| 摘要 |
PROBLEM TO BE SOLVED: To provide a phosphor wherein brightness degradation can be more suppressed. SOLUTION: Ten grams of a SrTiO3 : Pr, Al powder (particles of a plurality of crystals) is dispersed in a diluted hydrochloric acid solution in which strontium chloride and titanium chloride are dissolved. The dispersion is subjected to drying followed by pulverization to form a powder. The powder is put in an alumina crucible and baked in air to form a phosphor wherein a protection part composed of SrTiO3 is partly formed on the surface of a SrTiO3 : Pr, Al crystal particle.
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