钙钛矿型电解质材料NdGa_(1-x)Mg_xO_(3-δ)的制备与电学性能  

Preparation and electrical properties of perovskite-type electrolytes NdGa_(1-x)Mg_xO_(3-δ)

作　　者：张迎春[1] 贺天民[1] 

机构地区：[1]吉林大学物理学院,吉林长春130021

出　　处：《物理实验》2009年第8期42-46,共5页Physics Experimentation

基　　金：吉林大学本科生研究机会计划资助项目

摘　　要：用甘氨酸-硝酸盐法制备出钙钛矿结构的电解质材料NdGa1-xMgxO3-δ.研究表明,Mg掺杂NdGaO3氧化物在室温下均为立方钙钛矿结构.B位掺杂Mg2+极大地提高了NdGaO3的电导率,比纯NdGaO3的电导率提高了3个数量级.1 400℃下烧结20 h的样品NdGa0.914Mg0.086O2.957呈现出最好的烧结性能,相对密度达到了99.4%,800℃时的电导率达到了2.99×10-2S.cm-1,高于同温度下YSZ电解质的电导率.表明NdGa0.914Mg0.086O2.957氧化物是一种具有潜在应用价值的中温电解质材料.The solid electrolytes NdGa1-xMgxO3-δ（x=0.05, 0.086, 0.10 and 0.15） with perovs- kite-structure are synthesized using glycine-nitrate process. The structures and properties of sintered samples are investigated. The results show that all the NdGa1-xMgrO3-δ samples prepared are cubic perovskite-structure at room temperature, Mg doping for Ga site in NdGaO3 dramatically increases the ionic conductivity of NdGaO3. The electrical conductivity is higher by three orders of magnitude than that of pure NdGaO3. The properties of samples sintered at 1 400℃ for 20 h are at various aspects superior to those sintered at 1 400℃for 10 h. The sample NdGa0.914Mg0.086O2.957 presents the highest density, and the relative density achieves 99. 4%. The electrical conductivity of sample NdGa0.914 Mg0.086 02.957 attains 2.99×10^-2S·cm^-1 at 800 ℃, which is higher than that of YSZ at the same temperature.

关 键 词：掺杂镓酸钕 固体电解质 钙钛矿结构 电导率 

分 类 号：O482.4[理学—固体物理]