| Na4Ca(SO4)3复盐高温合成及温度对晶体形貌的影响 |
| High Temperature Synthesis and Effect of Temperature on Morphology of Na4Ca(SO4)3 Double Salt |
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| 摘要: 用高温合成法制备出硫酸钙复盐Na4Ca(SO4)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CaSO4+Na2SO4→(Na0.8Ca0.1)2SO4→Na4Ca(SO4)3进行。Na4Ca(SO4)3为高温稳定相，其最佳合成温度为800 ℃～1 100 ℃。育晶温度及时间对复盐形貌有明显影响，在1 000 ℃保温2 h后转到945 ℃育晶5 h,晶体生长较好。 |
| 关键词: Na4Ca(SO4)3 复盐 合成 形貌 |
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| Abstract: 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 ℃～1 100 ℃. Effect of incubation temperature and time on morphology of double salt was discussed. The crystal grows better when it is synthesized at 1 000 ℃ for 2 h and then incubated at 945 ℃ for 5 h. |
| Keywords: Na4Ca(SO4)3 double salt synthesis morphology |
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| 王锦华,杨新亚,王守兴,陈文.Na4Ca(SO4)3复盐高温合成及温度对晶体形貌的影响[J].无机化学学报,2007,23(5):791-794. |
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