金刚砂
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(金(jīn )刚(gāng )砂(shā ),金(jīn )刚(gāng )砂(shā ))
不(bú )纯(chún )的(de )碳(tàn )化(huà )硅(guī )。硬(yìng )度(dù )仅(jǐn )次(cì )于(yú )金(jīn )刚(gāng )石(shí ),质(zhì )脆(cuì )。工(gōng )业(yè )上(shàng )用(yòng )做(zuò )研(yán )磨(mó )材(cái )料(liào )。也(yě )叫(jiào )钢(gāng )砂(shā )。
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●金刚砂(简体版)
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