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

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Reaction Steps

First, 70 kg of orthoboric acid, 50 kg of melamine, and 1 kg of calcium carbonate were mixed by a Henschel mixer. Next, the mixture was placed in a constant temperature and humidity chamber at a temperature of 80° C. and a relative humidity of 80% for 2 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 1750° C. for 2 hours to yield boron nitride with a graphitization index (GI) of 3.95 and a specific gravity of 2.27 g/cm3. After that, grinding was adjusted to prepare D-6 with a volume-average particle diameter of 18.0 μm.

Provenance & Evidence