Defects in Zirconia Nanomaterials Doped with Rare-Earth Oxides

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F14%3A10288510" target="_blank" >RIV/00216208:11320/14:10288510 - isvavai.cz</a>

Výsledek na webu

<a href="http://przyrbwn.icm.edu.pl/APP/PDF/125/a125z3p21.pdf" target="_blank" >http://przyrbwn.icm.edu.pl/APP/PDF/125/a125z3p21.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.12693/APhysPolA.125.760" target="_blank" >10.12693/APhysPolA.125.760</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Defects in Zirconia Nanomaterials Doped with Rare-Earth Oxides

Popis výsledku v původním jazyce

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 techniqueand 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 a

Název v anglickém jazyce

Defects in Zirconia Nanomaterials Doped with Rare-Earth Oxides

Popis výsledku anglicky

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 techniqueand 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 a

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

<a href="/cs/project/GAP108%2F11%2F1396" target="_blank" >GAP108/11/1396: Vliv substitučních příměsí a hranic zrn na vlastnosti nanokrystalických materiálů na bázi oxidu zirkonu</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Acta Physica Polonica A

ISSN

0587-4246

e-ISSN

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Svazek periodika

125

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

PL - Polská republika

Počet stran výsledku

4

Strana od-do

760-763

Kód UT WoS článku

000339826300022

EID výsledku v databázi Scopus

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