Oxynitride-based fluorescent material and method for production thereof
AssigneeShowa Denko K.K.
InventorKousuke Shioi
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Abstract
An oxynitride-based fluorescent material is formed of what results from substituting Eu for part of M of a general formula 2MO.Si3N4, wherein M denotes one or more elements selected from among Be, Mg, Ca, Sr and Ba. The oxynitride-based fluorescent material can be produced by a method comprising mixing an oxide of Be, Mg, Ca, Sr, Ba or Eu, or a compound of Be, Mg, Ca, Sr, Ba or Eu enabled by heating to form an oxide, and silicon nitride or a compound enabled by heating to form silicon nitride to obtain a mixture and firing the mixture in a vacuum or a non-oxidizing atmosphere at 1200 to 1900° C.
Claims11
An oxynitride-based fluorescent material formed of what results from substituting Eu for part of M of a general formula 2MO.Si3N4, wherein M denotes one or more elements selected from among Be, Mg, Ca, Sr and Ba.
Dependencies are inferred from the claim text.