摘要
用高温合成法制备出硫酸钙复盐Na_4Ca(SO_4)_3,利用差热分析、X射线衍射、扫描电子显微分析等现代测试仪器研究了该复盐的反应历程。研究结果表明,其反应过程按CaSO_4+Na_2SO_4→(Na_(0.8)Ca_(0.1))_2SO_4→Na_4Ca(SO_4)_3进行。Na_4Ca(SO_4)_3为高温稳定相,其最佳合成温度为800℃￣1100℃。育晶温度及时间对复盐形貌有明显影响,在1000℃保温2h后转到945℃育晶5h,晶体生长较好。
The calcium sulfate double salt Na4Ca（SO4）3 was prepared by high temperature synthesis method. The modern instruments such as XRD, TG-DTA and SEM etc., were used to research the processing steps of the double salt. The experimental results show the reaction steps were described as follows： CaSO4 ＋Na2SO4→ （Na0.8Ca0.1）2SO4→Na4Ca（SO4）3. Na4Ca（SO4）3 is a steady phase at high temperature. Optimal synthesis temperatures range is 800 ℃- 100 ℃. Effect of incubation temperature and time on morphology of double salt was discussed. The crystal grows better when it is synthesized at 1000 ℃ for 2 h and then incubated at 945℃ for 5 h.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2007年第5期791-794,共4页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金资助项目(No.20471046)。
