无机材料学报2012，Vol.27Issue(5)：524-528,5.DOI:10.3724/SP.J.1077.2012.00524
淡水三角帆蚌贝壳珍珠质的同步辐射XRD研究
Synchrotron XRD Study on the Nacre of Freshwater Bivalve H.cumingii Lea
摘要
Abstract
Synchrotron XRD was used to study internal stress of nacre and microstructure of individual nacre tablet in the shell of freshwater bivalve H. cumingii Lea. The diffraction patterns show some biopolymers (intra-crystalline organic matrix) are occluded inside nacre tablets during biomineralization, causing that nacre powder exhibits tensile-like internal stress which is strongly anisotropic along different vectors of the reciprocal lattice. The characteristic of internal stress suggests that the intra-crystalline organic matrix is most probably arranged in the specific form. And line profile analysis which is conducted with the synchrotron XRD patterns of heated and unheated nacre powder samples, further confirms that the intra-crystalline organic matrix is adsorbed on (002) atomic planes of nacre tablets. The findings will facilitate the study on the formation mechanism and the strengthening and toughening mechanism of the nacre and provide theoretical basis for designing new organic-inorganic composite with high performances and cultivating pearl.关键词
珍珠质/同步辐射XRD/微结构/内应力Key words
nacre/ synchrotron XRD/ microstructure/ internal stress分类
通用工业技术引用本文复制引用
鄢晓晖,王胜男,杜博,王小祥..淡水三角帆蚌贝壳珍珠质的同步辐射XRD研究[J].无机材料学报,2012,27(5):524-528,5.基金项目
国家自然科学基金(50571088) （50571088）
