INORGANIC COMPOUND HAVING BOTH PHOTOCHROMIC PROPERTIES AND NEAR INFRARED RAY ABSORPTION PROPERTIES, AND PRODUCTION METHOD THEREFOR

摘要

The present invention relates to an inorganic compound having both photochromic properties and near infrared ray absorption properties, and a production method therefor, and particularly, to an inorganic compound having both photochromic properties and near infrared ray absorption properties, and to a production method therefore, wherein the method comprises: a metal salt dissolution step of forming a polyol mixed solution by adding metal salt and transition metal salt to polyol solvent; a deflocculating agent dissolution step of forming a deflocculating agent mixed solution by adding a deflocculating agent to the polyol mixed solution formed in the metal salt dissolution step; a water mixing step of forming a water mixed solution by adding water to the deflocculating agent mixed solution formed in the deflocculating agent dissolution step; an inorganic compound synthesis step of producing an inorganic compound by using microwaves to heat the water mixed solution formed in the water mixing step; an impurity removal step of removing impurities except for the inorganic compound from the product of the inorganic compound synthesis step; and a crystallization step of forming a crystallized inorganic compound through the heat treatment of the inorganic compound from which impurities have been removed in the impurity removal step. The inorganic compound has the properties of becoming discolored by sunlight or ultraviolet rays irradiated thereon, and of absorbing near infrared rays after becoming discolored. The inorganic compound can be produced in a shorter time, has uniform properties, and can be used to reduce the amount of organic solvent in use.