Silicate-based phosphor for ultraviolet and long wavelength excitation and method for producing the same

摘要

This invention regards the ultraviolet ray and the fluorescent substance and the production method for long wave long excitation. Furthermore as for details, being the fluorescent substance precusor which consists with of strontium, barium, zinc, the silica and the rare earth metal, color coordinate is, x=0.50 - 0.64 in order to be obtained in the y=0.38 - 0.51 ranges, the aforementioned barium and the ultraviolet ray and the fluorescent substance and the aforementioned fluorescent substance precusor which for long wave long excitation optimize the ratio of zinc heat treatment under the mixed gas atmosphere where nitrogen and hydrogen are mixed at ratio of specification, regards the production method of the ultraviolet ray and the fluorescent substance for long wave long excitation. Because heat treatment of low temperature is possible, you do not use the flux which decreases burning temperature, in addition without using the toxic material the occasion where it applies to the diode or Liquid Crystal Display, you regard luminous quality and of displaying efficiency the ultraviolet ray and the fluorescent substance and the production method for long wave long excitation of being superior.