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金属学报  2008, Vol. 44 Issue (2): 177-182     
  论文 本期目录 | 过刊浏览 |
CaZr0.9In0.1O3高温质子导体管的制备及性质表征
王 东 史苍际 刘春明 王常珍
(东北大学材料与冶金学院; 沈阳 110004)
Preparation Of High Temperature Proton Conductor Tube CaZr0.9In0.1O3-α And Its Properties
东北大学
引用本文:

王东; 史苍际; 刘春明; 王常珍 . CaZr0.9In0.1O3高温质子导体管的制备及性质表征[J]. 金属学报, 2008, 44(2): 177-182 .

全文: PDF(462 KB)  
摘要: 用直接合成法制备了高温质子导体CaZr0.9In0.1O3-α,粉体平均粒径为1.88μm. 用热铸法制得的质子导体管密度为理论值的97.44%. SEM断口形貌显示晶粒尺寸在1~3μm,结构致密. X射线能谱仪(EDS)和X射线荧光光谱仪(XRF)发现,烧成后材料中的In含量减少. 由热力学分析,这是In2O3在1200℃以上升华、离解造成的. 空气气氛下CaZr0.9In0.1O3-α在931~1300K的电导激活能为1.47eV,电导率为0.91×10-4~1.21×10-2S•cm-1,略低于其在文献报道中氢气气氛下的测定值,但高于CaZr0.97In0.03O3-α在空气气氛下的测定值,符合理论推断.
关键词 CaZrO3掺杂CaZr0.9In0.1O3-α交流阻抗谱    
Abstract:High temperature proton conducotor CaZr0.9In0.1O3-α was prepared by direct synthesis method, and the average grain diameter of the powder was 1.88μm. Hot pressure casting method was used for preparing the tube, whose density was 97.44% relative to theoretical density. SEM fracture analysis showed the grain size was 1~3μm. EDS and XRF showed that the material had In elelment lost after sintered. This is because In2O3 sublimed and decomposed when temperature was higher than 1200℃. The conductivity of CaZr0.9In0.1O3-α was 0.91×10-4~1.21×10-2 S•cm-1 at the temperature range of 931~1300K in air. The value was a little small than the value in H2 and larger than the value of CaZr0.97In0.03O3-α in air in the literature. This was corresponded with theoretical conjecture.
Key wordsCaZrO3 doped    CaZr0.9In0.1O3-α    AC impedance spectroscopy    high temperature proton conductor
收稿日期: 2007-03-28     
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