高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (5): 785.

• 论文 • 上一篇    下一篇

Rietveld全谱拟合表征掺杂ZnO陶瓷

倪玉华, 马礼敦, 沈孝良, 施国顺   

  1. 复旦大学分析测试中心, 上海 200433
  • 收稿日期:1999-04-06 出版日期:2000-05-24 发布日期:2000-05-24
  • 通讯作者: 马礼敦(1935年出生),男,教授,博士生导师,从事催化剂、非晶态及纳米材料等的结构化学研究.
  • 基金资助:

    国家自然科学基金(批准号:29573098)

Doped ZnO Ceramics Characterized by Rietveld Whole Pattern Fitting

NI Yu-Hua, MA Li-Dun, SHEN Xiao-Liang, SHI Guo-Shun   

  1. Center for Analysis and Measurement, Fudan University, Shanghai 200433, China
  • Received:1999-04-06 Online:2000-05-24 Published:2000-05-24

摘要: 通过Rietveld全谱拟合对掺杂多物相ZnO陶瓷的物相定量组成,所含尖晶石相的化学配比、晶粒大小和残余应力等结构参数同时进行了表征,既快又准。研究结果表明,掺杂ZnO陶瓷以保持原晶格常数和没有其它元素掺杂的较大颗粒的ZnO相为主体,高分散的Bi2O3相与尖晶石相晶粒分散于ZnO晶粒间。尖晶石相的元素组成随原料的掺杂组分配比不同而不同,利用全谱拟合精修确定了它们的元素组成。

关键词: 掺杂ZnO陶瓷, Rietveld全谱拟合方法, 结构表征

Abstract: Doped ZnOceramics have complicated XRDdiffraction patterns. It is difficult to carry out qualitative, quantitative phase analysis and to determine the crystalline size and micro strain of them with traditional methods. Here we used Rietveld whole pattern fitting method to analyze them. The composition of spinel varied when the proportion of adulterant changes and it was detemined by whole pattern fitting. All the results were obtained simultaneously in fitting. Therefore the time for data processing was shorter than that the traditional methods need. And the results were more accurate than that obtained by traditional method. It was found that ceramics consist mainly of bigger ZnOgrains (the lattice parameters of them are close to those in pure ZnOso they are not doped with other metals), and intergranular high dispersive Bi2O3 and spinel grains.

Key words: Doped ZnO ceramics, Rietveld whole pattern fitting, Structure characterization

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