Kabushiki Kaisha Toyota Chuo Kenkyusho

Nobuyuki Yamamoto

Osami Kamigaito

Haruo Doi

Takatoshi Suzuki

Noboru Komatsu

Yukikazu Tsuzuki

Tatsumi Hioki

Shoji Noda

Toshio Kandori

Yoshiharu Hirose

Kazuya Sano

Fast union of a ceramic article to an opposed material is attained by a method which comprises forming a film of metal on the surface of the ceramic article, irradiating the surface of the metallic film with high-energy ions to bind the metallic film fast to the ceramic article, and supplying solder or brazing alloy to the surface of the metallic film and soldering or brazing the ceramic article to the opposed article. The high-energy ions for the irradiation has a magnitude of 30 to 800 keV and the dosage of the high-energy ions is in the range of 5.times.10.sup.15 to 2.times.10.sup.18 ions/cm.sup.2.

Method of bonding ceramic article

Semiconductive barium titanate having a positive temperature coefficient of resistance comprises a barium titanate semiconductor including barium titanate and a small quantity of a doping element, and at least one additive selected from among silicon nitride, titanium nitride, zirconium nitride and silicon carbide. The semiconductive barium titanate of this invention has a sharp rise in the variation of specific resistivity with temperature change and a large specific resistivity ratio in the PTC temperature region, and can be produced with high reproducibility, since a widely differing quantity of the doping element can be effectively added to barium titanate.

Semiconductive barium titanate

A converter for the purification of exhaust gases from internal combustion engines and the like which comprises a first converting layer of a catalyst of a sintered body structure selected from the group consisting of nickel oxide-copper oxide; manganese oxide-cerium oxide; manganese oxide-lanthanum oxide; manganese oxide-iron oxide; manganese oxide-niobium oxide; manganese oxide-nickel oxide; and either niobium oxide or yttrium oxide or mixtures of both with cobalt oxide; and a second converting layer of a catalyst selected from the group consisting of platinum; platinum-rhodium; platinum-palladium; and nickel oxide, chromium oxide, copper oxide, iron oxide and barium oxide; wherein the converter is constructed so that the exhaust gases pass through said first converting layer and then through said second converting layer. A copper-filled layer consisting of a copper-containing material may be further provided upstream of said first and second converting layers.

Converter for the purification of exhaust gases

An alloy of nickel-aluminum-molybdenum containing silicon in the ranges enclosed between points A (nickel--85% by weight, aluminum--5% by weight, molybdenum--10% by weight), B (nickel--75%, aluminum--15%, molybdenum--10%), C (nickel--65%, aluminum--15%, molybdenum--20%) and D (nickel--75%, aluminum--5%, molybdenum--20%) as shown in FIG. 1 and including silicon in the range of 0.1 to 3% by weight and preferably in a range of 0.5 to 2.5% by weight.

Silicon-containing nickel-aluminum-molybdenum heat resisting alloy

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Nagoya, Japan

Nobuyuki Yamamoto