球磨方式对8YSZ离子电导率的影响  

Effect of Milling Processes on 8YSZ Ionic Conductivity

作　　者：王洋[1] 陈涵[1] 郭露村[1] 殷波 WANG Yang;CHEN Han;GUO Lucun;YIN Bo(College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, Jiangsu, China;YiXing Morgan Thermal Ceramics Co., Ltd., Yixing 214200, Jiangsu, China)

机构地区：[1]南京工业大学材料与科学学院,江苏南京210009 [2]宜兴摩根热陶瓷有限公司,江苏宜兴214200

出　　处：《陶瓷学报》2016年第3期241-244,共4页Journal of Ceramics

基　　金：江苏高校优势学科建设工程资助项目(PAPD)资助

摘　　要：实验采用机械球磨制备8YSZ(8mol%氧化钇稳定氧化锆)粉末,球磨过程中使用了有3YSZ陶瓷内衬及无内衬的尼龙球磨罐(记为PMZ和PMN),分别采用X-射线衍射研究了不同球磨过程下得到的8YSZ粉体,离心沉降法测量了得到的不同8YSZ粉体的粒径,阿基米德悬浮法以及电化学阻抗谱研究了不同球磨过程得到的8YSZ的气孔率以及离子电导率。结果表明:8YSZ表观粒径在PMZ和PMN过程中分别达到饱和值0.42μm和0.89μm;8YSZ的离子电导率随着8YSZ粉体的表观粒径(1.43-0.42μm)减小而提高;为了弥补球磨过程中由于3YSZ混入导致的氧化钇摩尔比偏离,PMZ球磨48 h的8YSZ在增补0.44 mol%的氧化钇后离子电导率提高了10%,达到0.0283 S·cm^(-1)。Mechanical milling was conducted on 8YSZ (8mol% yttria stabilized zirconia) mixtures using planetary ball mill equipped with3YSZ (3mol% yttria stabilized zirconia) ceramic liner and nylon vials (separately denoted as PMZ and PMN). The particle size analysisresults showed that the saturation values for the final apparent particle sizes of 8YSZ mixtures were 0.42 μm and 0.89 μm, by means of PMZand PMN, respectively. The ionic conductivities of 8YSZ via different milling processes were measured by electrochemical impedancespectroscopy (EIS) within the temperature range of 500-800 ℃ and found to increase with the decreasing of the apparent particle sizes (0.42to 1.43 μm). Furthermore, due to the inherent contamination of 3YSZ (3mol% yttria stabilized zirconia) powders introduced by the abrasionof 3YSZ balls against the chamber, the supplementing yttria (0.44mol%) led to an increase of ionic conductivity by 10% (0.0283 S·cm-1) at800 ℃.

关 键 词：机械球磨 8mol%氧化钇稳定氧化锆 离子电导率 

分 类 号：TQ174.75[化学工程—陶瓷工业]