Microwave dielectric properties of Bi-substituted La(Mg1/2Ti1/2)O-3

abstract

The system La(Mg1/2Ti1/2)O-3-Bi(Mg1/2Ti1/2)O-3 (LMT-BMT) was investigated in respect to formation of perovskite solid solutions based on lanthanum magnesium titanate. Single-phase perovskite (1 - x)LMT-xBMT ceramics (0 <= x <= 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, P2(1)/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 <= x <= 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. (C) 2006 Elsevier Ltd. All rights reserved.

keywords

CRYSTAL-STRUCTURE; CERAMICS; PEROVSKITES; SYSTEM

subject category

Materials Science

authors

Salak, AN; Ferreira, VM

our authors

Share this project:

Related Publications

We use cookies for marketing activities and to offer you a better experience. By clicking “Accept Cookies” you agree with our cookie policy. Read about how we use cookies by clicking "Privacy and Cookie Policy".