摘要
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。
Calcium hydrogen phosphates（ CaHPO4） were synthesized by solvothermal treatment. The morphology and the phase were characterized by scanning electron microscopy（ SEM） and X-ray diffraction（ XRD）. Results showed that the mixture solvent of alcohol and water had a great effect on the morphology and the phase of calcium phosphates compared with water as the solvent： the phase transformed from octacalcium phosphate（ OCP） phase to the mixture phases of dicalsium phosphate dehydrate（ DCPD） and dicalcuim phosphate anhydrons（ DCPA）; the morphology changed from porous spheres to aspherical structure. In addition,the morphology of calcium hydrogen phosphates transformed from long cake-like structure to the mixture of hexagonal structure and particle,finally to the mixture of bulk and burr with the increase of the carbon chain in alcohol. Increasing the number of —OH in alcohol contributed to the morphology of spheres of burr. Different morphologies were caused by the different growth rates of the crystal faces of DCPD（ 020）,DCPD（ 121）,DCPA（ 112） and DCPA（ 220）.
出处
《南京工业大学学报（自然科学版）》
CAS
北大核心
2014年第3期57-61,共5页
Journal of Nanjing Tech University(Natural Science Edition)
基金
江苏省自然科学基金(BK2011076)
关键词
溶剂热法
CaHPO4
形貌控制
醇
solvothermal treatment
calcium hydrogen phosphates（CaHPO4）
morphology control
alcohol
作者简介
姚兴星（1987-），男，江苏高邮人，硕士生，主要研究方向为生物医用材料；李延报（联系人），副教授，E-mail：ybli@njtech．edu．cn．
