کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7898602 | 1510137 | 2018 | 17 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The dielectric and microwave absorption properties of polymer-derived SiCN ceramics
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The polymer-derived SiCN ceramics were synthesized at different annealing temperature (900 â¼Â 1400 °C). The XRD, SEM, FT-IR, Raman and XPS were used to analyze the phase composition and microstructure. The result indicated that the crystallization degree and content of free carbon gradually improved with the increase of annealing temperature. The resistivity, dielectric and microwave absorption properties of the samples were studied at 2 â¼Â 18 GHz. The resistivity decreased gradually as the annealing temperature rose. The dielectric constant of sample decreased with the increase of frequency in 1 â¼Â 5 MHz. The existence of free carbon could improve the dielectric properties of polymer-derived SiCN ceramics at high frequency. The reflectance of the sample synthesized at 1100 °C was below â10 dB (> 90% absorption) in a wide frequency range of 6 â¼Â 16 GHz and the maximum value of dielectric loss angle tangent was about 0.6 at 16 GHz.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 38, Issue 4, April 2018, Pages 1327-1333
Journal: Journal of the European Ceramic Society - Volume 38, Issue 4, April 2018, Pages 1327-1333
نویسندگان
Xue Guo, Yurun Feng, Xiao Lin, Yu Liu, Hongyu Gong, Yujun Zhang,