| 光谱学与光谱分析 |
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| Spectroscopy Characteristics of Various Aluminum Phosphates in Al2O3-P2O5-H2O System and Its High Temperature Products |
| HUANG Zeng-wei1,YUAN Ai-qun1,2*,SHI Zhan-wang1,HUANG Qi-liang1,DENG Guang-hui1,TONG Zhang-fa2 |
1. Department of Chemistry and Ecology Engineering,Guangxi University for Nationalities，Nanning 530006,China
2. School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China |
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Abstract Various aluminum phosphates were prepared with phosphoric acid and aluminum hydroxide under different conditions. IR,XRD,Raman and SEM were used to study the structure difference and their change in heating process and particle morphology of obtained products and aluminum tripolyphosphate. The results show that the spectral characteristic change of phosphate from H2PO-4,PO3-4,H2P3O3-10 and PO-3 can be seen when P/Al molar ratio=3 or the condensation temperature is different. The PO symmetric stretching peaks shift to lower wavenumber and the bands widen along with the extent of polymerization. After aluminum tripolyphosphate is heated,the frequencies of stretching vibrational modes depend on the micro-structure units of phosphate and increase with the extent of polymerization. Both Raman and infrared spectra can characterize the pattern of the hydroxyl stretching vibrations. The laminated thickness of reaction product is increases and laminar boundary is vague until the clinker clew is formed.
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Received: 2006-09-12
Accepted: 2006-12-19
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Corresponding Authors:
YUAN Ai-qun
E-mail: aiqunyuan1999@yahoo.com.cn
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