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论文类型：期刊论文

发表时间：2015-12-01

发表刊物：APPLIED SCIENCES-BASEL

收录刊物：SCIE、Scopus

卷号：5

期号：4

页面范围：989-997

ISSN号：2076-3417

关键字：calcium barium sulphoaluminate; sintering system; Ba2+ replacement rate; Rietveld refinement

摘要：Calcium barium sulphoaluminate (CBSA), derived from calcium sulphoaluminate (CSA), has excellent cementitious properties. In this study, the sintering system of CBSA with a theoretical stoichiometric Ca3BaAl6SO16 was investigated. Rietveld refinement was performed using TOPAS 4.2 software to quantitatively calculate the content of CBSA and the actual ionic site occupancy of Ba2+. The results indicate that the content of Ca4-xBaxAl6SO16 increases with increasing sintering temperature in the 1200-1400 degrees C ranges. When sintered at 1400 degrees C for 180 min, the content of CBSA reaches 88.4%. However, CBSA begins to decompose at 1440 degrees C, after which the content decreases. The replacement rate of Ba2+ was also enlarged by increasing sintering temperature and prolonged sintering time. Sintering at 1400 degrees C for 180 min is considered as the optimum when replacement rate of Ba2+ and the content of CBSA were taken into account. Ca3.2Ba0.8Al6SO16 with a content of 88.4% was synthesized.