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Nanostructured ZrO2 Synthesized by Using Pressurized and Supercritical Fluids — Its Structural and Microstructural Evolution and Thermal Stability.
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SYSNO ASEP 0475188 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Nanostructured ZrO2 Synthesized by Using Pressurized and Supercritical Fluids — Its Structural and Microstructural Evolution and Thermal Stability. Author(s) Matějová, Lenka (UCHP-M) RID, ORCID, SAI
Matěj, Z. (CZ)Source Title Journal of Supercritical Fluids. - : Elsevier - ISSN 0896-8446
Roč. 128, OCT 2017 (2017), s. 182-193Number of pages 12 s. Language eng - English Country NL - Netherlands Keywords zirconia ; microstructure ; crystallization Subject RIV CA - Inorganic Chemistry OECD category Inorganic and nuclear chemistry R&D Projects GA14-23274S GA ČR - Czech Science Foundation (CSF) Institutional support UCHP-M - RVO:67985858 UT WOS 000408287400024 EID SCOPUS 85020020925 DOI 10.1016/j.supflu.2017.05.029 Annotation Nanostructured ZrO2 was successfully prepared by processing by pressurized hot water and pressurized hot/supercritical methanol in a flow regime. Processing temperature and amount of used water are crucial for ZrO2 crystallization. Processing by pressurized hot or supercritical methanol improved ZrO2 purity and affected microporosity, but did not cause ZrO2 crystallization. The effect of processing pressure on ZrO2 crystallization was also proved, at 10 and 30 MPa the crystallization of zirconia was enhanced. Processing by both pressurized fluids at different conditions has significant impact on further crystallization of ZrO2 during post-thermal treatment, thus, the phase composition of ZrO2 can be tailored. While thermal treatment of nanocrystalline ZrO2 led to crystallization of bicrystalline ZrO2 mixture with major monoclinic phase, thermal treatment of amorphous ZrO2 resulted in crystallization of bicrystalline ZrO2 mixture with major tetragonal phase. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2018
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