ZnO-Sb_2O_3烧结体系的电导和气敏性能

Conductivity and Gas Sensitivity of ZnO-Sb_2O_3 Sintered System

采用金属蒸气氧化的方法制备了四针状ZnO和近球形Sb2O3纳米颗粒.检测了基于ZnO-Sb2O3烧结体系的电导和气敏性能.通过XRD分析不同重量百分比的ZnO和Sb2O3混合粉末在烧结后的物相变化,据此讨论了ZnO-Sb2O3烧结体系的电导和气敏性能的变化.结果表明:纳米颗粒可以在较低的烧结温度下发生固相反应,并且生成的复合氧化物ZnSb2O6和Zn2.33Sb0.67O4对烧结厚膜的电导和气敏性能起调控作用.

ZnO tetrapod nanowhiskers and Sb2O3 quasi-spherical nanoparticles were prepared by metallic vapour-phase oxidation, and the conductivity and gas sensitivity of thick films based on ZnO-Sb2O3 sintered system were investigated. The changes in conductivity and gas sensitivity of the thick film were discussed in according to the phase change of the mixed-powder sintered at 650degreesC for 2h examined by XRD. The result showed that the nanoparticles could take place solid-phase reaction at lower sintering temperature and the conductivity and gas sensitivity of the thick film could be modified and controlled by newly formed complex oxide, i.e., ZnSb2O6 and Zn2.33Sb0.67O4.