کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10625874 | 989637 | 2013 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microwave dielectric properties of Al-doped ZnO powders synthesized by coprecipitation method
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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چکیده انگلیسی
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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 39, Issue 8, December 2013, Pages 8723-8727
Journal: Ceramics International - Volume 39, Issue 8, December 2013, Pages 8723-8727
نویسندگان
Yuan Wang, Fa Luo, Ling Zhang, Dongmei Zhu, Wancheng Zhou,