Detail publikace

Effect of consolidation parameters on structural, microstructural and electrical properties of magnesium titanate ceramics

FILIPOVIĆ, S. OBRADOVIĆ, N. PAVLOVIĆ, V. MITRIĆ, M. DORDEVIC, A. KACHLÍK, M. MACA, K.

Originální název

Effect of consolidation parameters on structural, microstructural and electrical properties of magnesium titanate ceramics

Anglický název

Effect of consolidation parameters on structural, microstructural and electrical properties of magnesium titanate ceramics

Jazyk

en

Originální abstrakt

The aim of this study is to explore the influence of the processing route on the structural and physical properties of bulk MgTiO3 ceramics. Commercially available MgO and TiO2 powders were mechanically activated in aplanetary ball mill. Green bodies were formed by an isostatic pressure of 300MPa. The sintering of these samples was done either by theTwo-Step Sintering (TSS) approach or by conventional pressure less sintering followed by Hot Isostatic Pressing (post-HIPing). The first set of compacts was sintered by TSS in air at 1300 °C for 30 min and the next step was performed at 1200 °C for 20h. The density oftheobtainedsamplesafterthetwo-stepsinteringreachedalmost90%ofthetheoretical density (%TD).Thesecondsetofcompactswassinteredat1400 °C for30mininair.Thesampleswithout open porositywerepost-sinteredbytheHIPat1200 °C for2hinanargonatmosphereatapressureof 200MPa.Thedensitysignificantly increasedupto96%TD.Thedifferencesbetweensamplespreparedby these twotechniqueswerealsoanalyzedbyXRDandSEM.Thelatticevibrationspectrawereobtained using Ramanspectroscopyandtheyindicateahighdegreeoflatticedisorder,aswellashighvaluesof the oxygenvacancyconcentration.Electricalcharacteristicwereestablishedinthefrequencyrangefrom 10kHzto10GHz.Thechoiceoftheprocessingroutehadconsiderableinfluence onstructuraland physicalpropertiesofMgTiO3 ceramics.

Anglický abstrakt

The aim of this study is to explore the influence of the processing route on the structural and physical properties of bulk MgTiO3 ceramics. Commercially available MgO and TiO2 powders were mechanically activated in aplanetary ball mill. Green bodies were formed by an isostatic pressure of 300MPa. The sintering of these samples was done either by theTwo-Step Sintering (TSS) approach or by conventional pressure less sintering followed by Hot Isostatic Pressing (post-HIPing). The first set of compacts was sintered by TSS in air at 1300 °C for 30 min and the next step was performed at 1200 °C for 20h. The density oftheobtainedsamplesafterthetwo-stepsinteringreachedalmost90%ofthetheoretical density (%TD).Thesecondsetofcompactswassinteredat1400 °C for30mininair.Thesampleswithout open porositywerepost-sinteredbytheHIPat1200 °C for2hinanargonatmosphereatapressureof 200MPa.Thedensitysignificantly increasedupto96%TD.Thedifferencesbetweensamplespreparedby these twotechniqueswerealsoanalyzedbyXRDandSEM.Thelatticevibrationspectrawereobtained using Ramanspectroscopyandtheyindicateahighdegreeoflatticedisorder,aswellashighvaluesof the oxygenvacancyconcentration.Electricalcharacteristicwereestablishedinthefrequencyrangefrom 10kHzto10GHz.Thechoiceoftheprocessingroutehadconsiderableinfluence onstructuraland physicalpropertiesofMgTiO3 ceramics.

Dokumenty

BibTex


@article{BUT124180,
  author="Suzana {Filipović} and Nina {Obradović} and Vladimir B. {Pavlović} and Miodrag {Mitrić} and Aleksandar {Dordevic} and Martin {Kachlík} and Karel {Maca}",
  title="Effect of consolidation parameters on structural, microstructural and electrical properties of magnesium titanate ceramics",
  annote="The aim of this study is to explore the influence of the processing route on the structural and physical
properties of bulk MgTiO3 ceramics. Commercially available MgO and TiO2 powders were mechanically
activated in aplanetary ball mill.  Green bodies were formed by an isostatic pressure of 300MPa. The
sintering of these samples was done either by  theTwo-Step Sintering (TSS) approach or by conventional
pressure less sintering followed by Hot Isostatic Pressing (post-HIPing). The first set of compacts was
sintered by TSS in air at 1300 °C for 30 min and the next step was performed at 1200 °C for 20h. The
density oftheobtainedsamplesafterthetwo-stepsinteringreachedalmost90%ofthetheoretical
density (%TD).Thesecondsetofcompactswassinteredat1400 °C for30mininair.Thesampleswithout
open porositywerepost-sinteredbytheHIPat1200 °C for2hinanargonatmosphereatapressureof
200MPa.Thedensitysignificantly increasedupto96%TD.Thedifferencesbetweensamplespreparedby
these twotechniqueswerealsoanalyzedbyXRDandSEM.Thelatticevibrationspectrawereobtained
using Ramanspectroscopyandtheyindicateahighdegreeoflatticedisorder,aswellashighvaluesof
the oxygenvacancyconcentration.Electricalcharacteristicwereestablishedinthefrequencyrangefrom
10kHzto10GHz.Thechoiceoftheprocessingroutehadconsiderableinfluence onstructuraland
physicalpropertiesofMgTiO3 ceramics.",
  chapter="124180",
  doi="10.1016/j.ceramint.2016.03.088",
  howpublished="print",
  number="8",
  volume="42",
  year="2016",
  month="june",
  pages="9887--9898",
  type="journal article in Web of Science"
}