کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1607058 | 1516232 | 2016 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Dielectric properties and mixture behavior of y(Mg0.95Co0.05)4Ta2O9-(1-y)CaTiO3 ceramic system at microwave frequency
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The microstructures and the microwave dielectric properties of the y(Mg0.95Co0.05)4Ta2O9-(1-y)CaTiO3 ceramic system were investigated. In order to achieve a temperature coefficient of resonant frequency (Ïf) stable material, CaTiO3 (Ïf â¼Â +800 ppm/°C) was chosen as a Ïf compensator and added to (Mg0.95Co0.05)4Ta2O9 (Ïf â¼Â -59 ppm/°C) to form a two phase system. It was confirmed by the X-ray diffraction (XRD) and Energy dispersive X-ray (EDX) analysis. Although dielectric constant (εr) of the specimen could be boosted by increasing amount of CaTiO3, it would instead render a decrease in the quality factor (Q Ã f). The Ïf value is strongly correlated to the compositions and can be controlled through the existing phases. By appropriately adjusting the y-value in the y(Mg0.95Co0.05)4Ta2O9-(1-y)CaTiO3 ceramic system, near-zero Ïf value can be achieved. A new microwave dielectric material, 0.4(Mg0.95Co0.05)4Ta2O9-0.6CaTiO3 applicable in microwave devices are suggested and possesses the dielectric properties of a dielectric constant εr â¼Â 25.78, a Q Ã f value â¼200,000 GHz and a Ïf value â¼Â -4.69 ppm/°C. It is proposed as a very promising dielectric material for low-loss microwave and millimeter wave applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 661, 15 March 2016, Pages 357-362
Journal: Journal of Alloys and Compounds - Volume 661, 15 March 2016, Pages 357-362
نویسندگان
Bing-Jing Li, Sih-Yin Wang, Chen-Yu Chiu, Shih-Hung Lin, Yuan-Bin Chen,