Detail publikace

The impedance analysis of sintered MgTiO3 ceramics

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

Originální název

The impedance analysis of sintered MgTiO3 ceramics

Anglický název

The impedance analysis of sintered MgTiO3 ceramics

Jazyk

en

Originální abstrakt

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.

Anglický abstrakt

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.

Dokumenty

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",
  annote="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.",
  chapter="135123",
  doi="10.1016/j.jallcom.2017.01.117",
  howpublished="print",
  number="1",
  volume="701",
  year="2017",
  month="april",
  pages="107--115",
  type="journal article in Web of Science"
}