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arXiv physics/0304078physics.chem-phphysics.gen-ph
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铁电陶瓷介电常数对提高polymer复合电解质离子电导率的作用

Role of the dielectric constant of ferroelectric ceramic in enhancing the ionic conductivity of a polymer electrolyte composite

Pramod Kumar Singh, Amreesh Chandra

摘要:

高介电常数铁电陶瓷材料Ba(0.7)Sr(0.3)TiO(3)(Tc~30 C)和Ba(0.88)Sr(0.12)TiO(3)(Tc~90 C)分散在离子导电聚合物电解质(PEO:NH_4 I)中,室温离子电导率提高了两个数量级。当我们接近分散的铁电材料的介电相变时,电导率增强达到“峰值”,其中介电常数从~ 2000变化到4000。这确立了分散质的介电常数在增强聚合物复合材料的离子电导率中的作用。

英文摘要:

The dispersal of high dielectric constant ferroelectric ceramic material Ba(0.7)Sr(0.3)TiO(3) (Tc~30 C) and Ba(0.88)Sr(0.12)TiO(3) (Tc~90 C) in an ion conducting polymer electrolyte (PEO:NH4I) is reported to result in an increase in the room temperature ionic conductivity by two orders of magnitude. The conductivity enhancememt "peaks" as we approach the dielectric phase transition of the dispersed ferroelectric material where the dielectric constant changes from ~ 2000 to 4000. This establishes the role of dielectric constant of the dispersoid in enhancing the ionic conductivity of the polymeric composites.

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