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\u78b3\u5316\u7845\u5177\u6709\u51fa\u8272\u7684\u70ed\u81a8\u80c0\u7279\u6027\uff0c\u70ed\u81a8\u80c0\u7cfb\u6570\u6781\u4f4e\u3002\u5b83\u7684\u5f3a\u5ea6\u4f7f\u5176\u80fd\u591f\u627f\u53d7\u9ad8\u8fbe 1600 \u6444\u6c0f\u5ea6\u7684\u9ad8\u6e29\uff0c\u800c\u4e0d\u4f1a\u51fa\u73b0\u660e\u663e\u7684\u5b8c\u6574\u6027\u9000\u5316\u6216\u5b8c\u6574\u6027\u635f\u5931\uff0c\u5728\u7a7a\u6c14\u3001\u6c34\u548c\u8bb8\u591a\u6eb6\u5242\u4e2d\u8fd8\u5177\u6709\u51fa\u8272\u7684\u8010\u8150\u8680\u6027\u548c\u6297\u6c27\u5316\u6027\u3002<\/p>","protected":false},"excerpt":{"rendered":"

Silicon carbide (also referred to as silicon carbonitride or SiC) is a green to bluish black crystalline compound composed of silicon and carbon found naturally as moissanite gem but since 1891 has also been produced synthetically for use as an abrasive in grinding wheels and cutting tools. Quartz is an extremely hard material with a …<\/p>\n

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