Liquid phase sintering of yttrium oxide: The effect of Al2O3 and SiO2 additives

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F24%3APU155517" target="_blank" >RIV/00216305:26620/24:PU155517 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0955221923006817?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0955221923006817?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jeurceramsoc.2023.08.055" target="_blank" >10.1016/j.jeurceramsoc.2023.08.055</a>

Result language
angličtina
Original language name
Liquid phase sintering of yttrium oxide: The effect of Al2O3 and SiO2 additives
Original language description
Solid-state sintering of Y2O3 is difficult and requires high-temperature heat treatment or the use of a sintering additive. In this study, liquid-phase sintering was utilized to produce dense Y2O3 bodies with fine-grained microstructure. Al2O3 and SiO2 were added to a commercial nano-Y2O3 powder using aluminum nitrate and tetraethylorthosilicate (TEOS) as the precursors; the samples were uniaxially pressed at 100 MPa and sintered at 1500 degrees C and 1650 degrees C. The addition of the sintering aids increased the relative density of the samples sintered at lower temperatures; also, the sintering aids suppressed grain growth. The dissolution of Y2O3 into the liquid phase changes the solid-liquid interfacial energy resulting in the formation of isolated yttrium-silicate/yttriumaluminate grains and accounts for the suppression of the growth of yttria grains.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
20504 - Ceramics

Project
<a href="/en/project/GA20-14237S" target="_blank" >GA20-14237S: Microstructure and functional properties refinement by dopant distribution in transparent ceramics – combined experimental and theoretical approach</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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