新型片状结构的碱式碳酸镁合成PMNT的研究  

Research of Synthesis for PMNT Powder with Novel Plate-shaped 4MgCO_3·Mg （OH）_2·5H_2O

作　　者：宫兆泉[1] 马丽[1] 刘永勤[1] 金国玺[1] 孙大志[1] 

机构地区：[1]上海师范大学化学系,上海200235

出　　处：《纳米科技》2010年第5期52-54,共3页

基　　金：Acknowledgements The authors would like to thank the National Science Foundation of China （60807036）, the Leading Foundation of Shanghai （08JC1417200）, and the Laboratory of Rare Earths Functional Materials of Shanghai （07dz22303） for supporting the research.

摘　　要：采用微米级的碱式碳酸镁作为原料,用一步烧结的方法制备铁电材料0.67Pb （Mg1/3Nb2/3）O3-0.33PbTiO3（PMNT）。经过1200℃烧结后, XRD测试没有发现烧绿石相。与传统的使用氧化镁为原料的两步烧结法相比,此方法方便。同时,系统地研究了此方法可以避免烧绿石相的原因。Ferroelectrics 0.67Pb （ Mg1/3Nb2/3） O3 -0.33PbTiO3 （ PMNT） were prepared by one -step sintering method with micron-sized 4MgCO3·Mg （OH）2·5H2O as precursor. Pyrochlore phase was not observed after sintering at 1200℃ by X-ray diffraction （XRD）. Compared with two-stage columbite method which is using MgO as starting material, one-stage method is more convenient. The reason why this one -stage method could avoid pyrochlore phases was also systematically investigated and discussed.

关 键 词：碱式碳酸镁 一步烧结 烧绿石相 

分 类 号：O61[理学—无机化学]