PROBLEM TO BE SOLVED: To provide a material in which the structural control of composite powder is possible by controlling the distance between particle surfaces, and visible light transmittance and ultraviolet ray shielding properties are enhanced.SOLUTION: The composite particle is composed of a planar or flaky granular substance (mother particle) in which particle size is <30 &mum and the aspect ratio ((the quotient) in division of particle diameter by the particle thickness) is &le100, and a granular substance (child particle) whose particle diameter is <0.1 &mum, applied to the surface of the granular substance (mother particle). The granular substance (mother grain) is made of natural sericite. The granular substance (child grain) is made of rutile type titanium dioxide.COPYRIGHT: (C)2011,JPO&INPIT【課題】粒子表面間距離を制御することで、複合粉体の構造制御が可能で、可視光透過性と紫外線遮蔽性を高める材料を提供する。【解決手段】粒子径30μm未満及びアスペクト比(粒子径の粒子厚さによる除算(商))が100以下の板状又は鱗片状の粒状物質(母粒子)と、該粒状物質(母粒子)の表面に被覆する粒径0.1μm未満の粒状物質(子粒子)とからなる複合粒子である。粒状物質(母粒子)は天然セリサイトからなる。粒状物質(子粒子)はルチル型酸化チタンからなる。【選択図】図4
