Characteristic of Sapphire by Filling Treatment
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摘要: 以一组处理和未处理蓝宝石样品为研究对象，采用电子探针、红外光谱仪、激光诱导离解光谱仪、偏光显微镜等仪器进行测试分析，对比处理和未处理蓝宝石样品的成分、结构及谱学特征差异。红外光谱测试显示，未处理蓝宝石样品存在3 311 cm-1处的吸收峰，处理蓝宝石样品此峰缺失，表明处理蓝宝石样品经过氧化热处理。电子探针和激光诱导等离子体离解光谱测试结果表明，处理蓝宝石样品中增加了Ti、Fe、Co，使蓝宝石呈深蓝色。充填物对蓝宝石的裂隙起到了修复、填补和愈合的作用。Abstract: Several untreated and filled sapphire samples were collected. With the help of electron probe micro-analyzer, infrared spectrometer, laser-induced plasma breakdown spectroscopy, polarizing microscope and other gemmological characteristic tests, the sapphire samples were analyzed in the aspects of chemical compositions, structures and spectral characteristics. The results of infrared spectra showed that the absorption peak at 3 311 cm-1 only appeared in untreated sapphire samples, and it lacked in the spectra of treated sapphire samples which revealed the process of oxidation heat treatment. The results of EPMA and LIBS showed that the increase contents of Ti, Fe, Co in the treated sapphire samples made the gem turn to deep blue, and the fillings played an important role in repairing, filling and healing the fractures of sapphires.
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Keywords:
- filling treatment /
- sapphire /
- identification /
- coloration mechanism
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