Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10625874 | Ceramics International | 2013 | 5 Pages |
Abstract
Al-doped ZnO (AZO) powders with different Al concentrations were synthesized by coprecipitation method. Crystal structural and dielectric properties of the powders as a function of aluminum doping concentration as well as annealing temperature were investigated. The XRD results reveal that Al atoms are doped into ZnO lattice successfully and all the samples are polycrystalline with a hexagonal wurtzite structure. The real part (εâ²) and imaginary part (εâ³) of the complex permittivity of the powders were carried out by a vector network analyzer in the microwave frequency range of 8.2-12.4 GHz. The results show that the εⲠand εⳠof the doped ZnO powders increase with the doping content and both of them are higher than that of the pure one. For the AZO powder with 7 mol% Al, both εⲠand εⳠincrease firstly and then decrease with increasing annealing temperature.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Yuan Wang, Fa Luo, Ling Zhang, Dongmei Zhu, Wancheng Zhou,