Title:
MANUFACTURE OF FLORESCENT CERAMIC
Document Type and Number:
Japanese Patent JPH02212586
Kind Code:
A
Abstract:
PURPOSE: To make it possible to effectively recover a decrease in light output due to machining without a causing dimensional change and a damage by machining a specified fluorescent ceramic sinter activated with a rare earth element, followed by heat treatment.
CONSTITUTION: A fluorescent ceramic sinter activated with a rare earth element, composed mainly of a rare earth oxysulfide of the formula (wherein M is at least one rare earth element) (e.g. Gd2O2S:Pr), is machined to give a workpiece of a desired shape. This workpiece is heated at 200-600°C for at least 10min, preferably 1-15hr, preferably in a lowly oxidizing atmosphere or in an inert gas atmosphere.
Inventors:
MATSUDA NAOHISA
TAMAYA MASAAKI
YOKOTA KAZUTO
TOYOSHIMA MASANORI
TAMAYA MASAAKI
YOKOTA KAZUTO
TOYOSHIMA MASANORI
Application Number:
JP3192889A
Publication Date:
August 23, 1990
Filing Date:
February 10, 1989
Export Citation:
Assignee:
TOSHIBA CORP
International Classes:
G01T1/20; C09K11/00; C09K11/84; (IPC1-7): C09K11/00; G01T1/20
Attorney, Agent or Firm:
Saichi Suyama