珪素に關する研究(第1報) : 純珪素製造の基礎的研究

概要

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Many researches for the production of silicon, which have been studied by many investigators, may be summarized in three methods as follows : Method 1. Reduction of silicon oxide with metals or carbon. Method 2. Thermal decomposition of silicon halide or hydride. Method 3. Reduction of silicon halide with metals or alkalis. For the purpose of the production of pure silicon, the authors adopted the method 3. Zinc, which has been known to have small solubility in silicon at comparatively high temperature and produce no silicide, was used for the reduction of silicon tetrachloride. The authors considered next three reactions as main ones at limited temperature range. Reaction 1. [chemical formula] Reaction 2. [chemical formula] Reaction 3. [chemical formula] The experiments for the reduction of silicon tetrachloride with zinc were carried out with the equipments matched for the above reactions. The vertical vessel containing silica crucible to hold liquid zinc was used for Reaction 1 and 2. The equipment of jet method was adopted to prepare silicon by Reaction 3. The details are described in this paper. We found that Reaction 3 proceeded remarkably. The produced silicon is acicular crystal and after vacuum melting it has about 99.99% purity spectroscopically.
東北大学の論文
1952-09-10