Title:
PRODUCTION OF INFRARED-VISIBLE RAY CONVERSION PHOSPHOR
Document Type and Number:
Japanese Patent JP2698857
Kind Code:
B2
Abstract:
PURPOSE: To produce the title phosphor within a shorter production time while preventing its properties from being deteriorated by oxidation caused by the oxygen get mixed in the sintering atmosphere due to careless handling in its production.
CONSTITUTION: The title process comprises the steps of: mixing a powdery alkaline earth metal chalcogenide phosphor A containing at least one element selected from among europium, cerium, manganese and copper with a powdery alkaline earth metal chalcogenide phosphor B containing at least one element selected from among samarium, bismuth and lead, and fusing the phosphor A powder with the phosphor B powder together by heating the resulting mixture under pressure. Thus, the title phosphor which can be produced within a shorter production time and does not deteriorate so much in its properties in a sintering process can be provided by mixing the phosphor containing the principal activator with the phosphor containing the subsidiary activator and heating the resulting mixture under pressure.
Inventors:
Tamura Yasuaki
Junichi Ohwaki
Shibukawa Atsushi
Junichi Ohwaki
Shibukawa Atsushi
Application Number:
JP27892491A
Publication Date:
January 19, 1998
Filing Date:
October 01, 1991
Export Citation:
Assignee:
Nippon Telegraph and Telephone Corporation
International Classes:
C09K11/56; C09K11/88; (IPC1-7): C09K11/56; C09K11/88
Domestic Patent References:
| JP551580A | ||||
| JP439385A | ||||
| JP439384A |
Attorney, Agent or Firm:
Amamiya Masaki