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Statements

Subject Item
n2:RIV%2F00216208%3A11320%2F14%3A10288510%21RIV15-MSM-11320___
rdf:type
skos:Concept n19:Vysledek
rdfs:seeAlso
http://przyrbwn.icm.edu.pl/APP/PDF/125/a125z3p21.pdf
dcterms:description
Positron lifetime and coincidence Doppler broadening measurements on ZrO2+3 mol.% RE2O3 (RE = Eu, Gd, Lu) nanopowders and ceramics obtained by sintering these nanopowders are reported. The initial nanopowders were prepared by a co-precipitation technique and exhibited a mean particle size of approximate to 15 nm. The nanopowders were calcined and pressure-compacted. All compacted nanopowders exhibited the prevailing tetragonal phase with at most 15% of the monoclinic admixture. Positrons in compacted nanopowders were found to annihilate almost exclusively at grain boundaries: (i) vacancy-like misfit defects along grain boundaries and (ii) larger defects situated at intersections of grain boundaries (triple points). In nanopowders, a small portion of positrons formed positronium in pores between crystallites. Sintering of nanopowders at 1500 degrees C caused a substantial grain growth and formation of ceramics. Sintering-induced grain growth led to a disappearance of the triple points and pores. The ceramics containing Eu and Gd dopants consist of mixture of the monoclinic and the tetragonal phase, while the ceramics with Lu dopant exhibits almost exclusively the tetragonal phase. Positron lifetime and coincidence Doppler broadening measurements on ZrO2+3 mol.% RE2O3 (RE = Eu, Gd, Lu) nanopowders and ceramics obtained by sintering these nanopowders are reported. The initial nanopowders were prepared by a co-precipitation technique and exhibited a mean particle size of approximate to 15 nm. The nanopowders were calcined and pressure-compacted. All compacted nanopowders exhibited the prevailing tetragonal phase with at most 15% of the monoclinic admixture. Positrons in compacted nanopowders were found to annihilate almost exclusively at grain boundaries: (i) vacancy-like misfit defects along grain boundaries and (ii) larger defects situated at intersections of grain boundaries (triple points). In nanopowders, a small portion of positrons formed positronium in pores between crystallites. Sintering of nanopowders at 1500 degrees C caused a substantial grain growth and formation of ceramics. Sintering-induced grain growth led to a disappearance of the triple points and pores. The ceramics containing Eu and Gd dopants consist of mixture of the monoclinic and the tetragonal phase, while the ceramics with Lu dopant exhibits almost exclusively the tetragonal phase.
dcterms:title
Defects in Zirconia Nanomaterials Doped with Rare-Earth Oxides Defects in Zirconia Nanomaterials Doped with Rare-Earth Oxides
skos:prefLabel
Defects in Zirconia Nanomaterials Doped with Rare-Earth Oxides Defects in Zirconia Nanomaterials Doped with Rare-Earth Oxides
skos:notation
RIV/00216208:11320/14:10288510!RIV15-MSM-11320___
n3:aktivita
n12:P n12:I
n3:aktivity
I, P(GAP108/11/1396)
n3:cisloPeriodika
3
n3:dodaniDat
n4:2015
n3:domaciTvurceVysledku
n9:5586992 n9:9949097 n9:7037945
n3:druhVysledku
n16:J
n3:duvernostUdaju
n10:S
n3:entitaPredkladatele
n20:predkladatel
n3:idSjednocenehoVysledku
10003
n3:idVysledku
RIV/00216208:11320/14:10288510
n3:jazykVysledku
n15:eng
n3:klicovaSlova
positron-lifetime; annihilation lifetime; yttria-stabilized zirconia
n3:klicoveSlovo
n8:yttria-stabilized%20zirconia n8:annihilation%20lifetime n8:positron-lifetime
n3:kodStatuVydavatele
PL - Polská republika
n3:kontrolniKodProRIV
[ACA8F94464B1]
n3:nazevZdroje
Acta Physica Polonica A
n3:obor
n13:BM
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
5
n3:projekt
n7:GAP108%2F11%2F1396
n3:rokUplatneniVysledku
n4:2014
n3:svazekPeriodika
125
n3:tvurceVysledku
Danilenko, I. A. Melikhova, Oksana Čížek, Jakub Procházka, Ivan Konstantinova, T. E.
n3:wos
000339826300022
s:issn
0587-4246
s:numberOfPages
4
n18:doi
10.12693/APhysPolA.125.760
n14:organizacniJednotka
11320