Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1476684 | Journal of the European Ceramic Society | 2007 | 5 Pages |
Abstract
The system La(Mg1/2Ti1/2)O3-Bi(Mg1/2Ti1/2)O3 (LMT-BMT) was investigated in respect to formation of perovskite solid solutions based on lanthanum magnesium titanate. Single-phase perovskite (1 â x)LMT-xBMT ceramics (0 â¤Â x â¤Â 0.3) were prepared and their crystal structure and dielectric properties were studied. It has been found that within the solubility range the crystal structure of Bi-substituted LMT remains monoclinic, P21/n. Unit cell volume was evaluated to be almost independent on x, varying within the experimental error. Relative permittivity of the ceramics increases by almost a factor of 3 in the range 0 â¤Â x â¤Â 0.3 and its value is 40-45 at the compositional region where temperature coefficient of the resonant frequency passes a zero-value. Compositional and temperature variations of the dielectric parameters for LMT-BMT estimated at different frequency ranges are considered in comparison with those observed in other Bi-substituted ceramics based on LMT.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Andrei N. Salak, Victor M. Ferreira,