Stabilization of the low temperature coefficient of dielectric constant of Ca{sub 5}Nb{sub 2}TiO{sub 12} by Zr doping
Journal Article
·
· Materials Research Bulletin
Microwave communications devices involve the use of filters and resonators that have a ceramic dielectric as an essential component. To meet the requirements for use in such devices, dielectric materials must satisfy stringent property restriction. The effects of small amounts of Zr substitution for Ti in the low loss, low temperature coefficient dielectric material Ca{sub 5}Nb{sub 2}TiO{sub 12} are reported. Substitutions at the 1--5% level significantly increase the range of possible firing temperatures at which polycrystalline ceramics with low temperature coefficients can be obtained. This low temperature coefficient state is at the borderline between ordered and disordered states of the Ca, Nb, and Ti ions in the B sites of the perovskite lattice. The kinetics for ordering is apparently enhanced by the Zr substitutions.
- Research Organization:
- Lucent Technology Bell Labs., Murray Hill, NJ (US)
- OSTI ID:
- 20020599
- Journal Information:
- Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 12-13 Vol. 34; ISSN MRBUAC; ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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