磷酸钾镁水泥水化产物六水磷酸钾镁(K-Struvite)定量分析

Quantitative Analysis of Hydration Products K-struvite in Magnesium Potassium Phosphate Cement

中文关键词: 磷酸钾镁水泥 K-Struvite 定量分析 全谱拟合

英文关键词: magnesium potassium phosphate cement, K-struvite, quantitative analysis, Rietveld

中文摘要:

      磷酸钾镁水泥的各项性能与其中水化产物六水磷酸钾镁(K-Struvite)的含量息息相关。使用基于X射线衍射的绝热法、Rietveld法分析了不同配比磷酸钾镁水泥中K-Struvite和MgO的相对含量,并提出了将相对含量转化为绝对含量的公式。之后使用热重分析法确定了K-Struvite的脱水温度和绝对含量,并和绝热法、Rietveld法所得结果进行了比较,发现三种方法所得结果较为一致。绝热法和Rietveld法在分析K-Struvite相对含量时简便快速,但换算为绝对含量时比热重分析法需要的相关信息要多,可操作性弱于热重分析法。

英文摘要:

      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.