廃棄物からの安価な炭化ケイ素の合成

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  • Formation of Inexpensive Silicon Carbide from Waste Materials

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Several industrial and domestic waste products were used as raw materials for the production of inexpensive SiC. The waste products used as a carbon source were rice hulls, wheat hulls, weekly magazines, newspaper, copy paper, and paper milk cartons. As the Si source, silicon powder produced during the silicon wafer fabrication process was used. The carbon sources were carbonized by firing in a reducing atmosphere, and carbonized rice hulls were found to have the highest concentration of Si. The carbonized wastes were mixed with silicon powder and fired at high temperatures, successfully producing SiC. The products of rice hulls and silicon after firing at very high temperatures were almost identical to natural graphite and silicon systems, respectively.

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