Sr3Al3Si13O2N21 - SILICON NITRIDE POWDER FOR SILICONITRIDE FLUORESCENT MATERIAL SR3AL3SI13O2N21 FLUORESCENT MATERIAL AND -SIALON FLUORESCENT MATERIAL BOTH OBTAINED USING SAME AND PROCESSES FOR PRODUCING THESE

摘要

Silicon nitride powders for use in a fluorescent display tube (VFD), a field emission display (FED), a plasma display panel (PDP), a cathode ray tube (CRT) and a light emitting diode (LED) ₃ Al ₃ Si ₁₃ O ₂ N ₂₁ -based phosphors, β-sialon phosphors, and a method of manufacturing them. The present invention relates to a crystalline silicon nitride powder used as a raw material for producing a silicon nitride phosphor and a silicon nitride phosphor containing a nitrogen element and an oxygen element and having an average particle diameter of 1.0 to 12 μm and an oxygen content of 0.2 to 0.9% And a silicon nitride powder for a silicon nitride phosphor.