摘要
用厚膜技术制备了用于氧传感器的多孔铂电极。这种多孔铂电极浆料由纳米铂粉、银粉、氧化钇掺杂的氧化锆纳米粉末和有机载体组成。利用场发射扫描电镜研究了浆料的无机成分对烧成的铂电极微结构的影响。研究了组分对铂电极的过电位和传感器电阻的影响。结果表明:由纳米铂粉、银粉和氧化钇掺杂的氧化锆纳米粉组成的铂电极呈现疏松的海绵结构,并且过电位较低;使用同样量的三氧化二铋或硼硅酸玻璃釉代替银粉时,铂电极的电阻明显增加。使用银粉做黏结剂时,铂电极的电阻比使用同样量的三氧化铋或硼硅酸玻璃釉做黏结剂时要低。
Porous platinum electrode for an oxygen sensor was prepared by a thick film technology.Porous platinum electrode paste was formulated via mixing platinum nanopowder,silver powder,yttrium-stabilized zirconia （YSZ） powder and organic vehicle.The effect of the inorganic ingredient of the paste on the microstructure of the platinum electrode was investigated by field emission scanning electron microscope.The overpotential and the sensor resistance were examined.The surface morphology of the fired platinum electrode appeared porous and spongy,and the overpotential of the platinum electrode is lower even at a high current density when the electrode was consisted of platinum nanopowder,silver powder and YSZ powder.The sensor resistance with silver as a binder is lower than that with Bi2O3 or frit at the same amount.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2010年第1期153-157,共5页
Journal of The Chinese Ceramic Society
关键词
纳米材料
传感器
厚膜
多孔电极
nanocomposites
sensors
thick films
porous electrode
