| Ce（Ⅲ） Salt Induced Changes of Superficial Microstructure in Freshwater Pearls |
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| 引用本文： | 施维林 金叶飞 马锡英. Ce（Ⅲ） Salt Induced Changes of Superficial Microstructure in Freshwater Pearls[J]. 中国稀土学报(英文版), 2007, 25(5): 637-642. DOI: 10.1016/S1002-0721(07)60577-8 |
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| 作者姓名： | 施维林 金叶飞 马锡英 |
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| 作者单位： | School of Life Sciences, Shaoxing University, Shaoxing 312000, China |
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| 基金项目： | Project supported by the Chinese Ministry of Education （205065） |
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| 摘 要： | The transition of the superficial microstmcture of freshwater pearls induced by Ce was investigated by means of scanning electron microscopy. The pearls were cultured in freshwater containing 0 （control group ）, 0.5, 1, and 1.5 mg·L^-1 of a Ce additive. X-ray photoelectron spectroscopy （XPS） measurement showed that the concentration of Ce absorbed in the superficial microstmcture of pearls was positively correlated to the additive Ce. At the same time, the surface microstmcture of pearls changed greatly with Ce concentration, the shape of the blocks changed from spindly to perfect regular hexagonal sheets and finally to round discs. The glossiness of the pearls changed correspondingly with the microstmcture, pearls possessing the regular hexagonal blocks having the highest glossiness. Therefore, the REE Ce exerted a significant influence on the microstructure and glossiness of freshwater pearls. An appropriate quantity of Ce may improve the glossiness of pearls.
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| 关 键 词： | 微观结构 稀土元素 化学结构 玻璃 霰石 |
| 文章编号： | 1002-0721（2007）05-0637-06 |
| 收稿时间： | 2006-04-21 |
| 修稿时间： | 2006-04-21 |
Ce(III) Salt Induced Changes of Superficial Microstructure in Freshwater Pearls |
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| Shi , Jin Yefei,Ma Xiying,. Ce(III) Salt Induced Changes of Superficial Microstructure in Freshwater Pearls[J]. Journal of Rare Earths, 2007, 25(5): 637-642. DOI: 10.1016/S1002-0721(07)60577-8 |
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| Authors: | Shi Jin Yefei Ma Xiying |
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| Affiliation: | School of Life Sciences, Shaoxing University, Shaoxing 312000, China |
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| Abstract: | The transition of the superficial microstructure of freshwater pearls induced by Ce was investigated by means of scanning electron microscopy. The pearls were cultured in freshwater containing 0 (control group), 0.5, 1, and 1.5 mg · L−1 of a Ce additive. X-ray photoelectron spectroscopy (XPS) measurement showed that the concentration of Ce absorbed in the superficial microstructure of pearls was positively correlated to the additive Ce. At the same time, the surface microstructure of pearls changed greatly with Ce concentration, the shape of the blocks changed from spindly to perfect regular hexagonal sheets and finally to round discs. The glossiness of the pearls changed correspondingly with the microstructure, pearls possessing the regular hexagonal blocks having the highest glossiness. Therefore, the REE Ce exerted a significant influence on the microstructure and glossiness of freshwater pearls. An appropriate quantity of Ce may improve the glossiness of pearls. |
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| Keywords: | pearls microstructure aragonite blocks glossiness rare earth elements |
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