METHOD FOR COATING CORE MATERIALS WITH METALLIC OXIDE BY CHEMICAL SOLUTION PROCESSES AND CORE-SHELL STRUCTURE THEREFROM

摘要

PURPOSE: A method for coating a core material with a metal oxide is provided to uniformly coat a metal oxide without the precipitation of the core material in a chemical solution and to easily control the thickness of a metal oxide shell part. CONSTITUTION: A method for coating a core material with a metal oxide comprises a step of forming a core material solution by dispersing a core material with a particle diameter of 500 nm - 100 um into an octadecene solvent; a step of forming a solution containing a metal-oleate salt which is a shell precursor material, by adding a metal salt, a hexane, and an oleate into a mixed solvent of distilled water and an ethanol and conducting the reaction of the added mixture; a step of manufacturing a coating solution by separating a hexane layer from the solution and adding the octadecene solvent into the metal-oleate salt which is a remnant after evaporating the hexane; and a step of coating the core material with a metal oxide by heating the core material solution and the coating solution with a ultrasonic wave disperser in an insert gas atmosphere. [Reference numerals] (AA) Mount an ultrasonic wave disperser on a reactor; (BB) Ultrasonic wave disperser; (CC) Gas inlet; (DD) Temperature controller; (EE) Condenser; (FF) Controller for the ultrasonic wave disperser; (GG) Temperature detection