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化学气相迁移
释义
化学气相迁移
Encyclopedia
理学
化学气相迁移
释
chemical vapor transport
化学气相迁移
一个共同特征的异相反应,凝聚态物质(通常是固体粉体)(A)本身挥发压力不足,但在气相反应剂(B)的存在下,B与A封闭在同一管子中,加热时B与A反应,生成气相的AB,当AB迁移至不同温度或压力的管子的另一处时,AB分解,A再以晶体的形式沉积,达到物质的提纯或改变物理状态(或二者兼有)的反应。
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