OXYNITRIDE POWDER AND METHOD FOR PRODUCING SAME - NATIONAL INSTITUTE FOR MATERIALS SCIENCE

Title:

OXYNITRIDE POWDER AND METHOD FOR PRODUCING SAME

Document Type and Number:

WIPO Patent Application WO/2005/102921

Kind Code:

A1

Abstract:

Disclosed is a method for producing an oxynitride powder (such as a Ca-containing &agr sialon powder) wherein a precursor compound containing at least M, Si Al and O elements (with M being one element or a mixture of two or more elements selected from the group consisting of Li, Mg, Ca, Sr, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu) is heated in a reducing-nitriding atmosphere, thereby reducing the oxygen content of the precursor compound while increasing nitrogen content thereof. Also disclosed is an oxynitride powder obtained by such a method. By this method, there can be obtained an oxynitride powder mainly containing a fine &agr sialon powder which is preferably used for phosphors and free from coloring caused by inclusion of impurities.

Inventors:

Hirosaki, Naoto (C/O NATIONAL INSTITUTE FOR MATERIALS SCIENCE, 2-1 Sengen 1-chome, Tsukuba-sh, Ibaraki 47, 30500, JP)
Suehiro, Takayuki (C/O NATIONAL INSTITUTE FOR MATERIALS SCIENCE, 2-1 Sengen 1-chome, Tsukuba-sh, Ibaraki 47, 30500, JP)

Application Number:

PCT/JP2005/008313

Publication Date:

November 03, 2005

Filing Date:

April 22, 2005

Export Citation:

Click for automatic bibliography generation Help

Assignee:

NATIONAL INSTITUTE FOR MATERIALS SCIENCE (2-1 Sengen 1-chome, Tsukuba-shi Ibaraki, 47, 30500, JP)
Hirosaki, Naoto (C/O NATIONAL INSTITUTE FOR MATERIALS SCIENCE, 2-1 Sengen 1-chome, Tsukuba-sh, Ibaraki 47, 30500, JP)
Suehiro, Takayuki (C/O NATIONAL INSTITUTE FOR MATERIALS SCIENCE, 2-1 Sengen 1-chome, Tsukuba-sh, Ibaraki 47, 30500, JP)

International Classes:

C04B35/599; C01B21/082; C04B35/597; C04B35/628; C09K11/08; C09K11/59; C09K11/64; C09K11/77; C09K11/79; C09K11/80; C04B35/597; C01B21/00; C04B35/626; C09K11/08; C09K11/59; C09K11/64; C09K11/77; (IPC1-7): C01B21/082; C04B35/599

Attorney, Agent or Firm:

Moritake, Yoshiaki (TOKYO-CHIZAI PATENT OFFICE, Kita-yaesu Bldg. 3rd Floor 2-11, Nihonbashi 3-Chome, Chuo-K, Tokyo 27, 10300, JP)

Download PDF:

View/Download PDF PDF Help

Previous Patent: METHOD FOR THE PRODUCTION OF CHLORINE DIOXIDE FOR DISINFECTION PURPOSES AND PREPARATION THEREFOR

Next Patent: CARBON-BASED FINE STRUCTURE GROUP, AGGREGATE OF CARBON BASED FINE STRUCTURES, USE THEREOF AND METHOD...