【摘要】 以Zn(NO3)2.6H2O,Al(NO3)3.9H2O,尿素为原料,采用均相沉淀法,制备出碱式碳酸锌粉末,之后将前驱体在氢气气氛下煅烧,制得Al掺杂氧化锌导电粉。利用SEM,TGA,XPS和XRD等分析手段对材料性能进行表征,研究了Al掺杂氧化锌导电性能的影响。结果表明:随着Al 3+掺杂量的增大,粉体体积电阻率先降低后升高,Al 3+掺杂含量在1.5%(摩尔分数)时电阻率最低,为1.05×105Ω.cm。掺杂后的ZnO为六方纤锌矿结构,颗粒呈类椭球形,粒度分布窄,导电性能明显提高。更多还原

【Abstract】 Using zinc nitrate,aluminium nitrate and urea as raw materials,basic zinc carbonate powder was prepared by homogeneous precipitation,Al-doped ZnO powders were prepared by calcining the precursor.The property was characterized by SEM,TGA,XPS and XRD.The results show that the volume resistivity of the zinc oxide decreases to 1.05×105 Ω·cm when the Al3+ doping content is 1.5%(mole fraction),much lower than that of the conventional zinc oxide powders.Al-doped ZnO nanoparticles are wurtzite structure,and similar to ellipsoidal.The grain size distribution of doped ZnO nanopowders is narrow.Meanwhile,the conductivity of Al-doped ZnO powders was improved greatly.更多还原