Title:
PRODUCTION OF PARTICLES OF OXIDE OF RARE EARTH ELEMENT
Document Type and Number:
Japanese Patent JP2685687
Kind Code:
B2
Abstract:
PURPOSE: To obtain a phosphor having high luminance and hardly causing flocculation and uneven coating by forming and using angular particles of the oxide of rare earth element uniform in particle diameter, specific surface area and particle size distribution.
CONSTITUTION: The ammonium type oxalate double salt of rare earth element represented by a formula NH4M(C2H4)2.nH2O (where M is the rare earth element and (n) is ≥1) is deposited, separated, washed, heated to 50-100°C in acidic hot water, separated and fired.
Inventors:
Kanayoshi Masami
Tomoyuki Yamada
Kiyoshi Yoshida
Tomoyuki Yamada
Kiyoshi Yoshida
Application Number:
JP11216992A
Publication Date:
December 03, 1997
Filing Date:
April 03, 1992
Export Citation:
Assignee:
Shin-Etsu Chemical Co., Ltd.
International Classes:
C01F17/241; C09K11/78; (IPC1-7): C01F17/00
Domestic Patent References:
| JP5254830A | ||||
| JP5105427A | ||||
| JP6240290B2 |
Attorney, Agent or Firm:
Ryoichi Yamamoto (1 person outside)