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湿化学法合成铌镁酸铅陶瓷微观结构

Microstructure of Lead Magnesium Niobate Ceramics Synthesised by Wet Chemical Method

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【作者】 张文林杜国维肖治纲马肇曾林实

【Author】 Zhang Wenlin; Du Guowei; Xiap Zhigang; Ma Zhaozeng; Lin Shi (Applied Science School, UST Beijing, BeiJing 100083, China)

【机构】 北京科技大学应用科学学院!北京100083

【摘要】 用湿化学法合成钥镁酸铅陶瓷.用X射线(XRD、扫描电镜(SEW和透射电镜(TEM)技术,研究陶瓷的微观结构.结果表明:湿化学法可合成纯钙钛矿相的钥镁酸铅陶瓷;陶瓷在850~920℃烧结,晶粒大小为150~200nm,细小焦绿石相出现并分布在晶界上;过量PbO相的形成有利于陶瓷的烧结.

【Abstract】 Lead magnesium niobate ceramics have been synthesised by wet chemicalmethod and their microstructures are studied by means of X-ray diffraction(XRD,scanning electron microscopy(SEM) and transndssion electron microscopy(TEM). Theexperimental results show that pure perovskite PMN ceramics is obtained during calcining at 800℃ for 1h. The grain size of PMN ceramic varies from 150nm to 200nm after sintering at 85O~ 920 ℃. The pyrochlore phase is situated at the grain boundaries of the perovskite phase if it occurs. Excess PbO phase existing in the ceramic is in favour of sintering of the cerarnic powder.

  • 【文献出处】 北京科技大学学报 ,JOURNAL OF UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING , 编辑部邮箱 ,1997年04期
  • 【分类号】TB321
  • 【被引频次】4
  • 【下载频次】107
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