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本文论述了β-Ca_3(PO_4)_2多孔陶瓷的制备方法及其动物试验结果。通过扫描电镜观察、X射线拍片、电子能谱分析等方法,研究了材料在动物体内的降解过程,并从材料内部结构角度探讨了其生物降解机理。 相似文献
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The photochromic properties of photochromicglasses containing both copper halides and cadmiumhalides depend mainly upon the body glass composi-tion. The composition range of glass matrix can bedescribed by F=[(R_20+MO)-Al_20_3]/B_20_3·In this paper,the basic structure of the glasses is investigatedin terms of IR and Raman spectroscopy in detail.The results demonstrate that the network of bodyglass is constructed by [SiO_4], [BO_3], [BO_4] and[Al0_4], in which [BO_3] and [BO_4] are interconnec-ted into two kinds of borate groups and a kind ofboroxol ring. Finally, the relationships betweenstructure and properties have been discussed on thescale of molecules and molecular groups. 相似文献
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铜镉光致变色玻璃的光变色性能和基础玻璃组成之间有着密切联系。可以用F=[(R_2O+MO)-Al_2O_3]/B_2O_3来表述具有良好光变色性能的玻璃的组成范围。本文用红外光谱、拉曼光谱研究了这类玻璃的基本结构。结果表明,基础玻璃由[SiO_4]、[BO_3]、[BO_4]、[AlO_1]共同构成空间网络,其中[BO_3]、[BO_4]相互连接成两种硼酸盐基团和一种硼氧环。透射电镜照片直接给出了玻璃分相和沉积出的微品粒形貌。结合以上的研究结果和玻璃的光变色性,在分子及分子基团的水平上讨论了结构同性能的关系。 相似文献
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