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Time dependence of dielectric constants of Pb(Mg1/3Nb2/3)O3-BaTiO3-PbTiO3 ferroelectric ceramics for X7R MLCs

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Abstract

The isothermal ageing behaviour of Pb(Mg1/3Nb2/3)O3-BaTiO3-PbTiO3 ceramics, promising high dielectric (ε25°C = 4574) materials for X7R multilayer ceramic capacitors (MLCs) was studied over a wide range of frequencies. During ageing, the dielectric constants and loss tangents decreased linearly with the logarithm of ageing time. The ageing rates were evidently influenced by the test frequencies. The maximum value, within the range 0.1 to 1000 kHz, was about 1.7% per decade (time) and meets the corresponding ageing specifications for X7R ceramic dielectrics.

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  1. Department of Materials Science and Engineering, Tsinghua University, Beijing, 100 084, China

    LIJIAN RUAN, YU WANG, ZHILUN GUI & LONGTU LI

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  1. LIJIAN RUAN
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  2. YU WANG
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  3. ZHILUN GUI
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  4. LONGTU LI
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RUAN, L., WANG, Y., GUI, Z. et al. Time dependence of dielectric constants of Pb(Mg1/3Nb2/3)O3-BaTiO3-PbTiO3 ferroelectric ceramics for X7R MLCs. Journal of Materials Science: Materials in Electronics 8, 195–197 (1997). https://doi.org/10.1023/A:1018502415112

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