Reaction equation
[B:1]([OH:4])([OH:3])[OH:2].[N:5]1[C:12]([NH2:13])=[N:11][C:9]([NH2:10])=[N:8][C:6]=1[NH2:7].B([O-])([O-])[O-].[Ca+2].B([O-])([O-])[O-].[Ca+2].[Ca+2].C([O-])([O-])=O.C([O-])([O-])=O.[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2]>>[B:1]([OH:4])([OH:3])[OH:2].[N:5]1[C:12]([NH2:13])=[N:11][C:9]([NH2:10])=[N:8][C:6]=1[NH2:7]Participants
Procedure
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.
Workup
- addition, were mixed by a Henschel mixer
- customwas placed in a constant temperature and humidity chamber at a temperature of 90° C.
Sources & evidence
- ORD record
- ord-c044491450e7499fad5c6c225c1e8f3e
- Source dataset
- uspto-grants-2013_10
- Patent number
- US08557905B2
Linked notes
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