Abstract: A powder having a negative coefficient of linear thermal expansion and sealing compositions containing the same are disclosed wherein the powder is a .beta.-eucryptite particle having on the surface thereof a layer of tin oxide, titanium oxide, and/or zirconium oxide.

Abstract: A powder having a negative coefficient of linear thermal expansion and sealing compositions containing the same are disclosed wherein the powder is a .beta.-eucryptite particle having on the surface thereof a layer of tin oxide, titanium oxide, and/or zirconium oxide.

Abstract: Gold-plated electronic components are disclosed, as well as a process for producing the same, wherein an alloy of nickel and cobalt or an alloy containing these elements as essential ingredients is used as an undercoat for the gold-plated layer.

Abstract: A gas detecting element including a semiconductor wafer formed of a transition-metal oxide with an electrode layer bonded to both sides of the wafer and a protective layer overlaid on the surface of the electrode layer. A metal lead wire is attached to each electrode layer by means of an electrically conductive adhesive wherein the region at which the metal lead wire is bonded to the electrode layer is reinforced by an insulating adhesive that covers the region. A process for producing such a gas detecting element is also disclosed.

Abstract: A plug-in type oxygen detector for detecting oxygen contained in exhaust gas is disclosed which comprises a series connected, sintered N and P type oxide semiconductors which have temperature dependencies in the same direction and respond to a partial pressure of oxygen in exhaust gas, an output being derived from a common junction of the semiconductors.

Abstract: A powder having a negative coefficient of linear thermal expansion and sealing compositions containing the same are disclosed wherein the powder is a .beta.-eucryptite particle having on the surface thereof a layer of tin oxide, titanium oxide, and/or zirconium oxide.

Abstract: An enameled steel plate is disclosed having a linear thermal coefficient of expansion at a temperature between 30.degree. C. and 500.degree. C. within the range of from 100.times.10.sup.-7 to 190.times.10.sup.-7 /.degree. C. and covered with phosphate glass or crystallized glass consisting essentially of from 40 to 75 mol % component X, from 20 to 55 mol % component Y, and from 0.1 to 10 mol % component Z, whereinComponent X is P.sub.2 O.sub.5 ;Component Y is selected from ZnO, K.sub.2 O, B.sub.2 O.sub.3 and Al.sub.2 O.sub.3 in an amount of up to 20 mol % and CaO and BaO in an amount of up to 55 mol %; andComponent Z is selected from SrO, Ta.sub.2 O.sub.5, La.sub.2 O.sub.3, CeO.sub.2, and Nb.sub.2 O.sub.5.The product has improved water resistance and chemical durability especially in high temperature and high humidity environment, and therefore, is suitable for use in thick film hybrid integrated circuits employed in automobiles.

Abstract: A strong and biocompatible sintered phosphate of calcium ceramics are obtained by sintering a powdery material substantially consisting of phosphate of calcium having a Ca/P ratio of 1.4-1.75, e.g. apatite group and/or tricalcium phosphate, and not exceeding 15% by weight of CaO-P.sub.2 O.sub.5 frit having a Ca/P ratio of 0.2-0.75. Y.sub.2 O.sub.3 incorporation therein improves the bending strength of the ceramics. Furthermore, a P.sub.2 O.sub.5 -metal oxide frit wherein metal oxide being one or more selected from BaO, CaO, MgO, ZnO, NaO and K.sub.2 O provides a more improved bending strength. The Y.sub.2 O.sub.3 incorporation herein still improves the strength of the sintered product.

Abstract: A gas detector including a gas sensitive element that provides an electrical resistance which varies with the type of gas detected and lead wires for conducting the electrical signal from the gas sensitive element. A porcelain tube supports the gas sensitive element the lower part of which is positioned within a slot in the tube. Through holes in the tube receive the lead wires. A housing encloses the tube. Only the upper part of said gas sensitive element which is not positioned within the tube is provided with electrodes.

Abstract: A seal structure consisting of a ceramic base and a low-expansion metallic material bonded by a low-melting glass particularly useful for large scale integrated circuit (LSI) applications is disclosed. When using a high alumina ceramics containing 65 to 92% of Al.sub.2 O.sub.3 by weight as a ceramic, the thermal coefficients of expansion are best matched while maintaining a comparatively low dielectric constant by using a composition consisting of 60 to 85% lead borate glass, 10 to 30% .beta.-eucryptite and 0.5 to 15% zircon as a low-melting sealing glass.