PREPARATION, CHARACTERIZATION, AND IONIC-CONDUCTIVITY OF NOVEL CRYSTALLINE, MICROPOROUS SILICOGERMANATES, M3HGE7-MSIMO16.XH2O, M = K+, RB+, CS+ 0-LESS-THAN-M-LESS-THAN-3 X = 0-4 .3.

被引：27

作者：

FENG, SH ^{[1
]}

TSAI, MT ^{[1
]}

SZU, SP ^{[1
]}

GREENBLATT, M ^{[1
]}

机构：

[1] RUTGERS STATE UNIV,DEPT CHEM,PISCATAWAY,NJ 08855

来源：

CHEMISTRY OF MATERIALS | 1992年 / 4卷 / 02期

关键词：

D O I：

10.1021/cm00020a042

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Crystalline, microporous silicogermanates, M3HGe7-mSimO16.xH2O, M = K+, Rb+, and Cs+, O < m < 3, x = 0-4, were synthesized from hydrothermal systems and characterized by powder X-ray diffraction, differential thermal and thermogravimetric analysis, Fourier transform infrared, and solid-state Si-29 nuclear magnetic resonance techniques. Ionic conductivity in dehydrated samples was investigated by ac impedance in the temperature range 25-550-degrees-C. The framework substitution of Si for Ge at tetrahedral positions leads to a significant increase of ionic conductivity and decrease of activation energy. The effects of the silicon content and size of ionic radius on the activation energy and ionic conductivity are discussed.

引用

页码：468 / 472

页数：5

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