ホウ酸メラミンの熱分解によるBNの生成

概要

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The formation of h BN by thermal decomposition of melamine diborate was examined by XRD, IR and ther mal analysis. The melamine diborate, which was precipitated as white powders by cooling a hot solu tion of melamine and boric acid, was presumed to have a monoclinic structure with a=2.0259 nm, b=1.4180 nm, c=0.3504 nm, β=92.40° and its solubility in 100 cm^3 water was about 0.6 g at room temperature. On de hydration, the crystalline diborate was converted to an amorphous solid at the temperature ranges from 100 to 200℃ The melamine component decomposed at about 300℃, and the formation of BN skeletons occurred above 600℃. Turbostatic BN with 60% Purity, which was obtained at 900℃, was well crystallized by further heating at 2000℃, accompanied by grain growth and purification.
社団法人日本セラミックス協会の論文
1994-11-01