从熔体精炼单晶的一种方法。先将原料粉末熔合预制成烧结棒或材料棒,再使它缓慢通过温度高于该材料熔点的一个区域,使之熔融而再结晶为单晶。区域熔融可把杂质从一个元素或化合物中除掉,达到提纯的目的。也可把需要的元素重新分配于一个物质中,以控制它的成分。区域熔融既可用于提纯高熔点物质,也可用于纯化低熔点化合物。
... 区域湖沼学 regional limnology 区域熔融 regional melting 区域变质带 regional metamorphic belt ...
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为提高防老剂BHT的纯度,采用重结晶和区域熔融法对工业品防老剂BHT进行提纯。
In order to improve the purity of industrial product, Antioxidant BHT was purified by the methods of recrystalize and zone melting.
成矿机理是:区域板块运动使本区在侏罗纪末下地壳形成花岗岩浆熔融层。
The metallogenic mechanism is as follows: in the latest Jurassic, the melting layers of granite magma in the lower crust were formed by the regional plate movement.
主要有溶剂萃取、离子交换、真空熔融、真空蒸馏或升华、电迁移以及区域熔炼等。
There are solvent extraction, ion exchange, vacuum melting, vacuum distillation or sublimation, electro migration and regional melting, etc.
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