Ar雰囲気中での立方晶Cs_2FeSi_5O_<12>粉末の合成とその熱膨張特性

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rights: 社団法人日本セラミックス協会rights: 本文データは学協会の許諾に基づきCiNiiから複製したものであるrelation: isVersionOf: http://ci.nii.ac.jp/naid/110002289877/Cubic Cs_2FeSi_5O_<12> powder with the space group Iα-3d was synthesized by heating the powder mixture of Cs_2CO_3・2H_2O, Fe_3O_4 and amorphous SiO_2 with the molar ratio of Cs/Fe=2 and Si/Fe=5 at 1273 K for 20 h under Ar gas flow. The thermal expansion property of cubic Cs_2FeSi_5O_<12> powder was investigated in the temperature range from 298 to 1273 K using high-temperature X-ray diffraction. The thermal expansion rate of cubic Cs_2FeSi_5O_<12> was lower than that of cubic CsFeSi_2O_6. Consequently, increasing the molar ratio of Si/Fe was effective for decreasing the thermal expansion rate of Cs-Fe-leucite compounds. Cubic Cs_2FeSi_5O_<12> showed a lower thermal expansion with the mean linear thermal expansion coefficient of 1.75×10^<-6>K^<-1> in the range from 573 to 1273 K.
社団法人日本セラミックス協会の論文
2000-07-01