层状α-氢型磷酸氢锆混合二氧化硅的交流电导  

ALTERNATING CURRENT CONDUCTIVITY OF α-ZIRCONIUM PHOSPHATE MIXED WITH FUMED SILICA IN HYDROGEN FORM

作　　者：郝金库[1] 赵维君[2] 方延铨[2] 张书芨 

机构地区：[1]天津师范大学化学系 [2]南开大学化学系,天津300071

出　　处：《物理化学学报》1992年第4期567-570,共4页Acta Physico-Chimica Sinica

摘　　要：1 引言无定形和多晶粉末层状α-水合磷酸氢锆是一种固体质子电解质.多晶粉末层状α-水合磷酸氢锆的电导率随结晶度的提高而明显降低,但是其电导表观活化能相同而和结晶度无关.电导主要是由质子沿着微晶的水合表面迁移所致.因此,增大水合表面有可能提高多晶粉末层状α-磷酸氢锆的电导率.α-layered zirconium phosphate was obtained by direct precipitation method. Composites formed by α-zirconium phosphate and fumed silica were prepared by dispersing predetermined molar ratios of polycrystalline α-zirconium phosphate and fumed silicain water. Admittance measurement of the samples was made in a sealed cell connectedto a Hewlett Packard 4192A impedance analyzer in the frequency range from 5Hz to1MHz. All of the samples with varing molar ratios of α-zirconium phosphate to silicaat 60%, 40% relative humidities have the same approximate Arrhenius activationenergies, around 48kJ·mol^(-1), that means the charge transport mechanism was main-tained after mixing fumed silica into α-layered zirconium phosphate.

关 键 词：磷酸氢锆 电导 二氧化硅 

分 类 号：O482.4[理学—固体物理]