Sakai Chemical Industry Co., Ltd.

Tohoku University

Fuji Ceramics Corporation

Hideto Mizutani

Satoru Sueda

Atsuki Terabe

Atsushi Muramatsu

Kiyoshi Kanie

Hirofumi Takahashi

Yasuhiro Okamoto

Kazunobu Abe

Kazuhiko Nagano

Minoru Yoneda

Kiyoshi Fukai

Shigefumi Kamisaka

Hiroshi Nakao

Tsutomu Hatanaka

Shinji Ohgama

Seiichi Yano

Toshihiro Sugaya

Takahiro Kawataki

Chiyo Honda

Hiroyoshi Urasumi

Provided is a method of producing fine particulate barium calcium titanate in which calcium forms a homogeneous solid solution. The present invention relates to a method of producing a perovskite compound represented by the following formula (1):BaATiO  (1)

Method for producing perovskite compound, and perovskite compound

Disclosed are a method of producing fine particulate alkali metal niobate in a liquid phase system, wherein the size and shape of the particulate alkali metal niobate can be controlled; and fine particulate alkali metal niobate having a controlled shape and size. One of specifically disclosed is a method of producing a substantially rectangular cuboid particulate alkali metal niobate represented by MNbO(1), wherein M represents one element selected from alkaline metals, including specific four steps. Another one of specifically disclosed is particulate alkali metal niobate represented by the formula (1) having a substantially rectangular cuboid shape, wherein the substantially rectangular cuboid shape has a longest side and a shortest side, the length of the longest side represented by an index Lis 0.10 to 25 &#x3bc;m, and the length of the shortest side represented by an index Lis 0.050 to 15 &#x3bc;m.

Method for producing alkali metal niobate particles, and alkali metal niobate particles

Disclosed are a method of producing fine particulate alkali metal niobate in a liquid phase system, wherein the size and shape of particles of the fine particulate alkali metal niobate can be controlled; and fine particulate alkali metal niobate having a controlled shape and size. Specifically disclosed are a method of producing particulate sodium-potassium niobate represented by the formula (1): NaKNbO(1), the method including four specific steps, wherein a high-concentration alkaline solution containing Naion and Kion is used as an alkaline solution; and particulate sodium-potassium niobate having a controlled shape and size.

A process for the production of fine powder of metallic nickel which comprises a first step of dissolving nickel carbonate and/or nickel hydroxide in aqueous ammonia or in an aqueous solution of ammonia and at least one selected from the group consisting of ammonium carbonate, ammonium hydrogencarbonate, a carbonate of an alkali metal and a hydrogencarbonate of an alkali metal to prepare an aqueous solution of a nickel salt; converting the aqueous solution of a nickel salt to a W/O emulsion, and then removing volatile components including ammonia from the droplets to form precipitates of nickel carbonate in the droplets, thereby providing fine spherical particles of nickel carbonate; and a second step of heating the particles of nickel carbonate in the presence of a fusion preventive agent that is a compound of at least one element selected from the group consisting of alkaline earth elements, aluminum, silicon and rare earth elements in an atmosphere of hydrogen, thereby reducing the nickel carbonate to metallic nickel.

Method for producing fine powder of metallic nickel comprised of fine spherical particles

Method for producing fine spherical particles of carbonate or hydroxide of nickel, cobalt or copper

Growing community of inventors

Iwaki, Japan

Hideto Mizutani