Sumitomo Electric Industries, Limited

Sumitomo Electric Hardmetal Corp.

A.l.m.t. Corporation

Nagoya University

Takuya Okuno

Akihiko Ikegaya

Yoshiharu Yamamoto

Kazuo Sasaya

Hiroshi Suganuma

Hideki Moriguchi

Kazuhiro Hirose

Ichiro Sogawa

Akinori Kimura

Syunsuke Yamanaka

Fumiatsu Sato

Hideaki Ito

Takeshi Itakura

There are provided a microparticle measuring device capable of analyzing microparticles with increased accuracy and a microparticle analysis method. According to a microparticle measuring device, transmission images of microparticles in the liquid sample are captured by a plurality of image capturing units that are disposed in mutually different orientations with respect to a liquid feed pipe when viewed in a cross section orthogonal to the flowing direction of a liquid sample in the liquid feed pipe, and the microparticles are analyzed by an analyzing unit on the basis of the transmission images.

Microparticle measuring device and microparticle analysis method

A method for producing an ammonium tungstate aqueous solution includes the steps of: adding sulfuric acid to a solution containing tungstate ions; bringing the solution having the sulfuric acid added therein, into contact with an anion exchange resin; and bringing the anion exchange resin into contact with an aqueous solution containing ammonium ions.

Method for producing ammonium tungstate aqueous solution

There are provided a cemented carbide high in thermal diffusivity and excellent in wear resistance, and a cutting tool including a base material formed of this cemented carbide. The cemented carbide is a WC based cemented carbide in which a hard phase mainly constituted of WC grains is bound by a binder phase mainly constituted of Co, and is used for a cutting tool. The binder phase is substantially constituted of Co, or Co and Ni. A total content of Co and Ni is not less than 4.5 mass % and not more than 15 mass %. In this cemented carbide, the WC grains have an average diameter of not less than 0.4 &#x3bc;m and not more than 4 &#x3bc;m.

Cemented carbide and cutting tool using same

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Itami, Japan

Takuya Okuno