Abstract: The present invention is directed to the preparation of frit pastes suitable for sealing together preformed glass parts, being especially suitable for sealing glass panels to funnels of cathode ray tubes. The pastes comprise a mixture of frit particles, a lacquer, and at least one additive in an amount of 0.0005-2% by weight total of the lacquer. The preferred additives are selected from the group of alkyl organic phosphate esters, a mixed titanium ortho ester complexes, and substituted sorbitols in the polyol acetal family.

Abstract: A paint composition containing as a major portion a flux composition including a first flux containing silica, alkali oxide, zinc oxide and boron oxide but containing no lead or lithium and optionally a second flux, and minor portions of pigment and a liquid medium, particularly suited for automobile windshields.

Abstract: A glass composition, containing barium oxide, which provides a source of leachable fluoride and which can be incorporated into a dental cement composition which, when cured, is radiopaque and translucent.

Abstract: Lead-free ceramic frits for producing glazes with intrinsic opacity, and methods of coationg ceramic substrates with the ceramic frits, wherein the ceramic frits have the following composition:______________________________________ SiO.sub.2 48-60 wt. % B.sub.2 O.sub.3 3-8 wt. % Al.sub.2 O.sub.3 4-8 wt. % Na.sub.2 O 0.2-2.0 wt. % K.sub.2 O 4-8 wt. % MgO 0-2 wt. % CaO 7.5-13 wt. % BaO 0-5 wt. % ZnO 7-12 wt. % ZrO.sub.2 0.3-2.5 wt. % TiO.sub.2 3.5-5.5 wt. % P.sub.2 O.sub.5 0-3 wt. % and Na.sub.2 O + K.sub.2 O 4.5-8.5 wt. %.

Abstract: Zinc-containing, lead- and cadmium-free glass frits with a softening point of less than 510.degree. C. are disclosed. Obligatory components of the glass-frit composition are 31-50 mole % ZnO, 10-44 mole % SiO.sub.2, 11-35 mole % B.sub.2 O.sub.3 and 11-25 mole % Na.sub.2 O. The glass frits can be used as base frit for the production of decorative coating masses which can be stoved below 630.degree. C., preferably masses for the decorating of glass.

Abstract: Glaze composition comprises 45 to 75% of SioO.sub.2, 0.1 to below 5% of Bi.sub.2 O.sub.3, 0.1 to 20% of Al.sub.2 O.sub.3 to 20% of B.sub.2 O.sub.3, at least one of CaO, MgO, SrO, BaO or Zno in an amount of 2 to 22%, at least one of Li.sub.2 O, Na.sub.2 O, K.sub.2 O in an amount of 1 to 10%, at least one of La.sub.2 O.sub.3, MoO.sub.3 or WO.sub.3 in an amount of 0.1 to 10% and certain other optional ingredients, all percentages being percentages by weight based on the total weight of the glaze composition, the glaze composition having a firing temperature of 950.degree. to 1250.degree. C., and having a coefficient of thermal expansion of 50 to 100.times.10.sup.-7 /.degree.C.

Abstract: A frit composition for ceramic glazes is disclosed which is free of lead, cadmium and also barium. The composition contains SiO.sub.2, B.sub.2 O.sub.3, Al.sub.2 O.sub.3, alkali metal oxide, CaO, ZnO, and optionally MgO, SrO, TiO.sub.2, Bi.sub.2 O.sub.3, P.sub.2 O.sub.5 or ZrO.sub.2.

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: Enamel frit powder for electrostatic application with a surface resistance greater than 10.sup.16 ohms containing alkaline oxides and alkaline oxides wherein the weight ratio of the alkaline oxides Na.sub.2 O:K.sub.2 O and the weight ratio of the alkaline earth oxides CaO:BaO is each about 1:1, containing______________________________________ % by weight ______________________________________ SiO.sub.2 36-40 Al.sub.2 O.sub.3 0-4 B.sub.2 O.sub.3 12-16 Na.sub.2 O 7-9 K.sub.2 O 7-9 ZrO.sub.2 5-10 CaO 4-6 BaO 4-6 P.sub.2 O.sub.5 0-1 CoO 1 NiO 2 MnO 0-2 CuO 0-2 F 0.1.

Abstract: A glass flux composition consisting essentially by weight of 30-70% SiO.sub.2, 10-30% CaO, 0-20% ZnO, 3-8% MoO.sub.3, 0-20% B.sub.2 O.sub.3, 0-25% Al.sub.2 O.sub.3, 0-10% K.sub.2 O, 0-10% Na.sub.2 O, 0-10% MgO, 0-15% BaO, 0-7% Li.sub.2 O, 0-10% PbO, 014 5% SrO, 0-10% CeO, 0-0.1% CoO and 0-5% P.sub.2 O.sub.5 is a useful opacifying composition for preparing a glaze composition for ceramics.

Abstract: An improved sliver-glass paste for bonding a semiconductive element to a substrate comprising silver flake, glass frit, a surfactant, a thixotrope and a low boiling paraffinic hydrocarbon solvent.

Abstract: An improved silver-glass paste for bonding a semiconductive element to a substrate comprising a metal resinate. A surfactant containing lyophilic and lyophobic groups may also be included.

Abstract: Fluorine-free titanium white enamel frits for enamelling steel consisting essentially of:35 to 45 parts by weight of the sum of SiO.sub.2 and ZrO.sub.2,18 to 22 parts by weight of TiO.sub.2,18 to 22 parts by weight of the sum of B.sub.2 O.sub.3 and Al.sub.2 O.sub.3,15 to 18 parts by weight of alkali metal oxides,2.5 to 4.5 parts by weight of P.sub.2 O.sub.5, and0.8 to 1.4 parts by weight alkaline earth metal oxides;with the proviso that the ratio of atomic numbers is as follows:(A+2B) to C is 0.9.+-.0.05,(lithium+0.5 magnesium) to phosphorous is 1.+-.0.1, and sodium to potassium is 1.2 to 2.6,wherein A is the sum of monovalent atoms, B is the sum of divalent atoms and C is the sum of trivalent atoms.

Abstract: An improved dielectric formulation for the fabrication of multilayer, integrated circuits which comprises a devitrifying zinc-magnesium-barium-aluminum-zirconium-phosphosilicate glass frit, a devitrifying zinc-magnesium-barium-aluminum-silicate glass frit, or a devitrifying zinc-magnesium-strontium-aluminum-silicate glass frit which are stabilized by the presence of from about 0.01 to about 1 weight percent each of lead oxide and iron oxide.

Abstract: A lead-free frit suitable for use on aluminum, consisting essentially of:______________________________________ 33-42 wt. % SiO.sub.2 8-13 TiO.sub.2 0.5-2.5 SnO.sub.2 0.5-2.5 BaO 2.5-5.0 in the absence of Ce.sub.2 O.sub.3 ; 0-4.5 if Ce.sub.2 O.sub.3 is present. SrO 2.2-4.3 ZnO 13-26 Na.sub.2 O 4-9 K.sub.2 O 0.7-6.0 Li.sub.2 O 0.5-4.5 B.sub.2 O.sub.3 1.0-3.5 Sb.sub.2 O.sub.3 0-0.8 Ce.sub.2 O.sub.3 0.5-5.0 P.sub.2 O.sub.5 0.2-1.3 MoO.sub.3 ______________________________________The frit has a fusion temperature below about 1050.degree. F. and displays good qualities of gloss, acid resistance, and adhesion.

Abstract: Disclosed are an adhesive for oxide ceramics, which comprises as its effective ingredient a crystallized glass mainly comprising SiO.sub.2, Al.sub.2 O.sub.3, Li.sub.2 O, MgO and/or ZnO, and TiO.sub.2 and/or ZrO.sub.2, and also a method of bonding oxide ceramics together, which comprises heating oxide ceramics to be bonded together at 1200.degree. to 1600.degree. C. with the adhesive placed between the ceramics.

Abstract: The invention described and claimed in the specification relates to the discovery that effective addition of Fe.sub.2 O.sub.3 to a lead phosphate glass results in a glass having enhanced chemical durability and physical stability, and consists essentially of the glass resulting from melting a mixture consisting essentially of, in weight percent, 40-66 percent PbO, 30-55 percent P.sub.2 O.sub.5 and an effective concentration up to 12 percent Fe.sub.2 O.sub.3.

Abstract: Lead-iron phosphate glasses containing a high level of Fe.sub.2 O.sub.3 for use as a storage medium for high-level radioactive nuclear waste. By combining lead-iron phosphate glass with various types of simulated high-level nuclear waste, a highly corrosion resistant, homogeneous, easily processed glass can be formed. For corroding solutions at 90.degree. C., with solution pH values in the range between 5 and 9, the corrosion rate of the lead-iron phosphate nuclear waste glass is at least 10.sup.2 to 10.sup.3 times lower than the corrosion rate of a comparable borosilicate nuclear waste glass. The presence of Fe.sub.2 O.sub.3 in forming the lead-iron phosphate glass is critical. Lead-iron phosphate nuclear waste glass can be prepared at temperatures as low as 800.degree. C., since they exhibit very low melt viscosities in the 800.degree. to 1050.degree. C. temperature range. These waste-loaded glasses do not readily devitrify at temperatures as high as 550.degree. C.

Abstract: This invention is directed to the production of essentially lead-free glass compositions demonstrating softening points below 500.degree. C. and coefficients of thermal expansion somewhat below 88.times.10.sup.-7 /.degree.C. The glasses consist essentially, in weight percent on the oxide basis, of______________________________________ Li.sub.2 O 1-4 Na.sub.2 O + K.sub.2 O 0-12 ZnO 20-30 CaO 0-7 B.sub.2 O.sub.3 32-42 SrO 0-10 Al.sub.2 O.sub.3 2-5 BaO 0-15 ZrO.sub.2 2-6 CaO + SrO + BaO 0-15 P.sub.2 O.sub.5 6-10 V.sub.2 O.sub.5 0-22 Na.sub.2 O 0-8 Bi.sub.2 O.sub.3 0-16 K.sub.2 O 0-8.40 V.sub.2 O.sub.5 + Bi.sub.2 O.sub.3 5-25 ______________________________________wherein a minimum of 5% V.sub.2 O.sub.5 +Bi.sub.2 O.sub.3 is required in the presence of a least 2% Na.sub.2 O or 5% K.sub.2 O, and a minimum of 9% V.sub.2 O.sub.5 +Bi.sub.2 O.sub.3 is required in the essential absence of Na.sub.2 O or K.sub.2 O, but in the presence of at least 3% CaO or 6% SrO or 9% BaO.

Abstract: A lead phosphate glass to which has been added indium oxide or scandium oe to improve chemical durability and provide a lead phosphate glass with good optical properties.

Abstract: A coating is provided whih substantially lengthens the life of carbon and graphite electrodes used in electrical arc processes for the manufacture of ferrous metals. The coating forms a silica-phosphorus glass upon the electrodes.

Abstract: This invention is directed to the production of glass-ceramic materials designed for application as glazes to low expansion ceramic bodies. The inventive glass-ceramics exhibit average coefficients of thermal expansion (25.degree.-100.degree. C.) of less than -15.times.10.sup.-7 /.degree.C., demonstrate excellent resistance to attack by acids and bases, contain beta-quartz solid solution as the predominant crystal phase, and consist essentially, in weight percent, of______________________________________ SiO.sub.2 50-67 Al.sub.2 O.sub.3 22-32 Li.sub.2 O 4.5-7 TiO.sub.2 and/or ZrO.sub.2 4.

Abstract: A low melting, opaque enamel frit is described, which comprises 30 to 36 wt. % of SiO.sub.2, 15 to 20 wt. % of B.sub.2 O.sub.3, 7 to 9 wt. % of Na.sub.2 O, 5 to 10 wt. % of ZrO.sub.2, 10 to 17 wt. % of TiO.sub.2, 7 to 15 wt. % of K.sub.2 O, 2 to 10 wt. % of F.sub.2 and 0.5 to 2.5 wt. % of P.sub.2 O.sub.5. The total of Na.sub.2 O and K.sub.2 O is in the range of 15 to 20 wt. % and the total of TiO.sub.2 and ZrO.sub.2 is in the range of 15 to 20 wt. %. The ZrO.sub.2 /(TiO.sub.2 +ZrO.sub.2) ratio is in the range of 0.25 to 0.5:1 and the SiO.sub.2 /B.sub.2 O.sub.3 ratio is in the range of 1.5 to 2.4:1. In addition, the Na.sub.2 O/K.sub.2 O ratio is in the range of 0.6 to 1.0:1 and the (Na.sub.2 O+K.sub.2 O)/(TiO.sub.2 +ZrO.sub.2) is in the range of 0.7 to 1.2:1.

Abstract: The chemical durability of alkali phosphate glasses is improved by incorporation of up to 23 weight percent of nitrogen. A typical phosphate glass contains: 10 to 60 mole % of Li.sub.2 O, Na.sub.2 O or K.sub.2 O; 5-40 mole % of BaO or CAO; 0-1 to 10 mole % of Al.sub.2 O.sub.3 ; and 40-70 mole % of P.sub.2 O.sub.5. Nitrides, such as AlN, are the favored additives.

Abstract: A biologically active glass and class-ceramic composition useful for making surgical and dental implants comprising, by mol %,:______________________________________ SiO.sub.2 35.about.60 B.sub.2 O.sub.3 5.about.15 Na.sub.2 O 10.about. 30 CaO 5.about. 40 TiO.sub.2 0.5.about. 10 P.sub.2 O.sub.5 0.about. 15 K.sub.2 O 0.about. 20 Li.sub.2 O 0.about. 10 MgO 0.about. 5 Al.sub.2 O.sub.3 + ZrO.sub.2 + Nb.sub.2 O.sub.5 0.about. 8 La.sub.2 O.sub.3 + Ta.sub.2 O.sub.5 + Y.sub.2 O.sub.3 0.about.8 and F.sub.2 0.about.15.

Abstract: A copper phosphate water soluble glass composition. The composition of the glass may be adjusted so as to release copper at a uniform preselected rate and to produce a desired pH in the resultant solution. In one application of the glass copper may be supplied to an animal from an implant formed from a cupric oxide/phosphorus pentoxide glass which also incorporates one or more glass modifying oxides such as alkali metal oxides and alumina, to control the glass solubility. Suitable glasses comprise 5-55 mole % cupric oxide + alkali metal oxides. 45-75 mole % phosphorus pentoxide, and not more than 15 mole % alumina, where the copper oxide concentration is not less than 5 mole %.

Abstract: A process for producing feldspathic sanitary ware and the end product are disclosed in which a fluxing amount of a glass frit is used in the ceramic slip used to cast the sanitary ware. The frit contains both deflocculent oxides and flocculent alkaline earths which are leachable from the frit when it is placed in the ceramic slip. The deflocculent oxides counterbalance the effect of the flocculent alkaline earths to the extent they are respectively leached from the frit upon dispersal in a ceramic slip and maintain the slip at a workable viscosity. Upon casting and firing the slip, the present frit precipitates fine crystals of diopside having an average particle size of less than one micron which are particularly useful in lowering the firing temperature of feldspathic bodies by promoting the required degree of vitrification at lower temperatures than heretofore possible.

Abstract: A lead-free low-melting frit is made by combining raw materials in amounts such that the product will have a specific oxide analysis, melting the raw materials at a temperature greater than 1000.degree. C. and cooling the thus-formed fused glass in a manner such that a frit is formed. The low-melting frit has the following oxide analysis:7-12.5 parts by weight alkali oxide selected from2-9 parts by weight Na.sub.2 O and 2-7 parts by weight Li.sub.2 O;23-34 parts by weight B.sub.2 O.sub.3 ;2-4 parts by weight Al.sub.2 O.sub.3 ;30-45 parts by weight SiO.sub.2 ;0.75-4 parts by weight F;2-4 parts by weight P.sub.2 O.sub.5 ;4-8 parts by weight ZnO; and2-5 parts by weight TiO.sub.2.These frits are durable, have an incipient fusion point less than about 450.degree. C. and a coefficient of thermal expansion less than 10.times.10.sup.-6 cm/cm/.degree.C. The frits of the present invention are particularly useful as components in vitrifiable glass decorating colors.

Abstract: A porcelain enamel frit for sheet iron ground coat is disclosed, which contains neither fluorine nor fluorine compound, but has excellent firing property, and can be worked into sheet iron enamel having high gloss and adherence and low surface roughness. The frit consists of 100 parts of a main component and 7-42 parts of an auxiliary component, said main component consisting of 30-73 parts of SiO.sub.2 or a mixture of SiO.sub.2 and at least one of TiO.sub.2, ZrO.sub.2 and SnO.sub.2, 8-45 parts of B.sub.2 O.sub.3, and 8-41 parts of Na.sub.2 O or a mixture of Na.sub.2 O and at least one of Li.sub.2 O and K.sub.2 O, and said auxiliary component consisting of not more than 12 parts of Al.sub.2 O.sub.3, 1-22 parts of at least one of CaO, Bao, ZnO, MgO and SrO, from more than 0 part to 7 parts of MoO.sub.3 or a mixture of MoO.sub.3 and at least one of V.sub.2 O.sub.5, P.sub.2 O.sub.5 and Sb.sub.2 O.sub.3, and 0.5-10 parts of at least one of CoO, NiO, CuO, MnO.sub.2 and Fe.sub.2 O.sub.3.

Abstract: An aqueous magnesia slurry for forming an insulative glass coating on silicon steel, wherein a substantial portion of the magnesia is inactive (a citric acid activity greater than 200 seconds), a decomposable phosphate compound is present within the range of 2% to 25% by weight calculated as P.sub.2 O.sub.5, based on the dry weight of magnesia, and the magnesia concentration is at least 0.24 grams per cubic centimeter of slurry. The slurry is stable against settling for up to 10 hours and has a desirable viscosity for coating application by conventional means. From 10% to 100% inactive magnesia may be used with the remainder an active magnesia (citric acid activity of 20 to 40 seconds). Preferred phosphate compounds include monocalcium phosphate monohydrate, water soluble ammonium polyphosphate and dicalcium phosphate dihydrate.

Abstract: A glass composition is disclosed that is useful as a solder glass for sealing components together. However, the glass is also especially adapted for use as an electric resistance film for coating the inner neck or funnel portions of a cathode ray tube to reduce arcing. The glass composition includes primarily the oxides of vanadium and phosphorous with the preferred addition of either zinc oxide or lead oxide. Still other metal oxides may be optionally included such as oxides of barium, antimony, lithium, manganese, silicon, boron, molybdenum and mixtures thereof.

Abstract: A process for producing feldspathic sanitary ware and the end product are disclosed in which a fluxing amount of a glass frit is used in the ceramic slip used to cast the sanitary ware. The frit contains both deflocculent oxides and flocculent alkaline earths which are leachable from the frit when it is placed in the ceramic slip. The deflocculent oxides counterbalance the effect of the flocculent alkaline earths to the extent they are respectively leached from the frit upon dispersal in a ceramic slip and maintain the slip at a workable viscosity. Upon casting and firing the slip, the present frit precipitates fine crystals of diopside having an average particle size of less than one micron which are particularly useful in lowering the firing temperature of feldspathic bodies by promoting the required degree of vitrification at lower temperatures than heretofore possible.

Abstract: Glass compositions in the tin-phosphorus-oxyfluoride composition system exhibiting very low glass transition temperatures and capable of being modified by the addition of selected constituents to exhibit excellent stability in a humid environment, are described.

Abstract: Disclosed are various ceramic frits which have a unique combination of low solubility, low-melting temperature, and freedom from lead oxide. They are formed from selected compositions in the alkali--ZnO--Al.sub.2 O.sub.3 --B.sub.2 O.sub.3 --P.sub.2 O.sub.5 --SiO.sub.2 --TiO.sub.2 --F system.