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| 物理法改色前后优质淡水珍珠的超微结构特征研究 | |
| 引用本文： | 马红艳,韦起桂,木士春,吴敏,陆东农.物理法改色前后优质淡水珍珠的超微结构特征研究[J].矿物学报,2012,32(1):139-145. |
| 作者姓名： | 马红艳 韦起桂 木士春 吴敏 陆东农 |
| 作者单位： | 1. 广西大学材料科学与工程学院教育部有色金属及材料加工新技术重点实验室,广西南宁,530004 2. 武汉理工大学材料复合新技术国家重点实验室,湖北武汉,430070 3. 广西产品质量监督检验院首饰检测室,广西南宁,530022 |
| 摘 要： | 利用原子力显微镜（AFM）、场发射高分辨率扫描电子显微镜（FESEM）和场发射高分辨率透射电子显微镜（HRTEM）对物理法改色前后的优质淡水珍珠表面进行了细致的观察。通过对比分析珍珠在微米级至纳米级的范围内微结构及超微结构特征的变化,证明珍珠质层是天然的纳米材料;改色前后珍珠的红外光谱分析及XRD分析对物理法改色珍珠机理是由于微量MnCO3在γ射线辐照下氧化成Mn2O3或MnO2所致的说法给予否定;由红外光谱测试结果可知物理法改色珍珠呈色机理与珍珠中有机物的辐照化学变化有关,并且物理法改色珍珠伴色的呈色机理与珍珠的文石纳米粒径效应亦无明显的相关性。 |
| 关 键 词： | 辐照珍珠 超微结构 FESEM HRTEM AFM |
The Ultrastructure Characterization of High-Quality Freshwater Cultured Pearls Modified by Color Using Physical Method |
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| MA Hong-yan,WEI Qigui,MU Shichun,WU Min,LU Dong-nong.The Ultrastructure Characterization of High-Quality Freshwater Cultured Pearls Modified by Color Using Physical Method[J].Acta Mineralogica Sinica,2012,32(1):139-145. | |
| Authors: | MA Hong-yan WEI Qigui MU Shichun WU Min LU Dong-nong |
| Institution: | 1.Key laboratory of nonferrous metals and new material processing technology,Ministry of Education.College of Materials Science and Engineering,Guangxi University,Nanning 530004,China;2.State Key Lab of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China;3.Guangxi Zhuang Autonomous Region Institute of Supervision & Testing on Product Quality,Nanning 530022,China) |
| Abstract: | We investigate morphology and microstructure of color modified high-quality fresh water cultured pearls by using physical method with atomic force microscopy(AFM),field emission scanning electron microscopy(FESEM) and high resolution transmission electron microscopy(HRTEM),respectively.The results indicate that nacre in pearls is a kind of natural nano material.In addition,the results of FTIR and XRD analyses are a considerable challenge to the mechanism of pearl color modification with physical method.The mechanism presumes that the color change in such pearls is caused by oxidation of trace MnCO3 to Mn2O3 or MnO2 under the γ-ray irradiation.In fact,in this work,a color-forming mechanism via physical method is involved with the irradiation-induced chemical changes of organic matter in pearls.Moreover,there is no obvious correlation between the color-forming mechanism and the effect of aragonite nanometer particle size of pearls. |
| Keywords: | irradiated pearl ultrastructure FESEM HRTEM AFM |
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