Structural Characteristics of Turquoise Filled with Aluminum Phosphate Adhesive
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摘要: 疏松绿松石经磷酸铝结合剂浸胶充填处理后，宝石学参数、力学和工艺性质均得到明显改善，与天然绿松石相仿.为查明这类改性绿松石的结构和探讨磷酸铝无机结合剂对绿松石的改善机理，采用环境扫描显微镜(ESEM)、差热分析(TG-DSC)、红外吸收光谱(IR)和X射线粉晶衍射分析方法(XRD)，对此类浸胶充填处理后的绿松石结构、物相及热性质等特征进行了研究.结果显示充填入的磷酸铝结合剂呈凝胶状分布在绿松石微孔隙间，处理后绿松石的分子结构和矿物组构与处理前一致，但产生了一定程度的非晶质化，与磷酸铝结合剂的填充作用有关，即磷酸铝结合剂在固化过程中生成氢，结合形成无机网络高分子结构；处理后绿松石的热反应温度较处理前普遍有所降低，主要是由于添加入的磷酸铝结合剂具有较低的吸热反应温度所致.Abstract: The quality grade, gemology characteristics, cutting and grinding processing of the loosen turquoises filled with aluminum phosphate adhesive are improved distinctly, and consequently they are similar with the natural turquoises. They can not be identified easily by gemmology testing methods. In order to verify the structure of this kind of modified turquoises and discuss the mechanism of the turquoises improved by the aluminium phosphate inorganic adhesive, the environmental scanning electron microscope (ESEM), thermogravimetric and thermal analysis (TG-DSC), infrared spectrum (IR) and X-ray powder diffraction (XRD) have been used to study the structural characteristics, phase, and thermal property of the turquoises filled with aluminum phosphate adhesive. It is indicated that the micro-pores of the turquoises after treatment are completely filled by aluminum phosphate adhesive as gelatinous, and the mineral composition and molecular structure of turquoises show no noticeable changes, but is amorphous in a degree. The amorphous structure is relevant with the filling of aluminum phosphate that is the inorganic polymer network structure forms when the aluminum phosphate adhesive is dehydrated. Moreover, the endothermic and exothermic reaction temperatures of the turquoises after treatment fall in certain degree than the natural ones caused by the addition of aluminum phosphate.
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Key words:
- turquoise /
- aluminum phosphate adhesive /
- structural analysis /
- X ray diffraction analysis /
- gems
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图 2 处理前后绿松石的红外吸收光谱对比
Fig. 2. The IR spectra of the turquoises before and after treatment
图 5 充填处理前后绿松石的差热失重分析曲线
Fig. 5. Different thermal analysis of the turquoises before and after treatment
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Chen, Q.L., Qi, L.J., Yuan, X.Q., et al., 2008. Thermal property of the apatite pseudomorphic turquoise. Earth Science—Journal of China University of Geosciences, 33(3): 416-422 (in Chinese with English abstract). http://www.en.cnki.com.cn/Article_en/CJFDTOTAL-DQKX200803019.htm Chen, Q.L., Qi, L.J., Zhang, Y., 2006. IR absorption spectrum representation of turquoise, treated turquoise and imitation. Journal of Gems and Gemmology, 8(1): 9-12 (in Chinese with English abstract). http://www.cqvip.com/Main/Detail.aspx?id=21408892 Frost, R.L., Reddy, B.J., Martens, W.N., et al., 2006a. The molecular structure of the phosphate mineral turquoise—a Raman spectroscopic study. Journal of Molecular Structure, 788(1-3): 224-331. doi: 10.1016/j.molstruc.2005.12.003 Frost, R.L., Reddy, B.J., Weier, M.L., et al., 2006b. Ultraviolet-visible, near infrared and mid infrared reflectance spectroscopy of turquoise. Journal of Near Infrared Spectroscopy, 14(4): 241-250. doi: 10.1255/jnirs.641 Jalili, M.M., Moradian, S., Hosseinpour, D., 2009. The use of inorganic conversion coatings to enhance the corrosion resistance of reinforcement and the bond strength at the rebar/concrete. Construction and Building Materials, 23(1): 233-238. doi: 10.1016/j.conbuildmat.2007.12.011 Jiang, Z.C., Chen, D.M., Wang, F.Y., et al., 1983. Thermal properties of turquoise and its intergrowine minerals in a certain district of China. Acta Mineralogica Sinica, 3: 198-206 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-KWXB198303006.htm Klein, C., Werner, G., 1994. Turquoise gem material, natural and various modifications and substitutes. International Mineralogical Association (16th general meeting), 16: 207. Koivula, J.I., Kammerling, R.C., 1999. The identification of Zachery-treated turquoise. Gems and Gemology, 35(1): 4-16. doi: 10.5741/GEMS.35.1.4 Krotki, S., 2002. An examination of crystallized turquoise from Lynch Station, Virginia. Rocks and Minerals, 77(5): 346-347. doi: 10.1080/00357529.2002.9925660 Li, S.J., Liang, J.F., Wang, L.D., et al., 1997. Research trends of phosphoric acid adhesives. Shenyang Chemical Industry, 2: 7-10 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-SYHH702.002.htm Li, X.A., Wang, F.Y., Zhang, H.F., 1984. Structural characteristics of water in turquois. Acta Mineralogica Sinica, 1: 78-83 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-KWXB198401015.htm Li, Y.H., Zhang, A.Y., Yang, Z., 1994. Study on turquoise filling with glue. Jewellery Science and Technology, 6(1): 28-29 (in Chinese). Qi, L.J., Yan, W.X., Yang, M.X., 1998. Turquoise from Hubei Province, China. The Journal of Gemmology, 26(1): 1-12. doi: 10.15506/JoG.1998.26.1.1 Sofi, M., Van Deventer, J.S.J., Mendis, P.A., et al., 2007. Bond performance of reinforcing bars in inorganic polymer concrete (IPC). Journal of Materials Science, 42(9): 3107-3116. doi: 10.1007/s10853-006-0534-5 Yang, H.S., Herve, A., Jon, K., 2005. Phosphate polymerizableadhesion promoters. JCT Coatings Tech., 2(13): 44-52. http://www.freepatentsonline.com/6930136.html Zhou, J.H., Yuan, X.Q., 2008. Study on modification of loosen turquoise by inorganics filling and cementation. Journal of Gems and Gemmology, 10(3): 31-35 (in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-BSHB200803010.htm 陈全莉, 亓利剑, 袁心强, 等, 2008. 具磷灰石假象绿松石的热性能. 地球科学——中国地质大学学报, 33(3): 416-422. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX200803019.htm 陈全莉, 亓利剑, 张琰, 2006. 绿松石及其处理品与仿制品的红外吸收光谱表征. 宝石和宝石学杂志, 8(1): 9-12. doi: 10.3969/j.issn.1008-214X.2006.01.003 姜泽春, 陈大梅, 王辅亚, 等, 1983. 湖北、陕西一带绿松石的热性能及其共生矿物. 矿物学报, 3: 198-206. doi: 10.3321/j.issn:1000-4734.1983.03.006 李师军, 梁金芳, 王丽达, 等, 1997. 磷酸系无机粘合剂的研究动态. 沈阳化工, 2: 7-10. https://www.cnki.com.cn/Article/CJFDTOTAL-SYHH702.002.htm 李新安, 王辅亚, 张慧芬, 1984. 绿松石中水的结构特征. 矿物学报, 1: 78-83. doi: 10.3321/j.issn:1000-4734.1984.01.014 李友华, 章安玉, 杨照, 1994. 绿松石加胶改色的研究. 珠宝科技, 6(1): 28-29. https://www.cnki.com.cn/Article/CJFDTOTAL-ZBKJ401.017.htm 周金花, 袁心强, 2008. 疏松绿松石的无机物充填胶结改性研究. 宝石和宝石学杂志, 10(3): 31-35. doi: 10.3969/j.issn.1008-214X.2008.03.009 -
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