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OALib Journal期刊
ISSN: 2333-9721
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醇的性质对溶剂热法制备cahpo4形貌的影响
DOI: 10.3969/j.issn.1671-7627.2014.03.011, PP. 57-61
Keywords: 溶剂热法,cahpo4,形貌控制,醇
Abstract:
采用溶剂热法在醇-水二元溶剂中合成cahpo4。利用扫描电子显微镜(sem)、x线衍射仪(xrd)等分析技术表征cahpo4的形貌和晶相。结果表明,与纯水溶剂相比,醇-水二元溶剂对产物的晶相和形貌有较大的影响:晶相由磷酸八钙(ocp)变为水合磷酸氢钙(dcpd)和无水磷酸氢钙(dcpa)的混合物;形貌由多孔微球状变为非球状结构。以醇-水二元溶剂合成cahpo4时,随着醇分子链的碳链长度的增加,cahpo4的形貌由长饼状变为六边形和固体小颗粒的结构,最终变为块状和刺状结构。随着醇羟基个数的增加有利于cahpo4的形貌从块体向刺状球转变。这些形貌的差异主要是由于dcpd的(020)晶面和(121)晶面以及dcpa的(112)晶面和(220)晶面的生长速率不一致所导致的。
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