Boric Acid → Orthoboric acid, compound with 1,3,5-triazine-2,4,6-triamine (1:1)

참여 물질

반응 단계

First, 40 kg of anhydrous orthoboric acid, manufactured by Showa Chemical Industry Co., Ltd. (hereinafter, this product was used as anhydrous boric acid), 50 kg of melamine, and 1 kg of calcium borate, manufactured by KINSEI MATEC CO., LTD., were mixed by a Henschel mixer. Next, the mixture was placed in a constant temperature and humidity chamber at a temperature of 90° C. and a relative humidity of 85% for 5 hours to produce melamine borate. Then, the melamine borate was subjected to calcination and crystallization in a batch atmosphere furnace under a nitrogen atmosphere at 1900° C. for 2 hours to yield boron nitride with a graphitization index (GI) of 4.58 and a specific gravity of 2.27 g/cm3. After that, grinding was adjusted to prepare D-7 with a volume-average particle diameter of 18.0 μm.

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