کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1526828 | 995375 | 2008 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Nonlinear dielectric properties of sol-gel derived (Ba,Sr)TiO3 ceramics
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Nonlinear dielectric properties of sol-gel derived (Ba,Sr)TiO3 ceramics Nonlinear dielectric properties of sol-gel derived (Ba,Sr)TiO3 ceramics](/preview/png/1526828.png)
چکیده انگلیسی
The effect of dc electric field and temperature on dielectric properties of sol-gel derived (Ba0.65Sr0.35)TiO3 (BST35) ceramics were investigated. It is observed that the phase transition of BST35 sample is a weak diffusion phase transition. The value of γ characterizing the degree of diffuse transition is 1.46, 1.49, 1.53 and 1.51, respectively for BST35 sample measured at frequency of 100 Hz, 1 kHz, 10 kHz and 100 kHz. The results indicate that the nonlinear dielectric properties for the BST35 ceramics at room temperature is expected to be very strong. The permittivity become very high and the polarization that can be induced by even a small field can be quite large at temperature near to the transition temperature. The loss tangent values were decreased significantly at temperatures above the transition temperature. The dielectric constant was greatly suppressed under dc electric field. At room temperature (293 K) and 20 kV cmâ1, the tunability (k) and figure of merit (FOM) were 60% and 60.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 112, Issue 1, 15 November 2008, Pages 281-284
Journal: Materials Chemistry and Physics - Volume 112, Issue 1, 15 November 2008, Pages 281-284
نویسندگان
Q.X. Liu, X.G. Tang, Y.Y. Deng, J. Wang, H.L.W. Chan,