个人信息Personal Information
教授
博士生导师
硕士生导师
性别:男
毕业院校:武汉理工大学
学位:博士
所在单位:土木工程系
学科:材料学. 结构工程
联系方式:mlchang@dlut.edu.cn
电子邮箱:mlchang@dlut.edu.cn
Crystallographic Analysis of Sr-Bearing Ye'elimite
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论文类型:期刊论文
发表时间:2017-11-01
发表刊物:JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
收录刊物:Scopus、SCIE、EI
卷号:27
期号:6
页面范围:1694-1702
ISSN号:1574-1443
关键字:Sr-bearing ye'elimite; Crystallography; Rietveld quantitative phase analysis; Lattice parameter
摘要:Ye'elimite (C(4)A(3)$) is the main phase in calcium sulfoaluminate (CSA) cement. To improve the performance of CSA cement, substitutions of Ca2+ by Sr2+ cations in C(4)A(3)$ can be done to synthesize Sr-bearing ye'elimite. In this study we performed crystallographic analysis of Sr-bearing ye'elimite (C(4-xx)A(3)$) synthesized with 0.25-3.00 mol Sr2+ ions. The effect of strontic substitutions on the crystal structure of ye'elimite was investigated. Compositions of clinkers and the lattice parameters of Sr-bearing ye'elimite were determined by the Rietveld method. Results showed that strontic substitutions promoted the transformation of the crystal system from orthorhombic to cubic for ye'elimite. Sr-bearing ye'elimite almost purely exists in a cubic structure when amounts of strontic substitutions exceed 1.25 mol. The amount of Sr-bearing ye'elimite in crystalline phases is over 95 wt% while impurities in the clinkers of Sr-bearing ye'elimite contain minor amounts of calcium aluminate phases. Lattice parameters of Sr-bearing ye'elimite exhibit linear growth with strontic substitutions increasing for both cubic and orthorhombic systems. Both calcium and strontium evenly distribute in the particles of Sr-bearing ye'elimite.