【摘 要】
：
利用锂钙硼玻璃在磷酸盐溶液中的原位转化反应制备表面多孔的中空羟基磷灰石(HAP)微球.通过扫描电镜(SEM)、电子能谱(SEM-EDs)、X射线衍射(XRD)仪、和红外光谱(FTIR)仪分析微
论文部分内容阅读
利用锂钙硼玻璃在磷酸盐溶液中的原位转化反应制备表面多孔的中空羟基磷灰石(HAP)微球.通过扫描电镜(SEM)、电子能谱(SEM-EDs)、X射线衍射(XRD)仪、和红外光谱(FTIR)仪分析微球的形貌和物相,研究与探讨中空HAP微球的形成与转化机制.结果表明:所制备的微球具有良好的中空结构;中空微球物相为包含B型碳酸根的缺钙羟基磷灰石,具有仿生性.600℃热处理后,微球球壳完全由包含碳酸根的缺钙羟基磷灰石晶体组成,并显示出一定的机械强度.在磷酸盐溶液中,锂钙硼玻璃表面原位生成Ca-P-OH水化物,并在玻璃表而原米Ca2+的位置沉积下来,形成微球壳,而由Li+和B3+占据的位置,因其溶出形成孔隙.这样的结构将有利于制备表面多孔的中空羟基磷灰石多孔贮库型药物释放系统的载体.
其他文献
In order to predict the local scour hole and its evaluation around a cylindrical bridge pier,the computational fluid dynamics (CFD) and theories of sediment mov
Rare earth elements (REEs) and major elements of 25 cobalt-rich crusts obtained from different depths of Mid-Pacific M seamount were analyzed using inductively
Mechanical properties and texture evolutions of the as-rolled AZ31 Mg sheets were investigated. The results show that the grains of the sheets are significantly
Traffic flow prediction is an important component for real-time traffic-adaptive signal control in urban arterial networks.By exploring available detector and s
A new type of Ni-P alloy with rod-shape was prepared by electroless deposition method based on the shape of Nocadia, a kind of bacteria. The material was charac
Porous carbon/carbon preforms were infiltrated with melted silicon to form C/C-SiC composites. Three-layer Si-Mo coating prepared by slurry painting and SiC/Si-
The underwater tapping machine is composed of a center bit,a tapping cutter,a sesl box,a main drive box,aboring bar assembly,a envelop,a gear case,a counter and
Hybrid model testing technique is widely used in verification of a deepwater floating structure and its mooring system,but the design of the truncated mooring s
污染因子在土壤中迁移机理在室内多采用土柱试验开展研究，但对于低渗透性土壤（
博士学位论文摘要：拉萨至日喀则(拉日)铁路线是青藏铁路的首条延伸线，平均线路高程3800 m，共设29座隧道，其中长度在2 km以上的隧道有10座。由于青藏铁路机车仍旧采用内燃牵引，青藏