Mitsui Minings & Melting Co., Ltd.

Ryoma Tsukuda

Naohiko Abe

Susumu Takahashi

Hiromu Watanabe

Kenichi Amitani

Yoshinori Matsuura

Yoshihiro Yoneda

Hiroki Takahashi

Isamu Yashima

Norihiko Miyashita

Koichi Miyake

Akiko Sugimoto

Kazuhiko Kato

Takashi Kubota

Koji Taniguchi

Satoshi Mogi

Hironari Urabe

Tomoyasu Yano

Hiromu Watanbe

An electrode catalyst layer for fuel cells capable of effectively preventing reduction of cell voltage in a high current density region. The electrode catalyst layer contains a catalyst-on-support composed of a support made of a conductive inorganic oxide having a catalyst supported thereon and a hydrophilic material. The hydrophilic material is an agglomerate including hydrophilic conductive particles. The content of the hydrophilic material in the catalyst layer is 2 mass % or higher and lower than 20 mass % relative to the sum of the support and the hydrophilic material. The ratio of the particle size d1 of the hydrophilic particles to the particle size D of the catalyst-on-support is 0.5 to 3.0. The ratio of the particle size d2 of the hydrophilic material to the thickness T of the catalyst layer is 0.1 to 1.2.

Electrode catalyst layer for fuel cells and solid polymer fuel cell using same

In this fuel cell electrode catalyst layer, a catalyst is supported on a carrier comprising inorganic oxide particles. The fuel cell electrode catalyst layer is provided with a porous structure. When a mercury penetration method is used to measure the pore size distribution of the porous structure, a peak is observed in the range spanning from 0.005 &#x3bc;m to 0.1 &#x3bc;m inclusive, and a peak is also observed in the range spanning from over 0.1 &#x3bc;m to not more than 1 &#x3bc;m. When P1 represents the peak intensity in the range spanning from 0.005 &#x3bc;m to 0.1 &#x3bc;m inclusive, and P2 represents the peak intensity in the range spanning from over 0.1 &#x3bc;m to not more than 1 &#x3bc;m, the value of P2/P1 is 0.2-10 inclusive. It is preferable that the inorganic oxide be tin oxide.

Fuel cell electrode catalyst layer, production method therefor, membrane electrode assembly, and solid polymer fuel cell

Disclosed is a tin oxide containing antimony and at least one element A selected from the group consisting of tantalum, tungsten, niobium, and bismuth. The antimony and the at least one element A selected from the group consisting of tantalum, tungsten, niobium, and bismuth are preferably dissolved in a solid state in tin oxide. The ratio of the number of moles of the element A to the number of moles of antimony, i.e., [(the number of moles of the element A/the number of moles of antimony)], is preferably 0.1 to 10.

Tin oxide, electrode catalyst for fuel cells, membrane electrode assembly, and solid polymer fuel cell

With respect to a reflection-type display device, an Al-based alloy material for a reflective film, which has excellent reflective characteristics and can be directly bonded to a transparent electrode layer such as ITO and IZO is provided. The present invention is Al&#x2014;Ni&#x2014;B alloy material for a reflective film, comprising aluminum containing nickel and boron, wherein a nickel content is 1.5-4 at %, a boron content is 0.1-0.5 at %, and the balance is aluminum. It is more preferable if the nickel content is 1.5-3 at %, and the boron content is 0.1-0.4 at %.

Al-Ni-B alloy material for reflective film

A p-type thermoelectric material is prepared by mixing and melting at least two members selected from bismuth, tellurium, selenium, antimony, and sulfur to obtain an alloy ingot; grinding the alloy ingot to obtain powder of the allow mass; and hot pressing the powder. At least the hot pressing is carried out in the presence of any one of hexane and solvents represented by CHOH or CHCO (where n is 1, 2 or 3). A dopant may be used at the step of mixing.

Process for preparing p-type thermoelectric material

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Ageo, Japan

Ryoma Tsukuda