文献类型：期刊文献

英文题名：Dissolution-precipitation mechanism of combustion synthesis of calcium aluminate

作者：Yang, Shoulei[1,2];Xiao, Guoqing[1];Ding, Donghai[1];Ren, Yun[1];Lv, Lihua[1];Yang, Pan[1]

第一作者：Yang, Shoulei

通讯作者：Xiao, GQ[1]

机构：[1]Xian Univ Architecture & Technol, Coll Mat & Mineral Resources, Xian 710055, Shaanxi, Peoples R China;[2]Henan Univ Econ & Law, Sch Engn Management & Real Estate, Zhengzhou 450046, Henan, Peoples R China

第一机构：Xian Univ Architecture & Technol, Coll Mat & Mineral Resources, Xian 710055, Shaanxi, Peoples R China

通讯机构：[1]corresponding author), Xian Univ Architecture & Technol, Coll Mat & Mineral Resources, Xian 710055, Shaanxi, Peoples R China.

年份：2017

卷号：43

期号：17

起止页码：15918-15926

外文期刊名：CERAMICS INTERNATIONAL

收录：;EI(收录号：20173604137249);Scopus(收录号：2-s2.0-85028751266);WOS:【SCI-EXPANDED(收录号:WOS:000413175300185)】；

基金：This work was supported by the National Natural Science Foundation of China (Nos. 51272203, 51572212), China Postdoctoral Science Foundation (2016M602940XB), and Open Project from State Key Laboratory of Advanced Refractories (201504) (Sinosteel Luoyang Institute of Refractories).

语种：英文

外文关键词：Calcium aluminate; Combustion synthesis; Mechanism; Combustion front quenching method

摘要：The mechanism of combustion synthesis (CS) for calcium aluminate was analyzed by a combustion front quenching method. The phase compositions of different zones in the quenched sample were examined by X-ray diffraction (XRD). The microstructural evolution during the CS process was explored by field-emission scanning electron microscopy equipped with energy dispersive spectrometer (FESEM-EDS). Moreover, the combustion temperature and wave velocity were measured. The results showed that the combustion reaction started with the decomposition of CaO2 and melting of Al, at the same time, O-2 reacted with Al forming Al2O3, which released a large amount of heat to fuse CaO and Al2O3 forming the liquid. Finally, calcium aluminates with good crystallinity would be gradually precipitated from the CaO-Al2O3 liquid. Furthermore, a model corresponding to the dissolution-precipitation mechanism was proposed.