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Study on Amorphous Hydrous Zirconia by Infrared Spectrum
Wang Dazhi,Luo Yi,Yang Lan,Yao Kun,Xiu Xiangqian,Wang Zheng,Tang Honggao,Yuan Wangzhi
Author NameAffiliation
Wang Dazhi University of Science and Technology of China,Hefei 230026 
Luo Yi University of Science and Technology of China,Hefei 230026 
Yang Lan University of Science and Technology of China,Hefei 230026 
Yao Kun University of Science and Technology of China,Hefei 230026 
Xiu Xiangqian University of Science and Technology of China,Hefei 230026 
Wang Zheng University of Science and Technology of China,Hefei 230026 
Tang Honggao University of Science and Technology of China,Hefei 230026 
Yuan Wangzhi Guizhou Technology University,Guiyang 550003 
Abstract:
The structures of precursor of zirconia(a kind of amorphous hydrous zirconia prepared by sol-gel)were studied by infrared spectrum(IR),X-ray diffraction(XRD),differential thermal analysis(DTA)and weight loss(TG)in detail.The results indicated that there are three different near structures in amorphous hydrous zirconia.The different near structures can be found by infrared adsorption spectrum.In the band of 1700~1200cm-1,there are four absorption peaks for hydroxyl bending vibration.They are 1633,1551,1400 and 1340cm-1 respectively.We suggest that the 1633cm-1 belonged to physical adsorbed H2O,the 1564cm-1 belonged to coordinated H2O,the 1400cm-1 belonged to bridging hydroxyl group,and the 1340cm-1 belonged to coordinated hydroxyl group.It indicates that there are four different hydroxyl groups in these amorphous hydrous zirconia,and three different near structures.We suggested three modals for them.The cause of formation of these different structures is the difference of pH values in their preparation sol-gel reaction.The reason of formation different crystalline phases of zirconia from amorphous hydrous zirconia prepared in different pH value is the different near structures of them.
Key words:  Infrared spectrum,Structure of amorphous material,Nano zirconia
FundProject:国家自然科学基金资助项目
非晶氧化锆水合物红外研究
王大志,罗毅,杨兰,姚琨,修向前,王正,汤洪高,袁望治
摘要:
用红外吸收光谱(IR)结合X射线衍射(XRD)、差热(DTA)和热失重分析(TG)详细研究了氧化锆前驱物(溶胶凝胶法制得的非晶态氧化锆水合物)的结构。实验结果表明在非晶态氧化锆水合物中有三种不同的近程结构。它表现为不同条件下制得的非晶氧化锆水合物的红外吸收谱在1700~1200cm-1水和羟基的弯曲振动吸收区出现1633、1551、1400和1340cm-1四个不同的羟基吸收峰。这表明样品中有三种不同近邻结构的羟基。根据实验结果我们提出了相应的非晶氧化锆水合物的近邻结构模型。造成这种结构差异的原因是制备过
关键词:  红外分析  非晶材料结构  纳米氧化锆
DOI:10.1088/1674-0068/13/4/481-486
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