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- W3046770171 abstract "In this study, BaTi0.65Zr0.35O3-2 mol% MgO ceramics with various amounts of Gd2O3 and SiO2 additives were prepared via a solid-state reaction method. The densification temperature of the BaTi0.65Zr0.35O3-2 mol%, MgO-2 mol%, and SiO2 ceramic was 1275 °C, with the addition of less than 2.0 mol% Gd2O3. The Gd3+ ions preferentially replaced the A-site ions. The densification temperature was reduced to 1225 °C, and the grain size of the ceramics was grown significantly up to 2.96 μm for 2 mol% Gd2O3, in addition to the formation of a trace amount of Ba2GdZrO5.5. There was a significant decline in the value of tanδ, and the electrical resistivity was increased by almost an order of magnitude due to the decrease in the VO•• concentration and the larger grain size. When the Gd2O3 content exceeded 2 mol%, the Gd3+ ions entered the B-site positions. For 5 mol% Gd2O3, the densification temperature is increased to over 1350 °C, the grain size reduced to 0.84 μm, and the value of tanδ is increased and the electrical resistivity is decreased as a result of the increasing VO•• concentration. The temperature coefficient of capacitance curves shows a nearly linear relationship between temperature and negative temperature coefficient and rotate counter-clockwise with an increase in Gd2O3 and SiO2 content. The BaTi0.65Zr0.35O3-2 mol% MgO-2 mol% SiO2 ceramics had a dielectric constant of 871 at room temperature, which decreased to 417 for 5 mol% Gd2O3. The dielectric constant of the BaTi0.65Zr0.35O3-2 mol% MgO ceramics, with and without the 2 mol% SiO2 additive, steadily declined by 10.2% at a bias field of 2.5 KV/mm. The magnitude of change in the dielectric constant has reduced significantly to 1.33% for the 5 mol% Gd2O3 additive." @default.
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- W3046770171 date "2020-12-01" @default.
- W3046770171 modified "2023-09-28" @default.
- W3046770171 title "DC bias characteristics of BaTi0.65Zr0.35O3 with additives (Gd2O3, SiO2, MgO) for multilayer ceramic capacitors" @default.
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- W3046770171 doi "https://doi.org/10.1016/j.ceramint.2020.07.323" @default.
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