溶胶凝胶法制备Ca_3Co_4O_9及其性能分析  

Preparation of Ca_3Co_4O_9 thermoelectric materials by sol-gel method and its performance analysis

作　　者：李佳书[1] 胡志强[1] 秦艺颖 李亚玮[1] 

机构地区：[1]大连工业大学纺织与材料工程学院,辽宁大连116034

出　　处：《大连工业大学学报》2017年第3期206-209,共4页Journal of Dalian Polytechnic University

摘　　要：采用溶胶-凝胶法制备出了不同温度煅烧的Ca_3Co_4O_9热电材料样品,通过XRD、SEM、EDS、TG-DTA、IR以及气孔率的测量对样品进行了表征,结果表明,800℃煅烧为最佳温度,经800℃煅烧900℃烧结的样品的XRD图谱与标准JCPDS图谱保持一致,样品结构致密,气孔小,吸水性小,使得Ca_3Co_4O_9热电材料样品具有较低电阻率,较高塞贝克系数,在1 050K时功率因子达到180μW/(m·K^2)。The thermoelectric material Ca3Co409 were calcined at different temperature by sol-gel method, and characterized by XRD, SEM, EDS, IR, and porosity measurement. The results showed that the optimum calcination temperature was 800 ℃. The XRD pattern was consistent with the standard JCPDS pattern calcined at 800℃ and sintered at 900 ℃, and no impurities were found. The structure was tight and had smaller pore, less water absorption, lower resistivity and higher Seebeck coefficient. The power factor could reach to 180μW/mK^2 at 1 050 K.

关 键 词：CA3CO4O9 热电材料 溶胶-凝胶法 电阻率 塞贝克系数 

分 类 号：TQ174.75[化学工程—陶瓷工业]