导电ZrO_2复合纳米材料的制备和表征

Preparation and Characterization of Conductive ZrO_2 with Combined Nano-Structure

用溶胶 -凝胶方法 ,结合后焙烧处理 ,得到系列ZrO2 纳米材料及其与碳膜组成的复合材料 .XRD ,Raman ,SEM及导电性能测试表明 :复合ZrO2 纳米材料有较小的粒径 (6 .85nm) ,晶型为立方相 ,有较均匀的二次粒子分布 ,其中碳以碳膜形式存在 ,复合材料有好的导电性能 .将碳膜在 82 3K氧化后 ,立方相转化为四方体相 ,粒径增加 。

Series of ZrO2 nanomaterials and their combined materials with carbon membrane were obtained by Sol-Gel method followed by post-calcination. The test results of XRD, Raman and SEM show that the nanomaterials has as small size as 6.85 nm with cube phase, well-organized secondary distribution particles, and the combined materials exhibit good conductivity with carbon existing in membrane form. After carbon membrane was oxidated at 823 K, the cubic ZrO2 was transformed into insulated tetragonal ZrO2 with crystal size increasing.