Přístupnostní navigace
E-přihláška
Vyhledávání Vyhledat Zavřít
Detail publikace
FILIPOVIĆ, S. PAVLOVIĆ, V. OBRADOVIĆ, N. PAUNOVIĆ, V. MACA, K. PAVLOVIĆ, V.
Originální název
The impedance analysis of sintered MgTiO3 ceramics
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
angličtina
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.
Klíčová slova
Mechanical activation AC impedance analysis SEM Titanate-based ceramics
Autoři
FILIPOVIĆ, S.; PAVLOVIĆ, V.; OBRADOVIĆ, N.; PAUNOVIĆ, V.; MACA, K.; PAVLOVIĆ, V.
Vydáno
15. 4. 2017
ISSN
0925-8388
Periodikum
Journal of Alloys and Compounds
Ročník
701
Číslo
1
Stát
Švýcarská konfederace
Strany od
107
Strany do
115
Strany počet
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" }