Sr(Ce_(0.5-x)Zr_(0.5-x))Dy_(2x)O_(3-x)质子导体材料的制备及电性能研究  

Study on preparation and electrical property of Sr(Ce_(0.5-x) Zr_(0.5-x) )Dy_(2x) O_(3-x) proton conductor materials

作　　者：李娟[1] 崔一强[2] 郭瑞松[1] 余芬[1] 王淼[1] 

机构地区：[1]天津大学先进陶瓷与加工技术教育部重点实验室,天津300072 [2]河北化工医药职业技术学院,河北石家庄050026

出　　处：《电源技术》2007年第6期459-461,共3页Chinese Journal of Power Sources

摘　　要：采用固相法合成了具有质子导电性能的Sr(Ce0.5-xZr0.5-x)Dy2xO3-x(2x=0.1、0.15、0.2、0.25),采用差热-热重分析(DTA-TG)研究粉体的预合成制度,通过X射线衍射光谱法(XRD)对合成产物的结构进行了分析,采用排水法测定了试样的烧结密度,利用四探针法测定了材料在湿氢气气氛400～1000℃下的电导率,研究了温度及掺杂量对材料电性能的影响。研究表明,Dy掺杂锆铈酸锶具有钙钛矿型结构,400～1000℃时材料的电导率随温度的升高逐渐升高,并且当掺杂量2x≤0.2时,电导率随掺杂量的增加而增大,当掺杂量2x>0.2时,电导率反而下降。当2x=0.2,测试温度为1000℃时,材料的电导率达到最大,即1.6×10-2S/cm。Perovskite solid solutions with formula Sr（Ce0.5-x Zr0.5-x ）Dy2 xO3-x（ 2 x= 0.1,0.15,0.2,0.25 ）and with proton conduction were prepared by solid state reaction. The calcination process of powders was investigated by DTA-TG analysis and the crystalline structure was examined by XRD. The density of samples was measured according to the Archimedes principle. The high temperature conductivities were measured by a DC 4-probe method in the temperature range, from 400 to 1 000 ℃, in wet hydrogen and the effects of temperature and dopant content on conductivity were investigated. The results indicate that Sr（Ce0.5-x Zr0.5-x ）Dy2 xO3-x have perovskite structure. The conductivity increases with the elevation of temperature from 400 to 1 000 ℃ and increases with the increase of dopant content when it was ≤0.2, but decreases with the increase of dopant content when it was〉0.2. The highest conductivity （1.6 × 10^-2S/cm） was observed for 2 x= 0.2 at 1 000℃.

关 键 词：电解质 质子导体 钙钛矿 电导率 

分 类 号：TM911.4[电气工程—电力电子与电力传动]