中文摘要：

研究了一种硫铝酸锶钙矿物2Ca O·2Sr O·3Al2O3·SO3（C2S2A3$）的形成过程,采用Rietveld定量方法确定了不同温度、不同保温时间下烧成熟料中C2S2A3$矿物的含量,并对C2S2A3$的形成过程进行动力学分析。结果表明：在1 150–1 350℃条件下,熟料中C2S2A3$的含量随着保温时间的延长而增加,在1 350℃保温180 min时C2S2A3$的含量达到97.3%;在1 400℃保温超过30 min时,熟料中C2S2A3$的含量开始减少;在1 450℃熟料中C2S2A3$的含量随保温时间的延长而降低。形成C2S2A3$的固相反应符合三维扩散模型,Jander模型具有最好的拟合效果。C2S2A3$形成过程的活化能为479 k J/mol。烧成温度主要影响C2S2A3$矿物颗粒的细观形貌,但不会影响C2S2A3$矿物的元素分布及组成。

英文摘要：

The formation process of 2Ca O·2Sr O·3Al2O3·SO3, which is a type of Sr-bearing ye＇elimite, was investigated. The content of C2S2A35 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 C2S2A35 increases with increasing the holding time at 1 150-1 350 ℃, and the content of C2S2A3S is 97.3% in clinkers at 1 350 ℃ for 180 min. C2S2A35 starts to decompose at 1 400 ℃ when prolong time exceeds 30 min. The content of C252A35 decreases with increasing the holding time at 1 450 ℃. The solid-phase reaction of C2S2A35 formation fits the three-dimensional diffusion model, and the Jander model gives the optimal fitting results. The activation energy of C2S2A35 is 479 kJ/mol. The sintering temperature affects the mesoscopic morphology of C2S2A35 particles, while does not affect the elementary distribution and component.