【作者】 张丽鹏； 于先进； 董云会； 李德刚； 李忠芳；

【Author】 Zhang Lipeng Yu Xianjin~* Dong Yunhui Li Degang Li Zhongfang (Shandong University of Technology,Zibo 255091,China)

【机构】 山东理工大学化学工程学院；

【摘要】 采用溶胶-凝胶法成功制备了 Ca₃Co₄O₉粉体。通过对样品的显微结构与物相组成等进行研究分析,优化了制备工艺。结果表明: 恰当的添加剂、750℃、预烧时间2h 是合适的合成工艺条件,由溶胶-凝胶法制得的 Ca₃Co₄O₉粉为10-30 nm 的片状晶体。采用粉末冶金法900℃下烧结5h 制得 Ca₃Co₄O₉材料,材料具有高致密度和低气孔率。更多还原

【Abstract】 In this work Ca₃Co₄O₉ powders were prepared by sol-gel method,and the appropriate preparation technologies were researched.The microstructure and crystal composition of the samples were characterized by using XRD and SEM. The result showed that it is appropriate to use additives and to sinter for 2 h at 750℃,and Ca3Co409 powder contained 10-30 nm gains with layered structure.The Ca₃Co₄O₉ thermoelectric material was prepared by sintering for 5 h at 900℃, and the material had high density and low pore rate.更多还原