COMPOSITE POWDER WITH PHOTOCHROMIC EFFECT AND THE METHOD FOR PREPARING THEREOF

摘要

Composite powder with a photochromic effect and a manufacturing method thereof are provided to secure high customer's opinion after product use and to mass-produce the composite powder as a cosmetic material. A method for manufacturing composite powder comprises the following steps of: dissolving a surfactant in distilled water and a transition metal precursor in an acid and mixing them; adding a silica precursor to the mixture and adjusting until the pH becomes neutralized; hydrothermal-reacting to the mixture; filtering, washing and drying the mixture; calcining the mixture; dissolving a metal precursor in distilled water or alcohol; mixing the dissolved metal precursor and the calcined mixture; and drying and calcining the mixture.