硅酸盐学报2017，Vol.45Issue(8)：1128-1135,8.DOI:10.14062/j.issn.0454-5648.2017.08.11
2CaO·2SrO·3Al2O3·SO3的形成动力学
Formation Kinetics of 2CaO·2SrO·3Al2O3·SO3
摘要
Abstract
The formation process of 2CaO·2SrO·3Al2O3·SO3,which is a type of Sr-bearing ye'elimite,was investigated.The contentof C2(S)A3＄ in clinkers sintered in different temperatures and prolong time was determined via the Rietveld quantitative phase analysis.The formation process follows the kinetic models.The results show that the content of C2(S)2A3＄ increases with increasing the holding time at 1 150-1 350 ℃,and the content of C2(S)2A3$ is 97.3％ in clinkers at 1 350 ℃ for 180 min.C2(S)A3＄ starts to decompose at 1 400 ℃C when prolong time exceeds 30 min.The content of C2(S)2A3＄ decreases with increasing the holding time at 1 450 ℃.The solid-phase reaction of C2(S)2A3＄ formation fits the three-dimensional diffusion model,and the Jander model gives the optimal fitting results.The activation energy of C2(S)2A3＄ is 479 kJ/mol.The sintering temperature affects the mesoscopic morphology of C2(S)2A3＄ particles,while does not affect the elementary distribution and component.关键词
硫铝酸锶钙/动力学/Rietveld定量方法/形成过程Key words
strontium calcium sulfoaluminate/kinetics/Rietveld quantitative phase analysis/formation process分类
化学化工引用本文复制引用
赵九野,常钧..2CaO·2SrO·3Al2O3·SO3的形成动力学[J].硅酸盐学报,2017,45(8):1128-1135,8.基金项目
国家自然科学基金(51472041)资助项目. （51472041）
