以氧化锆和氧化镧为反应原料, 以氯化钾-氯化锂为熔盐介质, 采用熔盐法制备了烧绿石结构锆酸镧(La2Zr2O7)粉体, 研究了反应温度和熔盐含量对该粉体纯度的影响, 并分析了其显微结构。结果表明:La2Zr2O7粉体除了由原料直接反应合成外, 还有部分是由La2O3与熔盐先生成中间产物LaOCl, 该中间产物再与ZrO2反应而生成; La2Zr2O7相的生成量随反应温度的升高而增加, 随熔盐含量的增加先增后减; 当熔盐与反应原料的质量比为3∶1时, 在1 200 ℃下反应3 h后可以合成纯La2Zr2O7相的粉体, 其形貌与原料ZrO2粉体的基本相似, 呈无规则颗粒状, 晶粒大小为80～200 nm。
所属栏目
新材料 新工艺“973”计划前期研究专项(2014CB660802); 国家自然科学基金面上资助项目(51272188, 51472184, 51472185); 湖北省自然科学基金重点资助项目(2013CFA086); 湖北省科技支撑计划对外科技合作项目(2013BHE002)
收稿日期
2015/11/252016/4/26
作者单位
黄仲:武汉科技大学材料与冶金学院, 省部共建耐火材料与冶金国家重点实验室, 武汉 430081
李赛赛:武汉科技大学材料与冶金学院, 省部共建耐火材料与冶金国家重点实验室, 武汉 430081
谭操:武汉科技大学材料与冶金学院, 省部共建耐火材料与冶金国家重点实验室, 武汉 430081
刘江昊:武汉科技大学材料与冶金学院, 省部共建耐火材料与冶金国家重点实验室, 武汉 430081
鲁礼林:武汉科技大学材料与冶金学院, 省部共建耐火材料与冶金国家重点实验室, 武汉 430081
张少伟:武汉科技大学材料与冶金学院, 省部共建耐火材料与冶金国家重点实验室, 武汉 430081
张海军:武汉科技大学材料与冶金学院, 省部共建耐火材料与冶金国家重点实验室, 武汉 430081
备注
黄仲（1990-）, 男, 湖北咸宁人, 硕士研究生。
引用该论文:
HUANG Zhong,LI Sai-sai,TAN Cao,LIU Jiang-hao,LU Li-lin,ZHANG Shao-wei,ZHANG Hai-jun.La2Zr2O7 Powder with Pyrochlore Structure by Molten Salt Synthesis[J].Materials for mechancial engineering,2016,40(6):55～58
黄仲,李赛赛,谭操,刘江昊,鲁礼林,张少伟,张海军.熔盐法合成烧绿石结构La2Zr2O7粉体[J].机械工程材料,2016,40(6):55～58
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