Structural and thermal properties of alkaline earth metal phosphates
作者:R.G. Sarawadekar、S.B. Kulkarni
DOI:10.1016/0040-6031(83)80114-2
日期:1983.9
Abstract A series of alkaline earth metal orthophosphates M 3 (PO 4 ) 2 · X H 2 O (M = Mg, Ca, Sr and Ba) is studied by DTA, TG and DTG techniques followed by X-ray diffraction and IR spectroscopy. The activation energies for the dehydration of the various phosphates are evaluated, and the structural changes occurring in the phosphates on calcination at different temperatures are discussed in the light
摘要 采用DTA、TG、DTG、X射线衍射和红外光谱技术研究了一系列碱土金属正磷酸盐M 3 (PO 4 ) 2 ·XH 2 O (M = Mg、Ca、Sr和Ba)。评估了各种磷酸盐脱水的活化能,并根据 X 射线衍射和红外数据讨论了磷酸盐在不同温度下煅烧时发生的结构变化。
Phase development in the hardening process of two calcium phosphate bone cements: an energy dispersive X-ray diffraction study
dispersive X-raydiffraction technique to study the kinetics of phase development during the setting and hardening reactions in two calciumphosphate bone cements. The cements under study are based on either tricalcium phosphate or tetracalcium phosphate initial solid phase, and a magnesium carbonate-phosphoric acid liquid phase as the hardening liquid. The application of the energy dispersive X-ray diffraction
这项工作旨在应用能量色散 X 射线衍射技术来研究两种磷酸钙骨水泥凝固和硬化反应过程中的相发展动力学。所研究的水泥基于磷酸三钙或磷酸四钙的初始固相,以及作为硬化液的碳酸镁-磷酸液相。能量色散 X 射线衍射方法的应用允许从凝固和硬化过程的 1 分钟开始就地收集水泥浆体的衍射图。两种水泥中唯一的结晶相是类磷灰石相,主要结晶过程在凝固反应的几秒钟内进行。