Mitsui Mining Co., Ltd.

Mitsui Mining Material Co., Ltd.

Katsusuke Iwanaga

Kazuhiro Watanabe

Kenji Fukuda

Tatsuo Umeno

Tadanori Tsunawaki

Youichiro Hara

Osamu Matsunaga

Keiichiro Koba

Yutaka Kagawa

Yoshinori Yasumoto

Takashi Hiruta

Taizo Utsunomiya

Yoshiaki Saitow

Michihiko Matsue

Yoshinobu Komatsubara

Noriaki Nishitani

The present invention discloses an oxide ceramic fiber/oxide ceramic composite material comprising primary composite materials each consisting of (a) an assembly of ceramic fibers composed mainly of a metal oxide and (b) a metal oxide ceramic which includes the ceramic fiber assembly (a) therein, the metal oxide of the ceramic (b) being different from the main component metal oxide of the ceramic fiber assembly (a) and the amount of the metal oxide ceramic (b) being 1 to 85% by weight relative to the weight of the ceramic fiber assembly (a), and a metal oxide ceramic which is a matrix for the primary composite materials and which includes the primary composite materials therein, the metal oxide of the ceramic being the same as or different from the main component metal oxide of the ceramic fiber assembly (a); and a process for producing thereof.

Oxide ceramic fiber/oxide ceramic composite material and process for production thereof

Anode material for lithium secondary battery, process for production thereof, and lithium secondary battery

Disclosed is a process for continuously producing highly flexible long .alpha.-alumina fibers of small diameter according to the slurry spinning technique. Also disclosed are a specific spinnable slurry containing an alumina powder having an average particles diameter of 0.1 .mu.m or less, the specific thermophysical conditions under which the slurry is spun into a multifilament yarn, and the well-balanced residence time conditions under which the multifilament yarn running as a single continuous fiber is prefired and fired to form a long .alpha.-alumina fiber.

Continuous process for producing long .alpha.-alumina fibers

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Tochigi, Japan

Katsusuke Iwanaga