制备工艺对(ZrO_2)_(0.90)(Y_2O_3)_(0.04)(CaO)_(0.06)电解质材料电性能的影响  

Effects of preparing technologies on electrical conductivity of (ZrO_2)_(0.90)(Y_2O_3)_(0.04)(CaO)_(0.06) solid electrolyte

作　　者：李英[1] 谢裕生[1] 龚江宏[2] 唐子龙[2] 张中太[2] 

机构地区：[1]中国科学院化工冶金研究所,北京100080 [2]清华大学材料科学与工程系,北京100084

出　　处：《电源技术》2001年第5期330-332,336,共4页Chinese Journal of Power Sources

摘　　要：目前ZrO2 基三元系材料的研究是固体电解质材料领域的一个热点。在关于ZrO2 Y2 O3 CaO系统电解质材料电性能研究的前期工作的基础上 ,探讨了不同的制备工艺对 (ZrO2 ) 0 .90 (Y2 O3) 0 .0 4 (CaO) 0 .0 6材料的电导率的影响问题 ,发现 :对于常规烧结的试样 ,其电导率随相对密度的提高而增大 ;与常规烧结相比 ,微波烧结能使材料具有更均匀的微观结构 ,更小的晶粒平均尺寸。较小的晶粒尺寸导致的较为显著的晶界效应是微波烧结试样的电导率有所降低的主要原因。由于微波烧结可以改善材料的力学性能 ,因此认为微波烧结是制备ZrO2 Y2 O3The study of ZrO 2 based ternary system is a current focus on solid electrolyte materials. The effects of various preparing technologies on the conductivity of (ZrO 2) 0.90 (Y 2O 3) 0.04 (CaO) 0.06 materials are discussed on the basis of the previous effort on the electrical performance of ZrO 2 Y 2O 3 CaO solid electrolyte materials. The experimental results show that the ionic conductivity of the normally sintered sample is improved with the increase of the relative density of the sample. The microwave sintered materials have more homogeneous micro structure and smaller average grain size than the normally sintered materials. The significant grain boundary effect resulted from the small grain size is the main reason for the conductivity decrease of microwave sintered samples. The microwave sintering is an effective method for preparing ZrO 2 Y 2O 3 CaO solid electrolyte materials because it can improve the mechanical performances of materials.

关 键 词：燃料电池 电解质材料 电性能 制备工艺 (ZrO2)0.90-(Y2O3)0.04-(CaO)0.06 

分 类 号：TM911.4[电气工程—电力电子与电力传动]