杂化纳米Gd_(0.1)Ce_(0.9)O_(2-δ)湿敏传感器的性能研究

Research of Performance of Hybridized Nano-Gd_(0.1)Ce_(0.9)O_(2-δ)-δHumidity Sensitive Sensor

采用溶胶凝胶法制备了摩尔分数为10%的钆离子掺杂二氧化铈的Gd_(0.1)Ce_(0.9)O_(2-δ)(GDC10)纳米粉体,并通过一系列测试表征了粉体的物相、形貌结构、晶粒尺寸及比表面积,利用高压喷涂法在金叉指电极上制备出电容式湿敏传感器,研究了传感器在频率为100 Hz环境下的湿敏特性。结果表明,GDC10具备良好的湿敏性能,它的介电常数随湿度增加而快速增加,湿度传感器的介电常数增长率达到6.72,是纯CeO_(2)的25倍,最大滞后误差约为4.9%,响应恢复时间低于1 min,并且具有极好的重复性。最后,分析了GDC10的高增敏湿敏机制。

The Moore component of 10%Gd ion-doped Gd_(0.1)Ce_(0.9)O_(2-δ)(GDC10)nano-powder were prepared by sol-gel method.The phase,morphology structure,grain size and specific surface area of the powder were analyzed and characterized by a series of testing methods,and a capacitive humidity sensor was fabricated on a gold interdigitated electrode by the method of high voltage spraying,and the humidity sensing characteristics of the sensor under a frequency of 100 Hz were investigated.The results reveal GDC10 composites have good humidity sensing properties,and its dielectric constant rapidly increases with the increasing of relative humidity.Dielectric constant growth rate is up to 6.72,which is 25 times as much as pure CeO _(2),and the maximum hysteresis error is about 4.9%,and response recovery time is less than 1 minute,and good repeatability are achieved on this sample.Finally,the mechanism of high humidity sensitivity for GDC10 material is analyzed.