无机材料学报

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氧化锆粉体的Rietveld方法X射线衍射定量相分析

王佩玲; 贾迎新; 王大志+; 罗毅+   

  1. 中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室; 上海 200050; +中国科技大学材料科学与工程系; 合肥 230026
  • 收稿日期:1996-07-11 修回日期:1996-08-08 出版日期:1997-08-20 网络出版日期:1997-08-20

Quantitative Analysis of Zirconia Powder by Rietveld Method of X-ray Diffraction

WANG Peiling; JIA YingXin; WANG Dazhi+; LUO Yi+   

  1. State Key Lab on High Performance Ceramics and Saperfine Microstructure; Shanghai Institute of Ceramics; Chinese Academy of Sciences Shanghai 200050 China; +Dept. of Materials Science and Engineering; University of Science and Technology of China Hefei 230026 China
  • Received:1996-07-11 Revised:1996-08-08 Published:1997-08-20 Online:1997-08-20

摘要: 对以不同温度和时间进行热处理的氧化锆粉体,利用X射线步长衍射数据及Rietveld修正方法进行了相含量的定量分析.结果表明,以500℃热处理2h的氧化锆粉体为立方和四方二相混合物(重量比为48:52).在700℃热处理2h,立方相已消失,部分四方相也相变成单斜相,四方相与单斜相的重量比为35:65.800℃及900℃分别热处理8h及2h都得到接近纯单斜相的氧化锆粉体,四方相的含量分别为5wt%和1wt%.文中也讨论了热处理温度和时间对氧化锆粉体晶粒大小的影响.

关键词: ZrO2, 定量分析, Rietveld方法

Abstract: The quantitative phase analysis of zirconia powder treated with various temperatures and times was performed based on X-ray profile diffraction data and
Rietveld method. The results showed that zirconia powder obtained by 500℃ heat treatment for 2h was a cubic and tetragonal mixture with the weight ratio of 48:52,
whereas cubic phase disappeared in zirconia powder after 700℃ treatment for 2h and part of tetragonal phase was transformed into monoclinic phase at the same time with the
weight ratio of tetragonal to monoclinic 35:65. Almost pure monoclinic phase was obtained when zirconia powder heated at 800℃ and 900℃ for 8h and 2h respectively
and the tetragonal contents in these two cases were about 5 wt% and 1 wt% respectively. The effect of temperature and time of heat treatment on the size of grain of zirconia
powder was also discussed.

Key words: ZrO2, quantitative analysis, Rietveld method