Synthesis of cubic Cs2FeSi5O12 powder in Ar atmosphere and its thermal expansion property

被引：0
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作者：
Yanase, Ikuo [1 ,3 ]
Kobayashi, Hidehiko [1 ]
Mitamura, Takashi [2 ]
机构：
[1] Department of Applied Chemistry, Faculty of Engineering, Saitama University, 255, Shimoohkubo, Urawa-shi, Saitama 338-8570, Japan
[2] Graduate School, Saitama Institute of Technology, 1690, Fusaiji, Okabe-machi, Ohsato-gun, Saitama 369-0293, Japan
[3] Natl. Inst. for Res. in Inorg. Mat., 1-1, Namiki, Tsukuba-shi, Ibaraki 305-0044, Japan
来源：
Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan | 2000年 / 108卷 / 1259期
关键词：
Amorphous materials - Argon - Cesium compounds - High temperature properties - Iron oxides - Silica - Synthesis (chemical) - Thermal expansion - X ray diffraction analysis;
D O I：
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摘要：
Cubic Cs2FeSi5O12 powder with the space group Ia-3d was synthesized by heating the powder mixture of Cs2CO3&middot2H2O, Fe3O4 and amorphous SiO2 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 Cs2FeSi5O12 powder was investigated in the temperature range from 298 to 1273 K using high-temperature X-ray diffraction. The thermal expansion rate of cubic Cs2FeSi5O12 was lower than that of cubic CsFeSi2O6. Consequently, increasing the molar ratio of Si/Fe was effective for decreasing the thermal expansion rate of Cs-Fe-leucite compounds. Cubic Cs2FeSi5O12 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.
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页码：677 / 680
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