低热固相合成磷酸镧及其结晶度

对合成功能材料磷酸镧的新方法进行了研究，以聚乙二醇-400 （PEG-400）为表面活性剂，LaNO₃•6H₂O和(NH₄)₃PO₄•3H₂O为原料，用低热固相反应法成功合成得到磷酸镧。用产物XRD图谱数据计算得到的结晶度作为试验的考察指标，试验中应用了均匀设计试验法及数据挖掘技术，在数据挖掘成果的指导下进行了试验。试验结果表明，用最优工艺条件合成得到的产物为23nm的LaPO₄∙0.5H₂O，结晶度为97.8%与数据挖掘得到的最佳结果相吻合。TG/DTA分析结果表明LaPO₄∙0.5H₂O在300℃下加热脱水可以转变成为LaPO₄。

Synthesis and crystallization of lanthanum phosphate via solid state reaction

The low heat solid state reaction method for the synthesis of functional material lanthanum phosphate was studied, and the target product was obtained successfully with La(NO₃)₃·6H₂O and (NH₄)₃PO₄·3H₂O as raw materials and PEG-400 as surfactant via the low heat solid state reaction.Crystallization calculated with XRD data of the product was used as the testing index, and application of uniform experimental design as well as data mining technology were used in the test.The synthesis tests were performed under the guidance of the results of data mining technology.The test results indicated that the product synthesized with the optimal technical condition was LaPO₄·0.5H₂O with the size of 23 nm and crystallization of 97.8%.TG/DTA analysis results indicated that LaPO₄ could be obtained from dehydration of LaPO₄·0.5H₂O at 300℃.