Influence of Bi substitution on microwave dielectric properties of BaO–La2O3–Sm2O3–TiO2 ceramics
Influence of Bi substitution on microwave dielectric properties of BaO–La2O3–Sm2O3–TiO2 ceramics
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DOI：
10.1007/s10854-009-0044-8
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发表时间：
2010-11
期刊：
影响因子：
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通讯作者：
S. Bindra Narang;S. Bahel;S. Dash
中科院分区：
文献类型：
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作者：
S. Bindra Narang;S. Bahel;S. Dash
The influences of Bi substitution on microwave dielectric properties of Ba4(La0.5Sm0.5)9.33Ti18O54solid solutions were investigated. Dielectric ceramics with general formula Ba4(La(0.5−z)Sm0.5Biz)9.33Ti18O54,z= 0.0–0.2 were prepared by conventional solid state route. The structural analysis of all the samples was carried out by X-ray diffraction and scanning electron microscopy. The dielectric properties were investigated as a function of Bi contents using open-ended coaxial probe method in the frequency range 0.3–3.0 GHz at room temperature. Dielectric constant varies from 83 to 88 and loss tangent from 2.1 × 10−3to 5.5 × 10−3at 3 GHz with temperature coefficient of resonant frequency changing from 106.7 to −8.4 ppm/ºC as Bi contents increases fromz= 0.00–0.20. It has been found that dielectric constant and temperature coefficient of resonant frequency improve whereas loss tangent is adversely affected with increase in Bi substitution.
