| 摘要 |
An oxynitride-based fluorescent material is formed of what results from substituting Eu for part of M of a general formula M<SUB>3</SUB>Si<SUB>2</SUB>N<SUB>2</SUB>O<SUB>4</SUB>, 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, silicon nitride or a compound enabled by heating to form silicon nitride, and silicon oxide or a compound enabled by heating to form silicon oxide to obtain a mixture and firing the mixture in a vacuum or a non-oxidizing atmosphere at 1200 to 1900° C.
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