Publication detail

The impedance analysis of sintered MgTiO3 ceramics

FILIPOVIĆ, S. PAVLOVIĆ, V. OBRADOVIĆ, N. PAUNOVIĆ, V. MACA, K. PAVLOVIĆ, V.

Original Title

The impedance analysis of sintered MgTiO3 ceramics

Type

journal article in Web of Science

Language

English

Original Abstract

In the present study the effect of preparation conditions on microstructure and electrical properties of MgTiO3 ceramics was investigated. Mixture of MgO and TiO2 powders was subjected to mechanical activation for different time periods. Two types of sintering (two-step and HIP sintering) were performed on green bodies prepared by cold isostatic pressing. AC impedance spectroscopy in the low-frequency range (from 20 Hz to 1 MHz), at room and elevated temperatures, were performed in order to separate contribution of grains and grain boundaries to capacitance, resistance and conductivity of magnesium titanate ceramics. The special attention was directed to explanation of the influence of mechanical activation on electrical and morphological changes in sintered samples. The significant decrease of partial oxygen pressure in HP sintering atmosphere caused the change from insulating behavior of MgTiO3 samples after two-step sintering to semiconducting one.

Keywords

Mechanical activation AC impedance analysis SEM Titanate-based ceramics

Authors

FILIPOVIĆ, S.; PAVLOVIĆ, V.; OBRADOVIĆ, N.; PAUNOVIĆ, V.; MACA, K.; PAVLOVIĆ, V.

Released

15. 4. 2017

ISBN

0925-8388

Periodical

Journal of Alloys and Compounds

Year of study

701

Number

1

State

Swiss Confederation

Pages from

107

Pages to

115

Pages count

9

BibTex

@article{BUT135123,
  author="Suzana {Filipović} and V.P. {Pavlović} and Nina {Obradović} and Vesna V. {Paunović} and Karel {Maca} and Vladimir B. {Pavlović}",
  title="The impedance analysis of sintered MgTiO3 ceramics",
  journal="Journal of Alloys and Compounds",
  year="2017",
  volume="701",
  number="1",
  pages="107--115",
  doi="10.1016/j.jallcom.2017.01.117",
  issn="0925-8388"
}