文献类型：期刊文献

中文题名：Y_xTi_2O_n(1.7≤x≤2.1)系固态电解质的共沉淀法合成及电导率研究

英文题名：Study on Synthesis and Electronic Conductivities of Y_xTi_2O_n(1.7≤x≤2.1) System as Solid State Electrolytes by co-Precipitation

作者：薛明俊[1];李光远[1];徐云龙[1];郑金标[1]

机构：[1]华东理工大学材料科学与工程学院,上海200237

年份：2007

卷号：25

期号：S1

起止页码：24

中文期刊名：中国稀土学报

外文期刊名：Journal of the Chinese Society of Rare Earths

收录：CSTPCD;;Scopus;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：中温燃料电池;固态电解质;YxTi2On系烧绿石;共沉淀法;电导率

外文关键词：SOFC; intermediate temperature; solid state electrolyte; pyrochlore inYxTi2On system; co-precipitation; electronic conductivities;

摘要：以TiCl3、YCl3溶液和氧化钛、氧化钇为原料,通过共沉淀法和固相法制备了YxTi2On(1.7≤x≤2.1,x=1.7,1.8,1.9,2.0,2.1)系烧绿石型固态电解质样品。粉体经700℃处理后在透射电镜下可见其粒径小于100 nm的晶粒。用共沉淀法制得的样品通过1500℃/5 h烧结后的相对密度近94%,且比用固相法经1550℃/5 h烧结所获相同组成样品的相对密度明显要高。X衍射表明样品A(x=1.7)的主晶相为烧绿石和二氧化钛,而样品D(x=2.0)和E(x=2.1)都为烧绿石。从扫描电镜照片可见,样品E的晶界随着烧结温度的提高变得更清晰,晶体生长也更充分。随着Y2O3含量的增加,YxTi2On(1.7≤x≤2.1)系电解质的电导率随之增加。用共沉淀法所得样品的电导率明显高于相应固相法所得样品。随烧结温度和测量温度的提高,样品E的电导率增加。
The synthesis and electronic conductivities of YxTi2On(1.7≤x≤2.1) pyrochlore as solid state electrolytes were prepared by co-precipitation and mixing of solid oxides in form of TiCl3 and YCl3 solution and Y2O3 and TiO2 as raw material were prepared,respectively.From TEM image,the articles calcined at 700 ℃ with less than 100 nm can be seen.The relative densities of the samples prepared by co-precipitation sintered at 1500 ℃ for 5 h could reach 94% approximately,which were much higher than those of the corre...