Microwave dielectric properties of hexagonal 12R-Ba3LaNb3O12 ceramics

RAWAL, Ritesh, FETEIRA, Antonio, HYATT, Neil C., SINCLAIR, Derek C., SARMA, Kumaravinothan and ALFORD, Neil McN. (2006). Microwave dielectric properties of hexagonal 12R-Ba3LaNb3O12 ceramics. Journal of the American Ceramic Society, 89 (1), 332-335.

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Official URL: http://dx.doi.org/10.1111/j.1551-2916.2005.00664.x
Link to published version:: 10.1111/j.1551-2916.2005.00664.x

Abstract

The dielectric properties of dense ceramics of the n = 0 member of a newly identified homologous series Ba3+nLaNb3TinO12+3n, where n = 0, 1, and 2, are reported. Single-phase powders can be obtained from the mixed-oxide route at 1350 degrees C and dense ceramics (> 97% of the theoretical X-ray density) with uniform microstructures; (3-5 mu m) can be obtained by sintering in air at 1500 degrees C. The ceramics are excellent dc insulators with a band gap > 2.6 eV that resonate at microwave frequencies with a relative permittivity, epsilon(r) similar to 44, a quality factor, Q x f(r) of similar to 9000 at f(r) similar to 5.5 GHz and a temperature coefficient of resonant frequency, TCf similar to -100 ppm/K.

Item Type: Article
Research Institute, Centre or Group: Materials and Engineering Research Institute > Structural Materials and Integrity Research Centre > Centre for Corrosion Technology
Identification Number: 10.1111/j.1551-2916.2005.00664.x
Depositing User: Hilary Ridgway
Date Deposited: 07 Jun 2012 09:52
Last Modified: 07 Jun 2012 09:52
URI: http://shura.shu.ac.uk/id/eprint/5343

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