METHOD FOR PRODUCING PHOSPHOR

摘要

PROBLEM TO BE SOLVED: To provide a method capable of readily producing an oxide nitride phosphor or a nitride phosphor having a high nitride ratio by using readily handleable raw materials such as oxides and practicing a kneading step using a planetary ball mill and a sintering step using a gas pressure sintering furnace. SOLUTION: The method for producing the phosphor comprises using a mixture of powders of one or more kinds of nitrides with powders of one or more kinds of oxides or carbonates as a raw material and retaining and sintering the mixture at a high temperature under nitrogen atmosphere. In the production method, reduction of oxygen atom fraction of the phosphor obtained after sintering is carried out and nitrogen atom fraction of the phosphor is increased by adding an additional material binding to oxygen and evaporated at retention temperature during sintering or either temperature of a temperature-raising process leading to the retention temperature to the interior of a sintering furnace. COPYRIGHT: (C)2007,JPO&INPIT