Publication Date:
2011-07-16
Description:
By the conventional mixed oxide method (1− x )Bi(Mg 1/2 Ti 1/2 )O 3 – x BaTiO 3 ((1− x )BMT– x BT, x = 0.2−1.0) ceramics were prepared. For x ≤ 0.4, a bismuth-rich phase was observed beside the perovskite phase. For 0.5 ≤ x ≤ 0.92 ceramics, all the compositions belong to the pseudocubic phase, while the tetragonal phases were formed when x ≥ 0.94. With the increase of BT content, a change from a relaxor-like behavior to a normal ferroelectric behavior was observed, while the change of T max is in the form of “U” curve. Furthermore, stable dielectric permittivity (1500–3000) and low losses (tan δ 〈 2%) were obtained in the 0.4 ≤ x ≤ 0.6 ceramics in the temperature range 200°C–400°C, indicating a potential for high-temperature applications.
Print ISSN:
0002-7820
Electronic ISSN:
1551-2916
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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