摘要
用纳米钛酸钡粉末制成电阻式和电容式两种结构的湿敏元件,测量了两种结构元件在不同相对湿度,以及不同频率时的电阻、电容、阻抗等电学参数,对其特性曲线进行了对比分析.讨论了湿敏元件的感湿机理.研究表明,感湿特性主要是由纳米材料丰富的颗粒界面吸附水分产生表面效应和界面效应引起的.
A resistive-type and a capacitive-type humidity sensors are made of nanometer barium titanate（BaTiO3）.The resistance,capacitance and impedance are measured and analyzed at different relative humidity（RH） and frequency.The humidity mechanisms are discussed on this basis.It is showed that the humidity sensitive properties are determined mainly by the abundant interfaces among grains,which are affected by the absorbed water.
出处
《上海电力学院学报》
CAS
2010年第6期588-590,609,共4页
Journal of Shanghai University of Electric Power
基金
教育部科学技术研究重点项目(210072)
上海市教育委员会科研创新重点项目(10ZZ118)
关键词
纳米钛酸钡
湿敏元件
电阻式
电容式
nanometer barium titanate
humidity sensor
resistive-type
capacitive-type
