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- W2008668268 abstract "Ba(Mg1/3Ta2/3)O3 (BMT) is a very important microwave dielectric resonator material with a high dielectric constant of about 25, high quality factor and small temperature variation of resonant frequency. The preparation temperature of BMT ceramics is relatively high, about 1650 °C. The microwave quality factor of BMT depends on the ordering of Mg–Ta–Ta ions on the perovskite B-site. In the present paper we report how one can tailor the properties of BMT ceramics by glass addition, slight non-stoichiometry and by dopant addition. (a) It is found that addition of small amount of glasses such as B2O3, ZnO–B2O3, ZnO–2B2O3, ZnO–B2O3–SiO2 reduces the sintering temperature, increases density, order parameter and quality factor. (b) Slight Mg or Ba deficiency improves densification, order parameter and quality factor whereas excess Mg or Ba deteriorated the properties (c) Small amounts of dopants such as Sb2O5, MnCO3, ZrO2, WO3, SnO2 and ZnO improve the microwave dielectric properties. It is found that the quality factor is maximum when the ionic radii of the dopant ions are close to the weighted average ionic radii of B site ions (i.e. Mg1/3Ta2/3), which is 0.653 Å." @default.
- W2008668268 created "2016-06-24" @default.
- W2008668268 creator A5059835184 @default.
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- W2008668268 date "2006-01-01" @default.
- W2008668268 modified "2023-10-01" @default.
- W2008668268 title "Tailoring the microwave dielectric properties of Ba(Mg1/3Ta2/3)O3 ceramics" @default.
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- W2008668268 doi "https://doi.org/10.1016/j.jeurceramsoc.2005.09.024" @default.
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