【作者】：Diao Q (Diao Quan),Yang FS (Yang Fasheng),Yin CG (Yin Chengguo),Li JG (Li Jianguo),Yang SQ (Yang Shiqi),Liang XS (Liang Xishuang)*,Lu GY (Lu Geyu)
【题目】：Ammonia sensors based on stabilized zirconia and CoWO4 sensing electrode
【关键词】：NH3 sensor,YSZ,CoWO4,GAS SENSOR,THIN-FILM,SELECTIVE DETECTION,SURFACE,AU,TEMPERATURE,NH3
【版面信息】：Solid State Ionics 225 (2012) 328-331
摘要:
A series of tungstate MWO4(M = Co, Zn and Ni) as been prepared by the polymeric precursor method. Meanwhile, yttria stabilized-zirconia (YSZ) based sensors using these oxides as sensing electrodes were investigated, and among the oxides tested, CoWO4was found to be the most suitable for the sensing electrode (SE) of the ammonia sensor. The sensor attached with CoWO4shows the fast response and recovery characteristics (not more than 5 s respectively and large sensitivity (-51 mV/decade) at elevated temperature. The electric potential difference (Delta V) of the sensor varies almost linearly with the NH3concentrations in the examined range of 50-1000 ppm. The SEM observation reveals that the special microstructure of CoWO4, bulky rod-like crystals coated by tiny particles, plays a significant role in sensing performance
