The effect of BaTiO₃ particle shape on complex permittivity of 0.98MgTiO₃–0.02BaTiO₃ composite powders at GHz frequencies
Tuhkala, Marko; Maček, M.; Siponkoski, Tuomo; Juuti, Jari; Teirikangas, Merja; Suvorov, D.; Jantunen, Heli (2016-04-01)
M. Tuhkala, M. Maček, T. Siponkoski, J. Juuti, M. Teirikangas, D. Suvorov, H. Jantunen, The effect of BaTiO particle shape on complex permittivity of 0.98MgTiO–0.02BaTiO composite powders at GHz frequencies, Materials Research Bulletin, Volume 76, 2016, Pages 300-304, ISSN 0025-5408, http://dx.doi.org/10.1016/j.materresbull.2015.12.043.
© 2015 Elsevier Ltd. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
https://creativecommons.org/licenses/by-nc-nd/4.0/
https://urn.fi/URN:NBN:fi-fe201706277479
Tiivistelmä
Abstract
The effect of BaTiO₃ particle shape on the properties of 0.98MgTiO₃–0.02BaTiO₃ composite powders was characterized and analyzed using an indirectly coupled open-ended coaxial cavity resonator at gigahertz frequencies. Elongated micrometre sized BaTiO₃ particles were found to have a significantly stronger effect on permittivity when compared to composite powders having micro and nano sized spherical BaTiO₃ particles. Inclusion permittivities and dielectric loss tangents of composite powders increased from that of pure MgTiO₃ powder, 13.3 and 4.6 × 10⁻³, up to 15.7 and 1.7 × 10⁻² with needle shaped BaTiO₃ particles, respectively. The presented results give valuable information for tailoring the properties of dielectrics which can be utilized in the vast field of electronic component manufacturing.
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