期刊论文详细信息
Bulletin of Materials Science
Electrical and optical properties of ZnO–WO$_3$ nanocomposite and its application as a solid-state humidity sensor
关键词: Sensor;    humidity;    adsorption;    hysteresis;    porous.;   
学科分类:材料工程
来源: Indian Academy of Sciences
PDF
【 摘 要 】

This study reports the humidity sensing characteristics of ZnO–WO$_3$nanocomposite. Pellet samples of 0–5 weight% ZnO in WO$_3$ were sintered from 300 to 600$^{\circ}$C. When exposed to humidity, the resistance of the sensing samples was found to decrease with increase in relative humidity (RH). Five percent ZnO-doped WO$_3$ showed maximum sensitivity of 20.95 M$\Omega$/%RH in 15–95% RH range. Sensor parameters like reproducibility, aging, hysteresis, response and recovery times were also studied. Sensing mechanism is discussed in terms of sintering temperature, composition and crystallite size of the sensing element. It was observed that sensing mechanism is strongly based on annealing temperature and percentage of doping. The sensing samples have also been investigated by X-ray diffraction, scanning electron microscope (SEM) and Raman spectroscopy. The crystalline size of the sample was identified by powder X-Ray Diffraction data. The SEM analysis was used to study the surface morphology. The structure, phase and the degree of crystallinity of the materials were examined by Raman spectroscopy.

【 授权许可】

CC BY   

【 预 览 】
附件列表
Files Size Format View
RO201902184376797ZK.pdf 275KB PDF download
  文献评价指标  
  下载次数:21次 浏览次数:10次