MANUFACTURING METHOD OF METAL BORIDE FINE POWDER

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PROBLEM TO BE SOLVED : To provide a stable manufacturing method of a metal boride fine powder molding a thin film or a molded body having high transparency and also excellent conductivity and heat ray shielding property. SOLUTION : The manufacturing method of the fine powder of the metal boride is composed of a first heat treating step wherein boron oxide and carbon are added to an oxide of at least one kind of metal selected from among a rare earth metal, a group IVa transition metal, a group Va transition metal and a group VIa transition metal, and wherein the carbon is added in an atomic ratio of ≥1.3 to the sum of the oxygen originated from the metal oxide and the boron oxide, and the mixture is fired in an inert gas atmosphere, a second heat treating step wherein a residual carbon is oxidized and decomposed at a temperature T2 lower than a temperature T1 in the first heat treating step and a third heat treating step wherein the treated matter is fired at a temperature lower than T1 and higher than T2 in the inert gas atmosphere. COPYRIGHT : (C)2008, JPO&INPIT