The hardness of black silicon carbide is greater than fused alumina but less than synthetic diamond.

硬度黑碳化硅大于熔融氧化铝,但少于人造金刚石.

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The main material of brown fused alumina is bauxite, which is eletrically fused in high temperature.

棕刚玉是以铝矾土为主要原料,经高温熔炼而成.

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Its mechanical intensity is greater than fused alumina, but is brittle and very sharp.

其力学强度大于熔融氧化铝, 但脆性也很尖锐.

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The main material of brown fused alumina is bauxite, which is electrically fused in high temperature.

棕刚玉磨料以铝矾土为主要原料经高温熔炼而成.

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