| 摘要 |
PROBLEM TO BE SOLVED: To provide a silica spherical particle containing substantially no organic component, free from forming firm aggregation and capable of being easily dispersed in a resin, and the like, as submicron particles having uniform particle-size distribution. SOLUTION: The silica spherical particle has 0.1-0.5μm average particle diameter in an aqueous dispersion state and≤26% particle size distribution coefficient S calculated by formula (I): S(%)=(particle diameter standard deviation/average particle diameter)×100 in the particle diameter range and satisfies formula (II): S(%)=aX+b, wherein X represents an average particle diameter (μm), a represents -10 to -6 and b represents 15-27. COPYRIGHT: (C)2009,JPO&INPIT
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