Mitsui Minings & Melting Co., Ltd.

Yuichi Anno

Isamu Yashima

Rintaro Ishii

Shingo Ide

Hitoshi Kajino

Kiyoshi Shinoda

Yasuhisa Izutsu

Masatoshi Yamazaki

Akira Abe

Minoru Kahata

Shinji Karino

Jun Omura

Ryouma Tsukuda

In order to provide a novel oriented apatite-type oxide ion conductor which can achieve an increase in area through suppression of crack generation and preferably can be manufactured more inexpensively by an uncomplicated process, an oriented apatite-type oxide ion conductor composed of a composite oxide represented by A[TM]OA in the formula is one kind or two or more kinds of elements selected from the group consisting of La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Be, Mg, Ca, Sr, and Ba. T in the formula is an element including Si, Ge, or both of them. M in the formula is one kind or two or more kinds of elements selected from the group consisting of B, Ge, Zn, Sn, W, and Mo.

Oriented apatite-type doped rare earth silicate and/or germanate ion conductor and method for manufacturing same

A co-catalyst for purifying an exhaust gas which can be used for a loner period of time as an actual catalyst by using the cerium oxide in the conventional co-catalyst for purifying the exhaust gas as a cerium-containing complex oxide for elevating the resistance to heat and suppressing the performance reduction due to thermal deterioration and by making a specific surface area and an oxygen storage capacity over specified values. A co-catalyst for purifying an exhaust gas of the present invention includes a composite oxide including (a) cerium; and (b) at least one element selected from the group consisting of zirconium, yttrium, strontium, barium and a rare-earth element supported on a particulate aluminum oxide support; a specific surface area of the co-catalyst after sintering being not less than 40 m2/g; an oxygen storage capacity at 400&deg; C. being not less than 10 &mgr;mols/g and an oxygen storage capacity at 700&deg; C. being not less than 100 &mgr;mols/g.

Co-catalyst for purifying exhaust gas

A process for producing a thermoelectric material comprising mixing at least two of bismuth, tellurium, selenium, and antimony and, if desired, a dopant, melting the mixture, grinding the resulting alloy ingot, forming the powder, and sintering the green body under normal pressure, or hot pressing the powder, wherein the grinding and the normal sintering or hot pressing are carried out in the presence of a solvent represented by C H OH or C H CO (wherein n is 1, 2 or 3).

Process for producing thermoelectric material

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Ageo, Japan

Yuichi Anno