| 磷酸钾镁水泥耐高温性能研究 |
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| 引用本文： | 姜自超,齐召庆,李帅,张时豪,丁建华,戴丰乐.磷酸钾镁水泥耐高温性能研究[J].当代化工,2016(11). |
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| 作者姓名： | 姜自超 齐召庆 李帅 张时豪 丁建华 戴丰乐 |
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| 作者单位： | 1. 后勤工程学院化学与材料工程系,重庆,401311;2. 重庆电子工程职业学院建筑与材料学院,重庆,401311 |
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| 基金项目： | 重庆市自然科学基金项目(cstc2012jjB50009)。 |
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| 摘 要： | 研究了不同温度处理对磷酸钾镁水泥性能的影响,并利用X射线衍射仪、综合热分析仪、扫描电子显微镜对机理进行了分析。试验结果表明,在100℃以上的高温环境下,磷酸钾镁水泥质量会减少、强度会发生降低;物相分析的结果显示,高温处理后磷酸钾镁水泥的主要水化产物Mg KPO4·6H2O衍射峰会降低;热重分析的结果显示,磷酸钾镁水泥试样在108℃左右有一个明显的吸热谷并伴随着明显的质量损失;微观形貌分析的结果显示,经高温处理后磷酸钾镁水泥的水化产物减少,过烧氧化镁会大量裸露。磷酸钾镁水泥经高温处理后性能下降是水化产物在高温下分解导致的。
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| 关 键 词： | 磷酸钾镁水泥 高温 性能 机理 |
Study on High Temperature Resistance of Magnesium Potassium Phosphate Cement |
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| Abstract: | Effect of high temperature treatment on the properties of magnesium potassium phosphate cement (MKPC)was studied, and the mechanism was analyzed by XRD,TG-DSC and SEM. The experimental results show that the quality and strength of MKPC decrease in high temperature environment. The results of phase analysis show that the diffraction peak of MgKPO4·6H2O(the main hydration products of MKPC) decreases after high temperature treatment. According to the results of the TG-DSC, MKPC has a clear endothermic valley at about 108℃ and accompanied by obvious mass loss. The results of micro morphology analysis show that the hydration products of MKPC reduce after high temperature treatment, and magnesia particles are exposed. The performance degradation of MKPC after high temperature treatment is the result of MgKPO4·6H2O decomposing at high temperature. |
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| Keywords: | magnesium potassium phosphate cement high temperature performance mechanism |
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