Abstract: The performance of magnesium potassium phosphate cement is closely related to the content of MgKPO4·6H2O (K-struvite). In this study, the relative content of K-struvite and MgO in magnesium phosphate cement was analyzed by the adiabatic method and Rietveld method based on X-ray diffraction, and the formula for converting relative content into absolute content was proposed. The dehydration temperature and absolute content of K-struvite were determined by thermogravimetric method, and the results were compared with the results obtained by adiabatic method and Rietveld method. The results obtained from the three methods were consistent. Adiabatic method and Rietveld method are simple and fast in the analysis of the relative content of K-struvite, but the required relative information is much more than that of thermogravimetric method when converting to absolute content, therefore the thermogravimetric method is more operational.
1 You C, Qian J, Qin J, et al. Effect of early hydration temperature on hydration product and strength development of magnesium phosphate cement (MPC)[J]. Cem Concr Res, 2015,78:179. 2 Ma H, Liu J, Li Z, et al. Effects of water content, magnesia-to-phosphate molar ratio and age on pore structure, strength and permeability of magnesium potassium phosphate cement paste[J]. Mater Des, 2014,64(9):497. 3 Mestres G, Ginebra M P. Novel magnesium phosphate cements with high early strength and antibacterial properties[J]. Acta Biomater, 2011,7(4):1853. 4 Xia J H, Yuan D W, Wang L J. Research on hydration mechanism of magnesia phosphate cement[J]. J Wuhan University of Technology, 2009(9):25(in Chinese). 夏锦红, 袁大伟, 王立久. 磷酸镁水泥水化机理研究[J]. 武汉理工大学学报, 2009(9):25. 5 Chang Y, Shi C J, Yang N, et al. Effect of fineness of magnesium oxide on properties of magnesium potassium phosphate cement[J]. J Chin Ceram Soc, 2013,41(4):492(in Chinese). 常远, 史才军, 杨楠,等. 不同细度MgO对磷酸钾镁水泥性能的影响[J]. 硅酸盐学报, 2013,41(4):492. 6 Lai Z Y, Zou Q L, Lu Z Y, et al. Quantitative analysis of hydration products in magnesium phosphate cement with Rietveld whole pattern fitting[J]. Acta Metrologica Sin, 2014,35(4):398(in Chinese). 赖振宇, 邹秋林, 卢忠远,等. Rietveld 全谱拟合方法对磷酸镁水泥水化产物的定量分析研究[J]. 计量学报, 2014,35(4):398. 7 黄继武. 多晶材料X射线衍射[M].北京:冶金工业出版社, 2012. 8 Fang J Z, Xu C F. Study on three kinds of XRD quantitative analysis methods[J]. Coal Conversion, 2010,33(2):88(in Chinese). 房俊卓, 徐崇福. 三种X射线物相定量分析方法对比研究[J]. 煤炭转化, 2010,33(2):88. 9 Young R A. The Rietveld method[J]. Crystal Res Technol, 1993,210(8):710. 10Li Y, Shi T, Chen B, et al. Performance of magnesium phosphate cement at elevated temperatures[J]. Constr Build Mater, 2015,91:126. 11Lai Z Y, Qian J S, Lu Z Y, et al. Effects of different temperature treatment to properties of magnesium phosphate cement[J]. J Funct Mater, 2012,43(15):2065(in Chinese). 赖振宇, 钱觉时, 卢忠远,等. 不同温度处理对磷酸镁水泥性能的影响[J]. 功能材料, 2012,43(15):2065. 12Yang J M, Shao Y X, Liu H. Influence of ratio of acid to base on the properties of magnesium and porassium phosphate cemen[J]. J Building Mater, 2013,16(6):923(in Chinese). 杨建明, 邵云霞, 刘海. 酸碱组分比例对磷酸钾镁水泥性能的影响[J]. 建筑材料学报, 2013,16(6):923. 13Zhang S, Shi H S, Huang S W, et al. Dehydration characteristics of struvite-K pertaining to magnesium potassium phosphate cement system in non-isothermal condition[J]. J Thermal Analysis Calorimetry, 2013,111(1):35.
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2017, Vol. 31 
