The laws of silicon ingot formation by combustion reaction |
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Authors: | H. H. Nersisyan H. I. Won C. W. Won |
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Affiliation: | (1) Rapidly Solidified Materials Research Center (RASOM), Chungnam National University, 220, Gung-dong, Yuseong-gu, 305-764 Daejeon, Korea |
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Abstract: | The formation of a phase pure silicon ingot from SiO2+Al+KClO3 and Na2SiO3+Al+KClO3 systems was investigated thermodynamically and experimentally under combustion mode, known also as self-propagating high-temperature synthesis (SHS). The regularities of combustion and phase formation versus KClO3 concentration by a thermocouple technique were obtained. The morphology, chemical and phase composition of the silicon ingot were analyzed by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), and ICP-analysis. The method reported here proved effective in producing silicon ingots with a purity of 98%. |
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Keywords: | silicon ingot combustion process thermodynamics silicon dioxide |
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