| abstract |
(57) [Abstract] [Problem] Dispersibility, lubricity, transparency, weather resistance, heat resistance, Provided are boron nitride / oxide composite particles and boron nitride / composite oxide composite particles which are excellent in ultraviolet blocking properties. An oxide, a composite oxide, or a mixture thereof is dispersed in an aqueous solution or an alcohol solution in which boric acid and urea are dissolved, and then the solvent is evaporated, and the obtained precursor is heated in a non-oxidizing atmosphere. By doing, dispersibility, lubricity, A boron nitride-oxide composite particle or a boron nitride-composite oxide composite particle having excellent transparency, weather resistance, heat resistance, and ultraviolet blocking properties. |