Dielectric properties of the "Twinned" 8H-Hexagonal Perovskite Ba8Nb4Ti3O24

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RAWAL, Ritesh, FETEIRA, Antonio, FLORES, Alberto Arenas, HYATT, Neil C., WEST, Anthony R., SINCLAIR, Derek C., SARMA, Kumaravinothan and ALFORD, Neil McN. (2006). Dielectric properties of the "Twinned" 8H-Hexagonal Perovskite Ba8Nb4Ti3O24. Journal of the American Ceramic Society, 89 (1), 336-339. [Article]

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Abstract

The dielectric properties of dense ceramics of the "twinned" 8H-hexagonal perovskite Ba8Nb4Ti3O24 are reported. Single-phase powders were obtained from the mixed-oxide route at 1325 degrees C and ceramics (> 92% of the theoretical X-ray density) by sintering in air or flowing 02 at 1400 degrees-1450 degrees C. The ceramics are dc insulators with a band gap > 3.4 eV that resonate at microwave frequencies with relative permittivity, epsilon(r) similar to 44-48, quality factor, Q x f(r) similar to 21000-23500 GHz (at f(r) similar to 5.5 GHz) and temperature coefficient of resonant frequency, TCf similar to + 115 ppm/K.

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Official URL:

http://dx.doi.org/10.1111/j.1551-2916.2005.00665.x

Research Institute, Centre or Group - Does NOT include content added after October 2018:

Materials and Engineering Research Institute > Structural Materials and Integrity Research Centre > Centre for Corrosion Technology

Page Range:

336-339

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Identification Number:

10.1111/j.1551-2916.2005.00665.x

ORCID for Antonio Feteira: