摘要
采用共沉淀方法,以一定摩尔比的可溶性锌盐和铟盐为源物质,以氢氧化物作为沉淀剂,制备出了具有尖晶石结构的ZnIn2O4复合氧化物粉末。借助差热-热重(DTA-TG)分析可知ZnIn2O4的热变化过程,即在248℃附近由氢氧化物前驱物分解成氧化物,在340℃附近是氧化物的相转变,340℃以后为两氧化物的化合。利用X-射线衍射(XRD)分析知ZnIn2O4的晶体结构为尖晶石结构。对ZnIn2O4的气敏性能研究表明,由ZnIn2O4粉体制成的旁热式厚膜气敏元件无需掺杂,对乙醇、丙酮、氢气具有较高的灵敏度。
Compound oxide ZnIn2O4 powder with spinel structure was synthesized with solution of soluble zinc and indium salt that are under given Mole proportion and hydroxide as precipitator by chemical co-precipitation. The transition process of the product vary with heat is analyzed by DTA -TG, that is, forerunner hydroxide is resolved into oxides by 248℃, the phase transition of the oxide appears by 340℃, and the chemical combination between two oxides takes place at more than 340℃. By means of X - ray Diffraction （XRD）, the spinelle structure of the crystal is analyzed. The gas-sensing properties of the ZnIn2O4 are studied and the results reveal that the gas sensors based on ZnIn2O4 which is heater type and thick film have a high sensitivity to ethanol, acetone and H2 without doping
出处
《传感器世界》
2005年第12期18-21,共4页
Sensor World
