University of Oulu

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,

The effect of BaTiO₃ particle shape on complex permittivity of 0.98MgTiO₃–0.02BaTiO₃ composite powders at GHz frequencies

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Author: Tuhkala, Marko1; Maček, M.2; Siponkoski, Tuomo1;
Organizations: 1Microelectronics and Materials Physics Laboratories, University of Oulu, P.O. Box 4500, FIN-90014 Oulu, Finland
2Advanced Materials Department, Jožef Stefan Institute, Jamova cesta 36, SI-1000 Ljubljana, Slovenia
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.7 MB)
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Language: English
Published: Elsevier, 2016
Publish Date: 2018-04-01


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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Series: Materials research bulletin
ISSN: 0025-5408
ISSN-E: 1873-4227
ISSN-L: 0025-5408
Volume: 76
Issue: April
Pages: 300 - 304
DOI: 10.1016/j.materresbull.2015.12.043
Type of Publication: A1 Journal article – refereed
Field of Science: 213 Electronic, automation and communications engineering, electronics
Funding: The authors gratefully acknowledge the project “Innoinks” 906/31/2010 funded by Tekes (FIN), Sachtleben Pigments Oy (FIN), Pulse Finland Oy (FIN) and NOF Corporation (JAP). The work has received funding from the European Research Council (ERC) grant agreement No. 291132. Author Jari Juuti acknowledges the funding of the Academy of Finland (project numbers 273663 and 267573).
EU Grant Number: (291132) ULTIMATE CERAMICS - Printed Electroceramics with Ultimate Compositions
Academy of Finland Grant Number: 273663
Detailed Information: 273663 (Academy of Finland Funding decision)
267573 (Academy of Finland Funding decision)
Copyright information: © 2015 Elsevier Ltd. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license