High Level Product Black Silicon Carbide Powder

A wear-resistant silicon nitride/silicon carbide ceramic and a preparation method and application thereof. The method comprises the following steps: immersing an αSiC block in a liquid containing black silicon carbide powder or organic carbon, so that the carbon black micropowder or organic carbon penetrates into the pores of the αSiC block; drying the carbon black micropowder or carbonizing the organic carbon at 300-800°C to obtain an αSiC block-carbon powder mixture; sintering the mixture with metal silicon at 1420-1700°C under vacuum or inert atmosphere to obtain a siliconized reaction sintered SiC block; crushing and/or grading the mixture after cooling to obtain siliconized reaction sintered SiC particles; mixing the siliconized reaction sintered SiC particles, αSiC particles, metal silicon and a binder into a ceramic material and then forming the ceramic blank; introducing pure nitrogen to perform a nitridation reaction at 1300-1420°C; and cooling to obtain a wear-resistant silicon nitride/silicon carbide composite ceramic.

1.A quick-drying explosion-proof high-strength wear-resistant castable, a quick-drying explosion-proof high-strength wear-resistant castable, comprising the following components in weight percentage: GL85 bauxite 5-3mm, 24-30%; GL85 bauxite 3-1mm, 20-24%; GL85 bauxite 1-0mm, 8-12%; 90 black silicon carbide 1-0mm, 8-12%; 90 black silicon carbide powder ≤0.088mm, 6-10%; 93 brown corundum powder ≤0.088mm, 15-20%; 92 silicon powder, 2-6%; αAlO powder Powder, 4-6%; aluminate cement, 4-7%; steel fiber 3-5mm, 1.0-1.5%; composite explosion-proof agent 0.06-0.10%; composite additive 0.20-0.40%. With 85 bauxite and silicon carbide as the main materials, the ultrafine powder is combined to determine the reasonable particle grading. Under the premise of ensuring wear resistance, the densest stacking is achieved, with good fluidity and easy construction. At the same time, adding metal aluminum powder and explosion-proof fiber as a composite explosion-proof agent can effectively avoid bursting during baking, greatly enhancing the safety and reliability of use.

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