著者

奥谷 猛 中田 善徳 日野 雅夫

出版者

公益社団法人日本セラミックス協会

雑誌

日本セラミックス協会学術論文誌 : Nippon Seramikkusu Kyokai gakujutsu ronbunshi (ISSN:18821022)

巻号頁・発行日

vol.99, no.1152, pp.709-711, 1991-08-01

被引用文献数

1 1

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The chlorination of a mixture of rice hull ashes and carbon containing alkaline and alkaline earth salts was investigated by FT-IR-PAS. It was thought that the relative ratio of totally symmetric SiO_4 stretching vibration (v_1) to antisymmetric SiO_4 degenerate stretching vibration (v_3) in infrared frequencies for SiO_2 whose constituent oxygen atoms occupy the corners of a tetra-hedron shows structural changes of SiO_2 network. The results of v_1/v_3 of SiO_2 before and after chlorination showed that the values of v_1/v_3 increased and the chlorination was accelerated because K^+ increased. The v_1/v_3 of SiO_2 by addition of Na^+, Mg^<2+> and Ca^<2+> was smaller than that of K^+ and these additives did not accelerate the chlorination. KCl, NaCl, MgCl_2 and CaCl_2 which formed during the chlorination melted at 900℃.