Showa Aluminum Corporation

Sumitomo Electric Industries, Limited

Nippon Steel Corporation

Asahi Kasei Kabushiki Kaisha

Showa Aluminium Kabushiki Kaisha

Hideo Shingu

Ryotatsu Otsuka

Kozo Arai

Keiichi Ishihara

Naoji Fujimori

Yuichi Sato

Toshio Yamada

Kazuo Toyoda

Isao Morimoto

Shigemi Tanimoto

Akira Doi

Mitsunobu Abe

Masashi Sakaguchi

Kenji Tsukamoto

Nobuyoshi Imaoka

Yasushi Tashiro

Ryotatsu Ootsuka

Osamu Watanabe

Shozo Yamanaka

Toshio Nishide

A thermoelectric material having a high Seeback coefficient and a large power factor and excellent in shock resistance, thermal strain resistance, and formability, and a thermoelectric element are disclosed. The thermoelectric material and thermoelectric element is composed of a multilayered body made up of a laminar body of a semimetal, a metal, or a synthetic resin and a laminar body of a semimetal. The average thickness of the laminar bodies ranges from 0.3 nm to 1000 nm. Embodiments of the combination of the laminar bodies are Bi&mdash;Al, Bi-polyamide series resin, and Ag&mdash;Fe. Such a multilayered body is manufactured by forming an initial multilayered body composed of all the types of laminar bodies constituting the multilayered body and rolling or uniaxially pressing a stack of such initial multilayered bodies.

Thermoelectric material and method for manufacturing the same

A method for forming non-equilibrium and/or metastable metallic or non-metallic powder, foil or fine wire material into a solid body comprises charging the material into a metal container, subjecting the metal container containing the material to rolling at a temperature at which the inherent properties of the material are maintained, and thereafter removing the metal container.

Method for the manufacture of formed products from powders, foils, or

Crude silicon is purified by melting the crude silicon, maintaining the molten silicon above the solidification temperature thereof in an inert gas atmosphere, and rotating a hollow rotary cooling member as immersed in the molten silicon while introducing a cooling fluid into the cooling member to cause high-purity silicon to crystallize on the outer surface of the cooling member.

Process and apparatus for purifying silicon

Diamond powder is produced without using an ultra-high pressure apparatus by a process comprising melting carbon and a metal capable of dissolving carbon to form a liquid, subjecting the liquid to quenching at an ultra-high cooling rate to form an amorphous metal, heating the amorphous metal at a predetermined temperature to precipitate diamond crystals from the amorphous metal and then separating the phase of the amorphous metal other than the diamond to obtain diamond powder.

Process for the production of diamond powder

To obtain a high-purity aluminum fraction from aluminum containing both eutectic impurities and peritectic impurities, the contents of these impurities in the original aluminum are reduced by melting the original aluminum to obtain molten aluminum, adding boron to the molten aluminum, and rotating a cooling body as immersed in the boron-containing molten aluminum while introducing a cooling fluid to the interior of the body to crystallize high-purity aluminum on the surface of the body. The peritectic impurities react with the boron to form metallic borides, which are centrifugally forced away from the cooling body by the rotation of the body without being incorporated into the aluminum crystallized on the surface of the body. The eutectic impurities are removed from the crystallized aluminum on the surface based on the principle of segregation.

Process for producing high-purity aluminum

In melting aluminum containing impurities which form a eutectic with the aluminum and solidifying the molten aluminum by cooling, the aluminum is purified by breaking down dendrites extending from the liquid-solid interface into the liquid phase to release impurities from between the dendrites or between the branches of the dendrites, and dispersing the released impurities in the entire body of the liquid phase.

Process of preparing aluminum of high purity

Growing community of inventors

Kyoto, Japan

Hideo Shingu