基于氢敏材料的WO_3溶胶稳定性的影响因素研究  

Study on Stability of Nano Colloidal WO_3 Used as Hydrogen Sensing Materials

作　　者：范小花[1] 唐一科[2] 侯长军[2] 范瑛[3] 

机构地区：[1]重庆科技学院安全工程学院,重庆400042 [2]重庆大学机械传动国家重点实验室,重庆400030 [3]中国工程物理研究院结构力学研究所,绵阳621000

出　　处：《材料导报》2012年第8期98-101,共4页Materials Reports

基　　金：国家自然科学基金(11076030;10376045)

摘　　要：采用钨粉和双氧水反应制备了WO3溶胶,考察了双氧水(H2O2)加入量、无水乙醇加入量、陈化温度和时间对溶胶稳定性的影响。研究表明,H2O2和乙醇的加入能增强WO3溶胶的稳定性,当H2O2与钨酸的物质的量比为1∶2、乙醇与WO3溶胶体积比为1∶2时,所制备的WO3溶胶在室温下可稳定存在3个月以上,溶胶成膜质量最佳。WO3溶胶陈化温度越高,溶胶的稳定时间越短。研究了WO3溶胶陈化时间与粘度的关系,并试验得出了最佳的成膜条件,即陈化时间越长,WO3溶胶粘度越大,当WO3溶液粘度为180～300mPa.s时成膜质量较好。The nano colloidal WO3 was prepared by reaction of tungsten powder and H2 O2, and the effects of H2O2 content, ethanol content, storage temperature and time on stability of WO3 sol were investigated. The results show that HzO2 and ethanol can enhance the stability of WO3 sol. When the molar ratio of H2O2 and tungstic acid is 1 ： 2, the volume ratio of ethanol and tungstic acid is 1 - 2, the WO3 sol can be stabilized more than three months at room temperature, and the films made by the WOa sol are best. With the increasing of storage temperature, the stability of WO3 sol is lower. The relationship between tungstenic acid＇s viscosity and storage time was researched, and the best filming condition was obtained： with the storage time is longer, the viscosity of WO3 sol is larger, and when the viscosity of WO3 sol is 180-300mPa s, the quality of the film made by the sol is good.

关 键 词：WO3溶胶 稳定性 薄膜 粘度 

分 类 号：O614.6[理学—无机化学] TQ426[理学—化学]