摘要
用XRD国，Raman，FTIR研究了三种磷酸锌水合物的常温光谱，分析了图谱特征随结晶水的变化；用TG-DTA研究了四水磷酸锌的热稳定性，并确定了磷酸锌水合物的生成温度。结果显示结晶水含量的不同引起了磷酸锌水合物的X衍射2θ特征值和特征峰的变化；FTIR图谱反映了在1640cm^-1处和3400～3550cm^-1范围对应的H—O—H，O—H键的伸缩振动形式和强度的区别；Raman光谱反映P—O键振动模式在400～700cm^-1区间的差异同时揭示了O—H键振动峰宽的差异。四水磷酸锌在90℃时开始失水，145℃完全脱去两分子结晶水生成二水物，195℃时变为—水物，273℃时脱去剩余的结晶水成为无水磷酸锌。
X-ray, FTIR, and Raman spectra were used to measure the spectral properties of three kinds of zinc phosphate hydrate. Spectral changes with crystalline water were analyzed. The thermal stability of zinc phosphate tetrahydrate was studied by TG-DTA to identify the existent temperature of zinc phosphate hydrate. The results show that the differences in crystalline water among these hydrates results in the variation in both 2θ characteristic values and peaks. The FTIR spectra reflect H--O--H strength information （1 600 cm^-1 ） and O--H bond stretching vibrations （3 400-3 500 cm^-1 ）. Raman spectra show the difference in P--O bond stretching mode at 400-700 cm^-1 and the shape of O--H stretching peak. According to the mass-loss curves, the onset temperature of zinc phosphate tetrahydrate was 95℃. Heating to 145℃ was accompanied by the removal of 2H2O and transform into Zn3 （PO4）2·2H20, indicating that Zn3 （PO4）2·2H2O was established at this temperature. Zn3 （PO4）2·H2O can be obtained by heating to 195℃. The third stage of dehydration gave an anhydrous Zn3 （PO4）： phase.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2006年第8期1564-1567,共4页
Spectroscopy and Spectral Analysis
基金
广西科技厅青年基金项目[桂科青0339012]
广西教育厅自筹项目(2003)资助
关键词
磷酸锌
水合物
结晶水
光谱分析
Zinc phosphate
HydrateCrystalline water
Spectral analysis
