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| silicon | |||
| silicon A brittle metalloid element that exists in two allotropic forms; occurs principally in sand, quartz, granite, feldspar, and clay. It is usually a grey crystalline solid but is also found as a brown amorphous powder. It is used in transistors, rectifiers, solar cells, and alloys. Its compounds are widely used in glass manufacture, the building industry, and in the form of silicones | |||
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silicis : 13 短语, 5 学科 |
| 信息技术 | 6 |
| 地球科学 | 1 |
| 市政规划 | 1 |
| 环境 | 1 |
| 食品工业 | 4 |