Abstract: The analytically pure ZnSO4·7H2O and neodymium oxide were used as raw materials,and were homogeneously deposited with ammonian-carboncate(analytical pure) solution.The precursor Nd-doped basic zinc carbonate was obtained after series of chemical treatment.The precursor was calcinated under the air condition of 700 ℃ for 2 h to obtain nano-meter Nd-doped ZnO powders,in which the molar rate of Nd to Zn is 1∶100,the average size of ZnO powders is about 30 nm.The gas sensitivity properties of ZnO paste sensor t...