| TeO2薄膜非水解溶胶-凝胶法制备及聚合机制 |
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| 引用本文： | 魏恒勇,林健,李东卫,冯昭彬.TeO2薄膜非水解溶胶-凝胶法制备及聚合机制[J].同济大学学报(自然科学版),2011,39(8). |
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| 作者姓名： | 魏恒勇 林健 李东卫 冯昭彬 |
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| 作者单位： | 1. 同济大学材料科学与工程学院,上海 200092;河北联合大学材料科学与工程学院,河北唐山 063009
2. 同济大学材料科学与工程学院,上海,200092 |
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| 基金项目： | 上海市科学技术委员会纳米专项基金(0852nm06500); 国家自然科学基金(50572069) |
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| 摘 要： | 分别以1,2-丙二醇碲和四氯化碲为原料,采用非水解溶胶-凝胶法制备TeO2薄膜.研究了非水解溶胶-凝胶聚合过程的聚合机制以及TeO2薄膜热处理过程中的微观结构变化.研究结果表明,1,2-丙二醇碲为链状齐聚团簇结构,齐聚团簇间通过非水解脱醚聚合反应形成凝胶网络;四氯化碲则先与乙醇发生部分取代反应生成中间产物氯代乙醇碲,中间产物间发生非水解脱氯代烷聚合反应形成凝胶.分析表明,2种凝胶中残余有机基团的数量和所处地位存在差异,其造成薄膜中的Te4+以不同方式还原为Te0.脱氯代烷聚合凝胶网络中残余的氯离子会造成薄膜中非桥氧数目增加,并导致Te2O5晶体析出.随着煅烧温度提高,金属Te和Te2O5分别氧化分解为TeO2,同时依次析出了β-TeO2和α-TeO2.
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| 关 键 词： | 非水解溶胶-凝胶法 TeO2薄膜 聚合机制 |
Preparation of TeO2Thin Film by NonhydrolyticSol-gel Method and Its Polymerization Mechanism |
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| WEI Hengyong,LIN Jian,LI Dongwei,FENG Zhaobin.Preparation of TeO2Thin Film by NonhydrolyticSol-gel Method and Its Polymerization Mechanism[J].Journal of Tongji University(Natural Science),2011,39(8). |
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| Authors: | WEI Hengyong LIN Jian LI Dongwei FENG Zhaobin |
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| Institution: | WEI Hengyong1,2,LIN Jian1,LI Dongwei1,FENG Zhaobin1(College of Material Science and Engineering,Tongji University,Shanghai 200092,China,2.College of Material Science and Engineering,Hebei United University,Tangshan 063009,China) |
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| Abstract: | TeO2 thin films were prepared by nonhydrolytic sol-gel method with tellurium 1,2-propylene diglycollate and tellurium tetrachloride as raw materials,respectively.The nonhydrolytic sol-gel polymerization mechanism and the microstructure transformation process of the gel films during calcining were studied.The results show that tellurium 1,2-propylene diglycollate can form chainlike polymeric molecules,and the nonhydrolytic condensation reaction proceeds between the associated molecular clusters through ether... |
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| Keywords: | Nonhydrolytic sol-gel process TeO2 thin film polymerization mechanism |
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