Modified boron nitride powder
A technology of boron nitride and powder, which is applied in the field of modified boron nitride powder, and can solve problems such as ductility and insufficient adhesion
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Embodiment 1
[0135] A mixture of the following formulations was prepared using a ball mill.
[0137] Carbon black 30g
[0139] This mixture was placed in a graphitic Taman furnace, heated up to 1500°C at 15°C / min under a nitrogen atmosphere, kept at 1500°C for 6 hours for reduction and nitriding treatment, and then heated to 1800°C at 15°C / min , kept at 1800° C. for 2 hours for crystallization treatment, and obtained coarse hexagonal boron nitride powder.
[0140] Next, the obtained crude hexagonal boron nitride powder was put into a container made of polyethylene, and an aqueous hydrochloric acid solution (10 mass % HCl) was added in an amount 10 times that of the crude hexagonal boron nitride, and stirred at a rotation speed of 300 rpm for 15 hours.
[0141] After the above-mentioned acid cleaning, the acid was filtered, washed again with pure water having a resistivity of 1 MΩ·cm at 25°C in an amount 300 times that of the input ...
Embodiment 8
[0155] In the same manner as in Example 1, coarse hexagonal boron nitride powder was obtained.
[0156] Next, the obtained crude hexagonal boron nitride powder was put into a container made of polyethylene, an aqueous hydrochloric acid solution (10% by weight HCl) was added in an amount 10 times that of the crude hexagonal boron nitride, and stirred at a rotation speed of 300 rpm for 15 hours. After the acid cleaning, the acid was filtered, washed again with pure water having a resistivity of 1 MΩ·cm at 25° C. in an amount 300 times that of the input coarse hexagonal boron nitride, and then dehydrated by suction filtration until The water content in the filtered powder was 50 wt% or less.
[0157] After washing with pure water, the obtained powder was dried under reduced pressure at 200° C. for 15 hours under a pressure of 1 kPaA to obtain a white boron nitride powder. This boron nitride powder had many agglomerates.
[0158] For this boron nitride powder, in order to ascert...
Embodiment 9
[0162]
[0163]The type of inert gas, the flow rate of the inert gas, and the treatment temperature in the modification of Example 8 were changed to those shown in Table 2 to obtain modified boron nitride powder. Table 4 shows the measurement results for the modified boron nitride powder.
[0164] [Table 1]
[0165]
[0166] [Table 2]
[0167]
[0168] [table 3]
[0169]
[0170] [Table 4]
[0171]
[0172] [table 5]
[0173]
[0174] [Table 6]
[0175]
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Abstract
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