 2.0, an Abbé number in the range of from 20 to 28.5. Optical parts comprised of this glass; press-molding materials comprised of this glass; methods of manufacturing the same; and methods of manufacturing molded glass products employing these materials.

Abstract: The invention is directed to lead-free glass frit compositions that can be used as sealing frits, the compositions being a blend of: (1) at least one of two glass families which are SnO—ZnO—P2O5 and alkali-ZnO—P2O5 glasses; and (2) at least one cerammed filler material having a crystalline phase selected from the group consisting of beta-quartz, beta-eucryptite, cordierite, and beta-spodumene. The blends of the invention have flow characteristics that enable them to be used at sealing temperatures in the range of 450-550° C., and a CTE value in the range of 60-90×10?7/° C.

Abstract: Disclosed are zinc niobium phosphate glasses consisting essentially, expressed in terms of mole percent on the oxide basis of, 40-65% P2O5, 25-37% ZnO, 0.1-15% Nb2O5, 0-6% Al2O3, 0-5% Bi2O3, 0-3% Na2O and 0-5% B2O3, said glass exhibiting glass transition temperature below 450° C., a dilatometer softening point below 500° C., coefficient of expansion in the range of 80-120×10?7° C.?1, good chemical durability and blue color. The glass of the present invention is useful for sealing optical fiber to ferrule by local heating.

Abstract: An optical glass comprising in mass %: P2O5 25%-less than 45% B2O3 6-20% BaO 24%-less than 40% ZnO 3-14% MgO 0-15% CaO 0-15% SrO 0-15% Li2O 0-5% Na2O 0-5% K2O 0-5% WO3 0-5% and Al2O3 0-5%. The optical glass should preferably contain 0.1-5% WO3, 3.6-15% MgO, 0.1-5% Li2O+Na2O+K2O, 0—less than 0.5% and Sb2O3+As2O3 with the mass ratio of ZnO/BaO being 0.12—less than 0.50. The optical glass should preferably have refractive index (nd) within a range from 1.54 to 1.65 and Abbe number (?d) within a range exceeding 57 up to 69 and liquid phase temperature within a range from 870° C. to 930° C. There is provided an optical glass having high resistance to devitrification and medium refractive index and low dispersion characteristics which is free of ingredients such as Ta2O5 having a high cost of raw material and therefore can be manufactured at a relatively low cost of raw materials.

Abstract: The object of the present invention is to provide an optical glass which has optical constants such as a refractive index of from 1.45 to 1.65 and an Abbe number of at least 65 and which is yet excellent in chemical durability. A phosphate optical glass comprising, as glass components by mass %, from 73 to 85 of P2O5, from 14 to 26 of Al2O3, from 1 to 12 of K2O+Li2O, from 0 to 12 of SiO2, from 0 to 12 of B2O3, from 0 to 12 of Na2O, from 0 to 12 of Y2O3, from 0 to 12 of La2O3, from 0 to 12 of MgO+CaO+SrO+BaO, from 0 to 10 of ZrO2+TiO2+Gd2O3, from 0 to 10 of Ta2O5+GeO2+Ga2O3+Nb2O5+WO3+TeO2, from 0 to 2 of Sb2O3, and from 0 to 12 of ZnO+PbO.

Abstract: A precision press-molding preform for producing an optical element for use in an imaging device using a CCD type or MOS type solid image-sensing device, which is formed of a glass composition containing, by mol %, 25 to 45% of P2O5, 0.5 to 10% of CuO, 0 to 10% of B2O3, 0 to 10% of Al2O3, 2 to 30% of Li2O, 0 to 25% of Na2O, 0 to 15% of K2O, the total content of Li2O, Na2O and K2O being 3 to 40%, 3 to 45% of BaO, 0 to 30% of ZnO, 0 to 20% of MgO, 0 to 20% of CaO, 0 to 20% of SrO, 0 to 10% of Bi2O3, 0 to 5% of La2O3, 0 to 5% of Gd2O3 and 0 to 5% of Y2O3, the total content of these components being at least 98%, and a precision press-molding preform, which is formed of a phosphate glass containing CuO, an alkali metal oxide, BaO and ZnO and having a BaO content/ZnO content molar ratio (BaO/ZnO) of greater than 1.

Abstract: A glass containing 5 to 25 mass % of P2O5, 0 to 15 mass % of B2O3, 0 to 5 mass % of SiO2+GeO2, 21 to 50 mass % of BaO+SrO, 0 to 3 mass % of Li2O+Na2O+K2O, and 35 to 65 mass % of Nb2O5, not substantially containing PbO, satisfying Nb2O5/(BaO+SrO)=0.85 to 2.20, having a dielectric constant of 15 or greater, a dielectric loss of 10.0×10?4 or less, and a resistivity of 1.0×1016 ?·cm or more.

Abstract: The lead-free, preferably lithium-free, optical glass is useful in imaging, projection, telecommunications, optical communication and/or laser technology, particularly for making precise-pressed optical elements. It has a refractive index nd of 1.50 to 1.57, an Abbé number ?d of 61 to 70. It also has a low transformation temperature of about or below 400° C., good production and processing properties and crystallization resistance. It has a composition, in percent by weight, based on oxide content of P2O5, 40 to 60; Al2O3, 1 to 20; B2O3, 0 to <5; Na2O, 0 to 30; K2O, 0 to 30; Li2O, 0 to <1; ?M2O, >15 to 40; BaO, 1 to 20; ZnO, 1 to 20; SrO, 0 to 5; CaO, 0 to 5; MgO, 0 to 5; and ?MO, 5 to 25. In addition, it may contain standard refining agents, although it is preferably free of arsenic and fluorine.

Abstract: A zinc-containing, water-soluble glass composition comprising from 41 to 54 mole % of P2O5, 10 to 30 mole % of alkali oxides, up to 5 mole % of SO3 and up to 25 mole % of ZnO.

Abstract: The present invention relates to lead and fluorine and preferably lithium free optical glasses for the application areas imaging, projection, telecommunications optical communications engineering, mobile drive and/or laser technology with a refractive index of from 1.60?nd?1.64 and an Abbe number of from 56??d?64, which glasses have a low transformation temperature, namely less than or equal to 590° C., preferably less than or equal to 585° C., more preferred less than or equal to 570° C., which glasses can still further be produced and handled easily and are stable to crystallization. The glasses according to the invention with the following composition (in weight-% based on the oxides) comprise the following components: P2O5 26-35 B2O3 10-15 Al2O3 5.5-10? BaO 25-37 SrO 0-6 CaO ?8-15 ZnO ?3-10 Bi2O3 0-8 Na2O 0-2 K2O 0-2 WO3 ?0-10 La2O3 0-2 Nb2O5 0-1 TiO2 ??0-<1 ?earth alkali oxides ?40 ?alkali oxides 0-2 common refining agents ??0-0.

Abstract: This invention is related to thick film conductor compositions comprising electrically conductive gold powder, one or more glass frit or ceramic oxide compositions and an organic vehicle. It is further directed to the composition's uses for LTCC (low temperature co-fired ceramic) tape, for fabrication of multilayer electronic circuits and in high frequency microelectronic applications.