超能陆战队故事简介:Which one of the following materials is closest to diamond in hardness?
来源:百度文库 编辑:查人人中国名人网 时间:2024/04/30 05:08:20
a. aluminum oxide
b.carbon dioxide
c.cubic boron nitride
d.silicon dioxide
e.tungsten carbide
b.carbon dioxide
c.cubic boron nitride
d.silicon dioxide
e.tungsten carbide
a. aluminum oxide
刚玉的摩氏硬度为9,是迄今为止自然界中所发现的、硬度仅次于钻石的第二号高硬度物质。
刚玉的主要成分为a-氧化铝
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Which one of the following materials is closest to diamond in hardness?