Mitsui Minings & Melting Co., Ltd.

Yuunosuke Nakahara

Takashi Wakabayashi

Ryuji Ninomiya

Junichi Matsunaga

An exhaust gas purifying catalyst includes: a composite oxide represented by: (AMM') (SiN)O. A is a cation of at least one of La and Pr; M is a cation of at least one of Ba, Ca, and Sr; M&#x2032; is a cation of at least one of Nd, Y, Al, Pr, Ce, Sr, Li, and Ca; N is a cation of at least one of Fe, Cu, and Al. The following are satisfied: 6&#x2266;a&#x2266;10, 0&#x3c;w&#x3c;5, 0&#x2266;x&#x3c;5, 0&#x3c;w+x&#x2266;5, 0&#x2266;y&#x2266;3, 0&#x2266;z&#x2266;3, A&#x2260;M&#x2032;, and x&#x2260;0 when A is a cation of La. A noble metal ingredient which forms a solid solution with the composite oxide or is supported on the composite oxide, and an exhaust gas purifying catalyst product formed of a carrier made of a ceramic or metallic material, and a layer of the exhaust gas purifying catalyst supported on the carrier.

Exhaust gas purifying catalyst

The present invention provides a lead-free tin-silver-based soldering alloy which has a low melting point equal to alloy H without containing harmful lead, expensive In or the like, and has excellent mechanical characteristics, that is, a tensile strength, an elongation value and heat fatigue characteristic as compared with alloy H, and thus, is applicable to soldering work at a low temperature and can make products which have a high reliability and long useful life or durability. The lead-free tin-silver-based soldering alloy consists essentially of Ag: 2 to 4% by weight, Zn: 0.5 to 2% by weight, Bi: 2 to 6% by weight, and the balance being substantially Sn.

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Saitama, Japan

Yuunosuke Nakahara