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| silicium; Si | |||
| 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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silicium : 292 短语, 28 学科 |
| 一般 | 11 |
| 专利 | 2 |
| 信息技术 | 29 |
| 农业 | 1 |
| 冶金 | 31 |
| 化学 | 46 |
| 地球科学 | 13 |
| 技术 | 4 |
| 材料科学 | 4 |
| 核物理 | 8 |
| 核辐射 | 19 |
| 热能 | 1 |
| 煤炭 | 1 |
| 环境 | 4 |
| 生命科学 | 2 |
| 电信 | 1 |
| 电子产品 | 81 |
| 矿业 | 1 |
| 纺织工业 | 2 |
| 能源行业 | 3 |
| 自然科学 | 5 |
| 行业 | 3 |
| 计算 | 8 |
| 财政 | 1 |
| 运输 | 3 |
| 通讯 | 4 |
| 食品工业 | 3 |
| 食品服务和餐饮 | 1 |