Al掺杂ZnO纳米粉体的制备及其气敏性能研究

发布时间：2018-05-04 00:27

  本文选题：氧化锌 + 气敏　； 参考：《陶瓷学报》2017年04期

【摘要】：以氯化锌和异丙醇铝为原料,异丙醇为溶剂,采用非水解溶胶-凝胶法制备了铝掺杂的氧化锌纳米粉体。利用X射线衍射仪(XRD)、场发射扫描电子显微镜(FESEM)分析了产物的晶体结构和形貌,并测试了其气敏性能。实验结果表明,铝掺杂的氧化锌纳米粉体属于六方纤锌矿结构,铝掺杂量为1.5%时该材料对甲醛气体具有较高的灵敏度。工作温度为260℃时,对500 ppm甲醛气体的灵敏度可达12.07。同时,该材料还具有较好的响应-恢复特性,响应时间和恢复时间分别为18 s和12 s。在50-2000 ppm的甲醛气体范围内,随着甲醛浓度增大,材料的灵敏度呈上升趋势。
[Abstract]:Using zinc chloride and aluminum isopropanol as raw materials and isopropanol as solvent, aluminum doped zinc oxide nanocrystals were prepared by unhydrolyzed sol-gel method. The crystal structure and morphology of the product were analyzed by means of X-ray diffractometer and field emission scanning electron microscope (FESEM). The gas sensing properties of the product were also measured. The experimental results show that the Al-doped ZnO nano-powder belongs to hexagonal wurtzite structure, and the material has a high sensitivity to formaldehyde gas when the Al doping amount is 1.5. When the operating temperature is 260 鈩，

本文编号：1840780