SILICON NITRIDE POWDER FOR SILICONITRIDE PHOSPHOR, CaAlSiN₃ PHOSPHOR USING SAME, Sr₂Si₅N₈ PHOSPHOR USING SAME, (Sr, Ca)AlSiN₃ PHOSPHOR USING SAME, La₃Si₆N₁₁ PHOSPHOR USING SAME, AND METHODS FOR PRODUCING THE PHOSPHORS

摘要

Provided are: a silicon nitride powder for a siliconitride phosphor with higher luminance, which is used for a fluorescent display tube (VFD), a field emission display (FED), a plasma display panel (PDP), a cathode ray tube (CRT), a light emitting diode (LED) and the like; a CaAlSiN₃ phosphor, an Sr₂Si₅N₈ phosphor, an (Sr, Ca)AlSiN₃ phosphor and an La₃Si₆N₁₁ phosphor, each using the silicon nitride powder; and methods for producing the phosphors. The present invention relates to: a silicon nitride powder for a siliconitride phosphor, which is characterized by being a crystalline silicon nitride powder that is used as a starting material for producing a siliconitride phosphor that contains silicon element and nitrogen element but does not contain oxygen element as a constituent element, and which is characterized by having an oxygen content of 0.2-0.9 wt%; a CaAlSiN₃ phosphor, an Sr₂Si₅N₈ phosphor, an (Sr, Ca)AlSiN₃ phosphor and an La₃Si₆N₁₁ phosphor, each using the silicon nitride powder; and methods for producing the phosphors.