About: Solvothermal synthesis of nanocrystalline KTaO3 : Effect of solvent dielectric constant

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	A set of KTaO3 nanopowders has been prepared at T = 180 oC using various aliphatic alcohols and water as solvents. Pronounced connection between the solvent type and potassium tantalate structures was found. Structural X-ray, TEM and Raman scattering experiments have shown that the solvent dielectric constant ε is an important critical parameter. At ε 24 the cubic perovskite-type phase was formed.Mixed perovskite and pyrochlore phases were formed at larger values of ε. Only pure pyrochlore phase is realized when ε 80. Pyrochlore-free perovskite-structure nanopowder phase formation with the particle size of 18 and 28 nm was achieved when ethanol and isopropanol solvents were used. Under annealing the coherent domain size decreased down to 6 and 18 nm respectively, since the amorphous phase crystallized. Crystallinity of both as-prepared and annealed powder is the best when isopropanol solvent is used. A set of KTaO3 nanopowders has been prepared at T = 180 oC using various aliphatic alcohols and water as solvents. Pronounced connection between the solvent type and potassium tantalate structures was found. Structural X-ray, TEM and Raman scattering experiments have shown that the solvent dielectric constant ε is an important critical parameter. At ε 24 the cubic perovskite-type phase was formed.Mixed perovskite and pyrochlore phases were formed at larger values of ε. Only pure pyrochlore phase is realized when ε 80. Pyrochlore-free perovskite-structure nanopowder phase formation with the particle size of 18 and 28 nm was achieved when ethanol and isopropanol solvents were used. Under annealing the coherent domain size decreased down to 6 and 18 nm respectively, since the amorphous phase crystallized. Crystallinity of both as-prepared and annealed powder is the best when isopropanol solvent is used. (en)
Title	Solvothermal synthesis of nanocrystalline KTaO3 : Effect of solvent dielectric constant Solvothermal synthesis of nanocrystalline KTaO3 : Effect of solvent dielectric constant (en)
skos:prefLabel	Solvothermal synthesis of nanocrystalline KTaO3 : Effect of solvent dielectric constant Solvothermal synthesis of nanocrystalline KTaO3 : Effect of solvent dielectric constant (en)
skos:notation	RIV/68378271:_____/12:00378643!RIV13-GA0-68378271
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GAP108/12/1941), P(KAN301370701), Z(AV0Z10100520), Z(AV0Z10100522)
http://linked.open...iv/cisloPeriodika	7
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Trepakov, Vladimír Drahokoupil, Jan Jastrabík, Lubomír Bykov, Pavlo Dlabáček, Zdeněk Makarova, Marina Čerňanský, Marian Dejneka, Alexandr
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Fyzikální ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	169172
http://linked.open...ai/riv/idVysledku	RIV/68378271:_____/12:00378643
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	nanostructures; chemical synthesis; Raman spectroscopy; X-ray diffraction (en)
http://linked.open.../riv/klicoveSlovo	Raman spectroscopy X-ray diffraction nanostructures chemical synthesis
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[AAC56CA20F8A]
http://linked.open...i/riv/nazevZdroje	Materials Research Bulletin
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	8 (xsd:int)
http://linked.open...cetTvurcuVysledku	8 (xsd:int)
http://linked.open...vavai/riv/projekt	Nanostructured Macroscopic Systems - Technology and Characterisation Advanced preparation methods and experimental research of doped perovskite thin-film systems for high density energy storages
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	47
http://linked.open...iv/tvurceVysledku	Dejneka, Alexandr Drahokoupil, Jan Jastrabík, Lubomír Trepakov, Vladimír Bykov, Pavlo Dlabáček, Zdeněk Makarova, Marina Čerňanský, Marian
http://linked.open...ain/vavai/riv/wos	000305112000027
http://linked.open...n/vavai/riv/zamer	Specific effects in condensed systems with reduced dimension and broken symmetry Wave and Corpuscular Light Propagation, Optical Materials and Technology
issn	0025-5408
number of pages	6 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.materresbull.2012.03.028

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