Aluminum nitride powder as well as preparation method and application thereof
An aluminum nitride and powder technology, applied in the field of aluminum nitride powder and its preparation, can solve the problems of insufficient carbothermic reduction reaction, affecting the contact of reaction gas, and poor gas path, etc., and achieves easy batch-to-batch performance. The effect of controlling, improving process capacity, and mixing fully and uniformly
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[0033] Example 1
[0034] a, the α-Al 2 O 3 The particles and petroleum carbon black are placed in a dry ball mill for 2 hours according to the mass ratio of 2:1 to obtain a mixed powder;
[0035] b. The mixed powder, PVA and deionized water are mixed and granulated according to the mass ratio of 10:1.5:7, and the granulated particles are placed in a drying oven for debinding, and a precursor with an average particle size of 2-10mm is prepared Particles
[0036] c. The precursor particles are fed into a vertical graphite continuous synthesis furnace for continuous reaction in a nitrogen atmosphere to produce carbon-containing aluminum nitride particles, where the reaction temperature in the furnace is 1600°C, and the pressure in the furnace is 1000 Pa; the precursor The bulk particles naturally fall through the high temperature zone in the furnace from top to bottom. The residence time in the high temperature zone is 6h and the flow rate is 6m. 3 / The nitrogen of h flows through the...
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[0038] Example 2
[0039] a, the α-Al 2 O 3 The particles and natural carbon black are put into a dry ball mill for 5 hours according to a mass ratio of 1.5:1 to obtain a mixed powder;
[0040] b. Mix and granulate the mixed powder, phenolic resin and deionized water according to the mass ratio of 10:0.5:8, and put the granulated particles in a drying oven for debinding to prepare a precursor with an average particle size of 2-10mm Body particles
[0041] c. The precursor particles are fed into a vertical graphite continuous synthesis furnace for continuous reaction in a nitrogen atmosphere to produce carbon-containing aluminum nitride particles, where the reaction temperature in the furnace is 1800°C, and the pressure in the furnace is 2000 Pa; the precursor The bulk particles naturally fall through the high temperature zone in the furnace from top to bottom, staying in the high temperature zone for 15h, and the flow rate is 18m 3 / H nitrogen flows through the high temperature zone...
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[0043] Example 3
[0044] a, the α-Al 2 O 3 The particles and acetylene carbon black are placed in a dry ball mill for 8 hours according to a mass ratio of 2.5:1 to obtain a mixed powder;
[0045] b. Mix the mixed powder, epoxy resin and anhydrous ethanol in a mass ratio of 10:2:4 and then granulate. Put the granulated particles into a drying oven for degumming to prepare an average particle size Precursor particles of 2~10mm;
[0046] c. The precursor particles are fed into a vertical graphite continuous synthesis furnace for continuous reaction in a nitrogen atmosphere to produce carbon-containing aluminum nitride particles, where the reaction temperature in the furnace is 1700°C, and the pressure in the furnace is 2000 Pa; The bulk particles naturally fall through the high temperature zone in the furnace from top to bottom. The residence time in the high temperature zone is 10h and the flow rate is 10m. 3 / The nitrogen of h flows through the high temperature zone from bottom to t...
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