Abstract: A method for making a glass frit paste is provided. First, nitrocellulose is dissolved in a high vapor pressure solvent of the nitrocellulose to make a solution. A portion of the solution is then mixed with alpha-terpineol to form a vehicle. Glass frit is mixed with the vehicle and then ground to form the paste. During the grinding step most of the high vapor pressure solvent evaporates. The resulting paste has a composition comprising about 0.3-12.0 wt. % nitrocellulose, about 0.5-2.0 wt. % of a high vapor pressure solvent of said nitrocellulose, about 14.0-25.0 wt. % alpha-terpineol, and the remainder glass frit.

Abstract: A sealing glass composition in powdered form comprising a crystallizable PbO/ZnO/B2O3/SiO2 glass in the vitreous state, an effective amount of a nucleating agent, and an optional filler. The glass composition can be used to seal television picture tubes with excellent results when heated to a hold range of about 420° C. to about 435° C.

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 fluorescent lamp includes a glass bulb whose inner surface is coated with a fluorescent substance, a glass bead attached to an end of the glass bulb so as to seal the glass bulb, an exhaust tube provided in the glass bead and sealed, a filament coil arranged in an internal portion of the glass bulb, and an electrode terminal member electrically connected to the filament coil. The glass bead controls a position of the electrode terminal member. The glass bulb preferably contains 5 to 10 wt % of Na2O. The glass bulb, the glass bead and the exhaust tube preferably have a lead-free composition.

Abstract: The zirconium-containing and lithium-containing borosilicate glasses have a higher resistance to chemical attack and have the following composition (in % by weight on an oxide basis): SiO2, 71 to <73%; B2O3, 7 to 10%; Al2O3, 6 to 9%; Li2O, 0.5 to 2%; Na2O, 0 to 10%; K2O, 0 to 10%; MgO, 0 to 2%; CaO, 0 to 3%; SrO, 0 to 3%; BaO, 0 to 3%; ZnO, 0 to 3%; ZrO2, 0.8 to 3%; CeO2, 0 to 1%, and a refining agent in an amount suitable for refining, as needed, with the proviso that a total amount of Li2O+Na2O+K2O is from 0.5 to 10.5%, and with the proviso that a total amount of MgO+CaO+SrO+BaO+ZnO is from 0 to 3%. These borosilicate glasses with their thermal expansion coefficients &agr;20/300 between 5.2 and 5.7×10−6/K are especially suitable for sealing glasses for Fe—Co—Ni alloys.

Abstract: A sealing glass paste which comprises at least one sealing glass frit powder and an aqueous binder which comprises an aqueous solution, dispersion or emulsion of a polymeric material and a water soluble oxidant which decomposes at a temperature of below 475° C., the polymeric material burning out or decomposing at a temperature of below 475° C., in the presence of the oxidant, to leave less than 2% of residues based on the total weight of the solids content of the binder. The sealing glass pastes may be used in the assembly of cathode ray tubes. The aqueous binder system which is used results in low carbonaceous residue levels after firing and does not contain volatile organic solvents. Furthermore, using this aqueous binder system sealing glass pastes can be prepared with sealing glasses which include PbO therein.

Abstract: Provided are a glass such as a sealing glass which contains a rare earth element and crystalline particles, a structure made by sealing with said sealing glass, a magnetic head made by bonding using said sealing glass, and a magnetic recording and reproducing apparatus on which said magnetic heads are mounted. According to the glass of the present invention, magnetic heads, and other structures can be bonded at low temperatures and a high bond strength can be attained, and thus, magnetic heads having high-speed sliding properties and magnetic recording and reproducing apparatuses of high reliability can be obtained. The glass can be also used for heat resistant parts such as a pannel glass for a cathode-ray tube and the like.

Abstract: The present invention provides high temperature sealing glass compositions for use in producing mechanically and chemically durable electrically insulating hermetic glass seals between materials such as zirconia, alumina, fosterite, steatite, carbon steels, stainless steels, and superalloys. High temperature sealing glass compositions according to the present invention include a glass component and optional vehicles. The glass component includes one or more glass frits containing in weight percent from about 17% to about 56% BaO+SrO, from about 18% to about 60% SiO.sub.2, from about 6% to about 36% B.sub.2 O.sub.3, from about 2% to about 32% Al.sub.2 O.sub.3, from about 0% to about 25% CaO plus MgO, from about 0% to about 20% Y.sub.2 O.sub.3, from about 0% to about 7% ZrO.sub.2, from about 0% to about 3% alkali oxides, from about 0% to about 5% Co.sub.3 O.sub.4, from about 0% to about 5% NiO, and from about 0% to about 3% MoO.sub.3.

Abstract: The present invention relates to a sealing glass composition, which is able to seal a panel and funnel of a color TV at low temperature for a short time by adding Garnet(Fe.sub.3 Al.sub.2 Si.sub.3 O.sub.12) as a nucleating agent and filler component to control the thermal expansion coefficient.

Abstract: A method of controlling the rheology of a sealing glass paste which comprises incorporating a fine inorganic powder in the paste as a mill addition to impart a steep rheology curve to the paste so that the paste resists flow while at rest, but flows readily when shear stress is applied, the amount of inorganic powder incorporated being not over about 10% by weight.

Abstract: A fusion sealing material, and a fusion seal prepared therefrom, consisting essentially of at least 65% of a SnO--ZnO--P.sub.2 O.sub.5 glass fit, up to 10% of a crystallization catalyst and 0-25% of an additive that decreases the effective CTE of a seal prepared with the material.

Abstract: An insulating paste comprises a glass component composed of SiO.sub.2, B.sub.2 O.sub.3 and K.sub.2 O as xSiO.sub.2 -yB.sub.2 O.sub.3 -zK.sub.2 O, where x, y and z (% by weight) fall within the area surrounded by points A (x=65, y=35, z=0), B (x=65, y=20, z=15), C (x=85, y=0, z=15) and D (x=85, y=15, z=0), and an organic vehicle. The insulating layer made of the paste has a low dielectric constant and excellent insulating properties.

Abstract: A sealing composition (134) includes about 85-95 wt. % glass frit, about 2-8 wt. % butyl carbitol acetate, about 2-8 wt. % alpha-terpineol, about 0.05-0.8 wt. % ester alcohol, and about 0.05-0.8 wt. % low molecular weight ethyl cellulose binder. A method for fabricating an apparatus (100) includes the steps of applying the sealing composition (134) to a portion (132) of the apparatus (100), removing the butyl carbitol acetate, the alpha-terpineol, and the ester alcohol, removing the binder, and heating the glass frit to a sealing temperature of the glass frit.

Abstract: A hermetic sealing composition comprising 100 parts by weight of a basic composition consisting of from 80 to 99.9 wt % of a crystalline low melting glass powder containing lead and boron and from 0.1 to 20 wt % of a low expansion ceramic filler, and from 0.001 to 1.0 part by weight, in total, of at least one of an .alpha.-4PbO.B.sub.2 O.sub.3 crystal powder and a Pb.sub.3 O.sub.4 powder, incorporated to the basic composition, the thermal expansion coefficient of the sealing composition after firing being from 80.times.10.sup.-7 to 105.times.10.sup.-7 /.degree.C. within a range of from room temperature to 300.degree. C.

Abstract: A hermetic sealing composition consisting essentially of from 60 to 99 wt % of a bismuth type low melting glass powder and from 1 to 40 wt % of a low expansion ceramic filler powder, wherein the low melting glass has a composition consisting essentially of:______________________________________ Bi.sub.2 O.sub.3 77 to 95 wt %, MgO + ZnO 1 to 20 wt %, B.sub.2 O.sub.3 2 to 10 wt %, SiO.sub.2 0 to 1 wt % and CeO.sub.2 0 to 10 wt %.

Abstract: For a combination of a membrane of SrFeCo.sub.0.5 O.sub.x and an Inconel alloy, a high-temperature seal is formed between the membrane and the alloy. The seal is interposed between the alloy and the membrane, and is a fritted compound of Sr oxide and boric oxide and a fritted compound of Sr, Fe and Co oxides. The fritted compound of SrFeCo.sub.0.50 O.sub.x is present in the range of from about 30 to 70 percent by weight of the total sealant material and the fritted compound of Sr oxide and boric oxide has a mole ratio of 2 moles of the Sr oxide for each mole of boric oxide. A method of sealing a ceramic to an Inconel metal alloy is also disclosed.

Abstract: Disclosed herein is a glass composition for insulation which comprises SiO.sub.2 and at least one of B.sub.2 O.sub.3 or K.sub.2 O in a ratio falling within the region enclosed by lines passing through point A (65, 35, 0), point B (65, 20, 15), point C (85, 0, 15) and point D (85, 15, 0) on a composition diagram for the ternary system of SiO.sub.2, B.sub.2 O.sub.3 and K.sub.2 O. The glass composition can additionally contain at least one member selected from the group consisting of Al.sub.2 O.sub.3, La.sub.2 O.sub.3, CaO, Ta.sub.2 O.sub.5 and Nd.sub.2 O.sub.3 in an amount less than 25 parts by weight for 100 parts by weight of the major constituents.

Abstract: The glass panel and funnel of a color TV picture tube are sealed to one another at 420.degree. C. within 20 minutes, using a composition which includes:(a) 93-99.8 weight percent PbO--B.sub.2 O.sub.3 --ZnO devitrifiable glass powder made of:74-82 weight percent PbO,7-10 weight percent B.sub.2 O.sub.3,8-12 weight percent ZnO,1-4 weight percent SiO.sub.2,0.05-0.5 weight percent MgO,0.1-0.5 weight percent BaO, and0.1-0.5 weight percent F;(b) 0.1-4.0 weight percent synthetic zircon having a specific surface area of 1.0-2.0 m.sup.2 /g, as a nucleating agent; and(c) 0.1-3.0 weight percent corderite, as a filler.

Abstract: A hermetic sealing composition comprising 100 parts by weight of a basic composition consisting of from 80 to 99.9 wt % of a crystalline low melting glass powder containing lead and boron and from 0.1 to 20 wt % of a low expansion ceramic filler, and from 0.001 to 1.0 part by weight, in total, of at least one of an .alpha.-4PbO.B.sub.2 O.sub.3 crystal powder and a Pb.sub.3 O.sub.4 powder, incorporated to the basic composition, the thermal expansion coefficient of the sealing composition after firing being from 80.times.10.sup.-7 to 105.times.10.sup.-7 /.degree.C. within a range of from room temperature to 300.degree. C.

Abstract: A low temperature sealing composition comprising PbO--B.sub.2 O.sub.3 --Bi.sub.2 O.sub.3 glass powder with a reduced amount of SiO.sub.2 content but with an addition of GeO.sub.2 so as to realize a lowered sealing temperature such as 400.degree.-310.degree. C. The glass powder consists essentially of 25-85 wt. % of PbO, 1-11.2 wt. % of B.sub.2 O.sub.3, 5.1-70 wt. % of Bi.sub.2 O.sub.3, 0.1-20 wt. % of GeO.sub.2, 0-5 wt. % of SiO.sub.2, 0-10 wt. % of Fe.sub.2 O.sub.3, 0-10 wt. % of CuO, 0-15 wt. % of ZnO, 0-5 wt. % of TiO.sub.2, and 0-9 wt. % of F.sub.2. The glass powder may be used by mixing with 15-55 vol. % of refractory filler powder of at least one element which is selected from the group consisting of lead titanate based ceramic powder, willemite based ceramic powder, cordierite ceramic powder, zircon based ceramic powder, tin oxide solid solution powder, and alumina powder.

Abstract: According to this invention, there is disclosed a thermal conductivity substrate which includes an aluminum nitride sintered body and a coating layer formed on the body of aluminum phosphate and having a surface roughness of 1 .mu.m or less, and which has excellent humidity resistance and chemical resistance.

Abstract: The present invention relates to a novel sealing glass composition, in particular, one which comprises solid PbO--ZnO--B.sub.2 O.sub.3 glass and natural garnet as a filler component. This composition has the advantage that thermal strain does not occur at the interface between the crystalline glass and filler because of the excellent chemical affinity. This prevents cracks from propagating at the interface between the main glass and filler, thereby improving the mechanical strength of the glass.

Abstract: As a sealing composition which can seal a panel and a funnel of a color CRT at a relatively low temperature for a relatively short time, a non-crystallizing sealing glass essentially consists of PbO--ZnO--B.sub.2 O.sub.3 --Bi.sub.2 O.sub.3 --CS.sub.2 O system and has a thermal expansion coefficient of 80 to 95.times.10.sup.-7 /.degree.C. The sealing glass can be used as a mixture with 40 to 5 volume percent of refractory filler powder. The PbO--ZnO--B.sub.2 O.sub.3 --Cs.sub.2 O system glass consists essentially of, by weight, 65-80% of PbO, 5.5-8% of B.sub.2 O.sub.3, 3-9% of ZnO, 7-22% of Bi.sub.2 O.sub.3, 16% or more of ZnO +Bi.sub.2 O.sub.3, 0.2-1% of SiO.sub.2, 0.3-2% of Fe.sub.2 O.sub.3, and 1.5-4.5% of Cs.sub.2 O. The refractory filler is at least one element selected from tin oxide, lead titanate, and zinc silicate.

Abstract: A magnetic head for use in a magnetic recording and reproducing system, which head is excellent in magnetic properties, resistance to abrasion, durability and mass-producibility, comprises a pair of magnetic cores each having a substrate and a magnetic alloy film formed on the substrate, the cores being disposed in a manner such that the magnetic alloy films are opposed to and slightly spaced apart from each other, and glass bondings disposed between the magnetic alloy films to integrate the pair of magnetic cores, and a process for producing the same, and a magnetic recording and reproducing system using the magnetic head.

Abstract: A fusion seal between two surfaces, and a material to produce the seal, consist essentially of 60-90 percent by weight of a SnO--ZnO--P.sub.2 O.sub.5 glass frit and 10-40 percent by weight of a mill addition including alumina and, optionally, zircon, the alumina content being at least 10% when it constitutes the mill addition and not over 20% in conjunction with zircon, 0-15 % of a further additive that reduces the effective CTE of the seal, the mill addition being present in a sufficient amount to cause a substantial change in viscosity-temperature characteristics of the material after formation of a seal. The effect of the mill addition on viscosity in a fusion seal finds particular application in uniting the faceplate and funnel members to form a cathode ray tube envelope.

Abstract: A fusion seal between two surfaces, and a material to produce the seal, consisting essentially of 60-85 percent by weight of a SnO--ZnO--P.sub.2 O.sub.5 glass frit and 15-40 percent by weight of a mill addition including an additive selected from the group consisting of 15-40% zircon and 15-40% of an alumina-zircon mixture in which the alumina content is less than 10%, the additive amounts being based on the sealing material total, the mill addition being present in sufficient amount to provide a set point of at least 300.degree. C. The effect of the mill addition in a fusion seal finds particular application in uniting the faceplate and funnel members to form a cathode ray tube envelope.

Abstract: The present invention relates to low temperature sealing glass compositions using ceramic composite filler useful for sealing alumina ceramic package, in particular, to compositions for hermetic-sealing cap and base of alumina package which consists of a solid PbO-B.sub.2 O.sub.3 glass powder and a filler selected from zinc zirconium silicate composite or magnesium aluminum zirconium silicate composite as a low thermal expansion ceramic composite. The used composite filler composes of zircon and willemite crystal phase or zircon and cordierite crystal phase uniformly mixed on the filler and has the low thermal expansion coefficient of 20.degree..about.40.degree..times.10.sup.-7 /.degree.C.

Abstract: A sealing glass material comprising a thermally crystallizable, PbO--ZnO--B.sub.2 O.sub.3 sealing glass flit and a mill addition selected from alumina, zircon, and manganese dioxide, the mill addition being in an amount sufficient to increase the mechanical strength in a fusion seal to at least 55.2 MPa(8000 psi), but the amount being not over about 5% by weight of the sealing material.

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: A sealing glass composition suitable for bonding ceramic surfaces at low temperatures and which includes in weight percent 5-50% thallium oxide, 10-40% vanadium oxide, 5-30% tellurium oxide, 1.5-15% arsenic oxide and 1-5% phosphorous oxide. Other additives may be included, such as bismuth oxide. A paste formulated from said glass and a filler for the purpose of adjusting the fluidity and/or dielectric constant of the paste.

Abstract: A polarizer, a Faraday rotator and an analyzer are fixed by fused glass applied on an outer periphery of the polarizer to be contacted with the Faraday rotator and on an outer periphery of the analyzer to be contacted with the Faraday rotator. No adhesive exists between contact planes of the polarizer and the Faraday rotator and those of the Faraday rotator and the analyzer.

Abstract: A glass composition and method of preparation utilizes a mixture consisting of phosphorus oxide within the range of about 40 to 49 molar percent, lead oxide within the range of about 10 to 25 molar percent, iron oxide within the range of about 10 to 17 molar percent and an alkali oxide within the range of about 23 to 30 molar percent. The glass resulting from the melting and subsequent solidifying of the mixture possesses a high degree of durability and a coefficient of thermal expansion as high as that of any of a number of metals. Such features render this glass highly desirable in glass-to-metal seal applications.

Abstract: There is provided a sealing glass composite which has a desired coefficient of thermal expansion. The composite is made up of a glass matrix having a first coefficient of thermal expansion and a substantially spherical particulate additive with a second coefficient of thermal expansion dispersed within the matrix. Use of a substantially spherical particulate additive having a reduced surface area as compared to other shaped particulate additive minimizes the reaction between the additive and the glass matrix. The spherical particles also provide better flow at high loading factors and improved fracture toughness.

Abstract: A low temperature sealing glass composition suitable for sealing integrated circuit alumina packages at temperatures below 400.degree. C. in a short time of about ten minutes. This sealing glass composition is a mixture of a glass powder and 1 to 50% (by weight) of one or more low expansion ceramic powders. The glass powder comprises a lead borate or lead zinc borate glass and the joint addition of Cu.sub.2 O, Tl.sub.2 O and F in a range of 6.3 to 20% (by weight) wherein the molar ratio of Cu to Tl to F is in the range between 0.8 Cu: 0.8 Tl: 0.8 F to 1.2 Cu: 1.2 Tl: 1.2 F. The glass in powder form is blended with one or more compatible low expansion ceramic powders including cordierite, zircon, willemite, lead titanate or modified tin oxide.

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: In a borosilicate glass plate containing Li.sub.2 O, Na.sub.2 O and K.sub.2 O and for use as a window plate in an alumina package for containing a semiconductor device, Li.sup.+ and Na.sup.+ ions are partially ion-exchanged by K.sup.+ ions in a surface of the glass plate to form a surface layer having a compressive stress of 200 Kg.f/cm.sup.2 or more, in order to make a thin window glass plate for the package having a thickness of 0.7 mm or less and a sufficient mechanical strength. The glass also has a thermal expansion coefficient of 50-75.times.10.sup.-7 /.degree. C. over a temperature range of 30.degree.-380.degree. C. so as to be thermally compatible with the alumina package. The glass consists essentially of SiO.sub.2 55-64%, Al.sub.2 O.sub.3 7-20%, B.sub.2 O.sub.3 11-19%, Li.sub.2 O 0-8%, Na.sub.2 O 7-20%, K.sub.2 O 0-4%, and RO 0.5-7% on the base of weight percent, where R is at least one of Mg, Ca, Sr, and Ba. In order to insure the ion exchange, amounts of Li.sub.2 O, Na.sub.2 O and K.sub.

Abstract: A composition for metalizing low temperature-fired ceramics according to the invention includes: a combination of two or three oxides selected from the group consisting of 1 to 8 percent by weight of bismuth(III) oxide (Bi.sub.2 O.sub.3), 0.1 to 5 percent by weight of MoO.sub.3, and 0.1 to 2 percent by weight of Cr.sub.2 O.sub.3 as well as a primary constituent, that is, mixture of copper (Cu) and copper(II) oxide (CuO) or mixture of copper(II) oxide (CuO) and copper(I) oxide (Cu.sub.2 O). The additives of the invention efficiently keep the resultant metalized layer out of cracks and prevent local sintering and burr of the metalized layer.

Abstract: Lead-free, SnO-ZnO-P.sub.2 O.sub.5 glasses contain 25-50 mole percent P.sub.2 O.sub.5 and SnO and ZnO in amounts such that the mole ratio of SnO:ZnO is in the range of 1:1 to 5:1. Optionally, the glasses may contain up to 20 mole percent of modifying oxides including up to 5 mole percent SiO.sub.2, up to 20 mole percent B.sub.2 O.sub.3 and up to 5 mole percent Al.sub.2 O.sub.3, as well as one or more crystallization promoters selected from 1-5 mole percent zircon and/or zirconia and 1-15 mole percent R.sub.2 O. The glasses are particularly useful as sealing glass frits in sealing material to join component parts in articles such as cathode ray tubes. The sealing glass material may contain mill additions to reduce the effective coefficient of thermal expansion in a seal.

Abstract: A process for producing a curved glass plate, which comprises coating a crystallizable ceramic color composition to a predetermined portion of a glass plate, followed by baking at a temperature of from 500.degree. to 620.degree. C. to fuse the ceramic color composition to the glass plate, then crystallizing the fused ceramic color composition at a temperature of from 600.degree. to 700.degree. C., followed by bend-shaping by a pressing apparatus in a furnace.

Abstract: Low temperature sealing glass compositions comprising 35 to 80% by weight TeO.sub.2, 15 to 50% V.sub.2 O.sub.5 and 0.1 to 20% Nb.sub.2 O.sub.5, ZrO.sub.2 and/or ZnO.

Abstract: A hermetic sealing glass composition comprising an inorganic component which consists essentially of from 60 to 100 wt % of a glass powder, from 0 to 30 wt % of a filler and from 0 to 10 wt % of a pigment, wherein said glass powder consists essentially of from 30 to 45 wt % of SiO.sub.2, from 11 to 25 wt % of Al.sub.2 O.sub.3, from 11 to 25 wt % of ZnO, from 11 to 25 wt % of B.sub.2 O.sub.3, from 0.05 to 10 wt % of ZrO.sub.2, from 0.1 to 10 wt % of at least one of La.sub.2 O.sub.3, from 0.1 to 7 wt % of BaO, SrO, or CaO+MgO, from 0.1 to 7 wt % of at least one Li.sub.2 O, +Na.sub.2 or K.sub.2 O, from 0.1 to 5 wt % of at least one CeO.sub.2, +TiO.sub.2 or SnO.sub.2, from 0 to 5 wt % of PbO and from 0 to 5 wt % of at least one metal oxide selected from the group consisting of oxides of Co, Ni, Cr, Mn, Fe and Cu.

Abstract: A fusion sealing material containing a mill addition, a sealing tape cast from the material, and a method of producing the tape. The material is composed of a low temperature glass, a mill addition that lowers the effective coefficient of thermal expansion of the glass in a seal and an organic medium. The sealing tape is prepared by hot mixing the solids with a liquefied medium, such as a high melting alcohol, and casting the hot mix onto a cold sheet to immediately solidify the medium.

Abstract: In the low temperature-sintering porcelain components of the present invention, designating as A a group of main components containing 40.0-70.0% by weight of a Si component equivalent to SiO.sub.2, 25.0-55.0% by weight of a Ba component equivalent to BaCO.sub.3, 2.0-10.0% by weight of an Al component equivalent to Al.sub.2 O.sub.3, 1.0-3.0% by weight of a B component equivalent to B.sub.2 O.sub.3, 0.3-3.0% by weight of a Cr component equivalent to Cr.sub.2 O.sub.3, and 0.3-3.0% by weight of a Ca component equivalent to CaCO.sub.3, and designating Pb.sub.3 O.sub.4 as B, the low temperature-sintering porcelain components of the invention are ones which satisfy the following relations:80% by weight .ltoreq.A<100% by weigth and0% by weight <B.ltoreq.20% by weight.

Abstract: An optical isolator according to the present invention comprises a first polarizer, a Faraday rotator and a second polarizer which are adhered to one another in this order and held in a cylindrical magnet, wherein at least one adhered and supported portion comprises a low melting point glass 7 and 8. As the low melting point glass 7, 8, there may be used, for instance, those mainly comprising lead oxide and boron oxide; zinc oxide, lead oxide and boron oxide; lead oxide, boron oxide and thallium oxide; phosphoric acid and aluminum oxide; zinc oxide and boron oxide; and phosphorous pentaoxide, aluminum oxide and boron oxide. In the optical isolator according to the present invention, a low melting point glass is used for adhering the structural parts for the optical isolator, there is not observed any outgassing phenomenon due to the raise in ambient temperature as in the isolator which is assembled with an adhesive and the discrepancy of the optical axis due to the expansion of the adhesive.

Abstract: A glass sealant comprises a mixture of about 70-90% of a solder glass powder of a low-melting lead-borate glass with a transformation temperature of 330.degree. C. or lower, 1-20% by weight of cordierite powder, and 1-25% by weight of mullite powder, with the combined content of cordierite and mullite powder being from about 10-30%. The lead-borate glass comprises from about 82-88% by weight of PbO, 12-17% by weight of B.sub.2 O.sub.3, 0-1% by weight of SiO.sub.2, and 0-1% by weight of Al.sub.2 O.sub.3. Both the cordierite and mullite powder are preferably synthetically produced to reduce the .alpha.-radiation. The synthetically produced cordierite powder preferably still contains up to about 9% by weight of a non-crystalline vitreous phase. The grain size of the powders is preferably under 100 microns. This glass sealant has well-balanced properties relative to thermal expansion, melting temperature, dielectric constant, loss angle, mechanical strength, thermal shock resistance, and chemical resistance.

Abstract: A sealing glass is provided for the production of glass-to-metal seals, especially for battery headers, in storage batteries having a lithium electrode. The constituents of the glass, expressed in % by weight on an oxide basis, comprise:______________________________________ 16-25 SiO.sub.2 0-8 Li.sub.2 O 0-4 MgO 20-35 B.sub.2 O.sub.3 0-5 Na.sub.2 O 5-12 CaO 15-24 Al.sub.2 O.sub.3 0-10 K.sub.2 O 10-30 BaO + SrO 4-15 .SIGMA. alkali oxide 0-5 ZnO 15-40 .SIGMA. alkaline- earth oxide + ZnO ______________________________________The coefficient of thermal expansion of the glass is closely matched to the metals in the cell housing. This glass also has a good welding strength and corrosion resistance, as well as satisfactory hydrolytic resistance.

Abstract: A method and apparatus for joining flat-plate electrodes wherein a spacer, to which a joining material such as a low-melting-point crystallized glass containing a crystallization promoting agent is applied, is interposed between the electrodes to be joined. The electrodes and spacer are placed and held between upper and lower attraction dies. The upper and lower attraction dies are placed between upper and lower heating blocks for heating and pressing the electrodes and spacer through the attraction dies to join the electrodes via molten joining material.

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: This invention relates to a glass exhibiting a transistion temperature no higher than 425.degree. C. and excellent resistance to attack by water consisting essentially, expressed in terms of weight percent on the oxide basis, of about:______________________________________ P.sub.2 O.sub.5 38-50 MoO.sub.3 0-10 Al.sub.2 O.sub.3 0-5 WO.sub.3 0-10 Na.sub.2 O 2-10 MoO.sub.3 + WO.sub.3 2-15 Li.sub.2 O 0.75-5 SnO.sub.2 0-10 K.sub.2 O 2-10 Cl 0-8 (analyzed) Na.sub.2 O + Li.sub.2 O + 5-25 Sn.sub.2 O + MoO.sub.3 + 2-25 K.sub.2 O WO.sub.3 + Cl ZnO 28-40 ______________________________________and being essentially free of PbO.

Abstract: Compositions useful for printing controllable adhesion conductive patterns on a printed circuit board include finely divided copper powder, a screening agent and a binder. The binder is designed to provide controllable adhesion of the copper layer formed after sintering to the substrate so that the layer can lift off the substrate in response to thermal stress. Additionally, the binder serves to promote good cohesion between the copper particles to provide good mechanical strength to the copper layer so that it can tolerate lift off without fracture.