| 摘要 |
PROBLEM TO BE SOLVED: To provide a process for preparing a phosphor particle which has narrow particle size distribution, contains a few agglomerated particles, has a globular shape or a shape close to this, has a high purity and a uniform chemical composition and shows excellent luminous properties with a small energy consumption. SOLUTION: In the process for preparing a phosphor particle from a solution containing a metal element constituting a phosphor, using a nozzle which has a phorality of solution channels and a piezoelectric element head 3 or a thermal head at its tip part 1, the above-mentioned phosphor material solution 5 is discharged from the nozzle as fine droplets 6 into a gas atmosphere. The droplets are dried, heated and subjected to pyrolysis synthesis.
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