Title:
MULLITE CERAMIC AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2011/055642
Kind Code:
A1
Abstract:
Disclosed is a mullite ceramic which is characterized by containing spherical mullite particles having an aspect ratio of 1-2 (inclusive) and needle-like mullite particles having an aspect ratio of more than 2 but 10 or less in a polishing cross-section. The mullite ceramic is also characterized in that the average length of the needle-like particles is 2-10 times the average diameter of the spherical particles and the area ratio of the needle-like particles to all the particles is 0.03-0.3. It is preferable that the area ratio of the coarse needle-like particles having an aspect ratio of more than 10 to all the particles in the polishing cross-section is 0.2 or less. It is also preferable that the mullite ceramic has an apparent porosity of 5-27%.
Inventors:
KAJINO, Hitoshi (Ceramics Division, 3-1, Asamuta-cho, Ohmuta-sh, Fukuoka 17, 〒8360817, JP)
梶野 仁 (〒17 福岡県大牟田市浅牟田町３－１三井金属鉱業株式会社セラミックス事業部内 Fukuoka, 〒8360817, JP)
梶野 仁 (〒17 福岡県大牟田市浅牟田町３－１三井金属鉱業株式会社セラミックス事業部内 Fukuoka, 〒8360817, JP)
Application Number:
JP2010/068748
Publication Date:
May 12, 2011
Filing Date:
October 22, 2010
Export Citation:
Assignee:
Mitsui Mining & Smelting Co., Ltd. (1-11-1, Osaki Shinagawa-k, Tokyo 84, 〒1418584, JP)
三井金属鉱業株式会社 (〒84 東京都品川区大崎１丁目１１番１号 Tokyo, 〒1418584, JP)
KAJINO, Hitoshi (Ceramics Division, 3-1, Asamuta-cho, Ohmuta-sh, Fukuoka 17, 〒8360817, JP)
三井金属鉱業株式会社 (〒84 東京都品川区大崎１丁目１１番１号 Tokyo, 〒1418584, JP)
KAJINO, Hitoshi (Ceramics Division, 3-1, Asamuta-cho, Ohmuta-sh, Fukuoka 17, 〒8360817, JP)
International Classes:
C04B35/18; C04B38/00; F27D1/00
Attorney, Agent or Firm:
HATORI, Osamu (Akasaka HKN BLDG, 6F. 8-6, Akasaka 1-chome, Minato-k, Tokyo 52, 〒1070052, JP)