کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10629498 | 991066 | 2015 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Correlation between vibrational modes and dielectric properties in (Ca1â3xBi2xΦx)MoO4 ceramics
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Correlation between vibrational modes and dielectric properties in (Ca1â3xBi2xΦx)MoO4 ceramics Correlation between vibrational modes and dielectric properties in (Ca1â3xBi2xΦx)MoO4 ceramics](/preview/png/10629498.png)
چکیده انگلیسی
The Raman, infrared reflectivity and terahertz spectra of A-site deficient scheelite materials (Ca1â3xBi2xΦx)MoO4 (Φ: A-site vacancy) were studied to evaluate the correlation between the vibrational modes and the dielectric properties. The Raman spectra were fitted with the Lorentzian model and the changes of resonance frequencies and full width at half maximum of the resonance were discussed. With the substitution of Bi into the A site of CaMoO4, the associated ionic compensation produces an increase in disorder which can contribute to an increase in dielectric losses. The harmonic oscillator model was used to fit infrared reflectivity spectra and the obtained complex dielectric response was extrapolated down into the terahertz and microwave region. The contributions of each mode to the microwave dielectric properties were investigated. It was found that the modes at low frequencies which are related to AO8 polyhedra play the most important role in the microwave dielectric properties of (Ca1â3xBi2xΦx)MoO4.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 35, Issue 16, December 2015, Pages 4459-4464
Journal: Journal of the European Ceramic Society - Volume 35, Issue 16, December 2015, Pages 4459-4464
نویسندگان
Jing Guo, Clive A. Randall, Di Zhou, Gaoqun Zhang, Caihong Zhang, Biaobing Jin, Hong Wang,