PROBLEM TO BE SOLVED: To provide a silica-coated mixed crystal oxide particle which is covered with a dense and practical silica film and has improved dispersibility and transparency, a method for economical production thereof, and also to provide a cosmetic for ultraviolet shielding good in dispersion of the above particle, particularly excellent in transparency and storage stability.SOLUTION: There are provided a silica-coated mixed crystal oxide particle in which the surface of the mixed crystal oxide particles having BET specific surface area of 10-200 m2/g and containing primary particles in a mixed crystal state is covered with a dense and thin film silica, and its production method. The invention also relates to a cosmetic using the silica-coated mixed crystal oxide particles obtained by the above production method.COPYRIGHT: (C)2007,JPO&INPIT【課題】緻密で実用的なシリカ膜で被覆され、かつ分散性及び透明性が向上したシリカ被覆混晶酸化物粒子及びその経済的な製造法、さらにシリカ被覆混晶酸化物粒子が良好に分散し、特に透明感と保存安定性に優れた紫外線遮蔽用化粧料を提供すること。【解決手段】BET比表面積が10~200m2/gで混晶状態の一次粒子を含む混晶酸化物粒子の表面が緻密な薄膜シリカにより被覆されていることを特徴とするシリカ被覆混晶酸化物粒子およびその製造方法、該製造方法により得られるシリカ被覆混晶酸化物粒子を用いた化粧料。【選択図】 なし
