Transformation-assisted consolidation of Y2O3:Eu3+ nanospheres as a concept to optical nanograined ceramics / Yavetskiy R. P.,Baumer V. N.,Danylenko M. I.,Doroshenko A. G.,Ogorodnikov I. N.,Petrusha I. A.,Tolmachev A. V.,Turkevich V. Z. // CERAMICS INTERNATIONAL. - 2014. - V. 40, l. 2. - P. 3561-3569.

ISSN/EISSN:

0272-8842 / 1873-3956

Type:

Article

Abstract:

A concept is proposed to produce Y2O3:Eu3+ optical nanograined ceramics by the transformation-assisted consolidation of nanospheres under 8 GPa pressure. The nanoceramics were prepared by high-pressure low-temperature sintering (similar to 0.04-0.2T(m) where T-m is the melting temperature) accompanied by the cubic-to-monoclinic phase transition. The effects of sintering conditions upon phase composition, grain size evolution, density, morphology, optical and luminescent properties of sintered ceramics have been studied. It has been shown that Y2O3:Eu3+ nanograined ceramics consisting of individual (cubic or monoclinic) phases or their mixture can be obtained by variation of the sintering temperature. The use of transformation-assisted consolidation makes it possible to prepare Y2O3:Eu3+ nanoceramics with average grain size three times smaller (12 nm) than that of the starting nanopowders (37 nm), which corresponds to extremely low grain growth factor of 0.3. The grain size refinement is related to numerous nucleation events in the parent phase of cubic yttrium oxide. The preparation conditions of translucent (T=50\%) composite Y2O3:Eu3+ nanograined ceramics with a relative density of 99 +/- 1 \% have been determined. The obtained two-phase ceramics show high optical transparency due to negligible birefringence at extremely small (similar to 12 nm) average grain size. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

Author keywords:

Sintering; Grain size; Optical properties; Y2O3; Transformation-assisted consolidation BULK NANOCRYSTALLINE TIO2; HIGH-PRESSURE; YTTRIUM-OXIDE; GRAIN-SIZE; PHASE-TRANSFORMATION; DENSIFICATION; NANOSCALE; LASER; SPECTROSCOPY; TRANSITIONS

DOI:

10.1016/j.ceramint.2013.09.072

Web of Science ID:

ISI:000329882100127

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	MAR
Publisher	ELSEVIER SCI LTD
Address	THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
Language	English
EISSN	1873-3956
Keywords-Plus	BULK NANOCRYSTALLINE TIO2; HIGH-PRESSURE; YTTRIUM-OXIDE; GRAIN-SIZE; PHASE-TRANSFORMATION; DENSIFICATION; NANOSCALE; LASER; SPECTROSCOPY; TRANSITIONS
Research-Areas	Materials Science
Web-of-Science-Categories	Materials Science, Ceramics
Author-Email	yavetskiy@isc.kharkov.ua
ResearcherID-Numbers	Yavetskiy, Roman/J-4323-2015 Turkevich, Vladimir/E-5856-2011 Ogorodnikov, Igor/B-4162-2011
ORCID-Numbers	Ogorodnikov, Igor/0000-0002-4700-2340 Turkevich, Vladimir/0000-0002-1441-4269 Doroshenko, Andrey/0000-0002-3800-2488 Yavetskiy, Roman/0000-0003-4260-5481
Funding-Acknowledgement	Target Complex Program of Fundamental Research of NAS of Ukraine ``Fundamental problems of Nanostructured Systems, Nanomaterials and Nanotechnologies{''} {[}78/13-N]
Funding-Text	The authors are grateful for Yu.I. Pazura for peparation of starting nanopowders, O.M. Vovk and A.V. Ragulya for their help in characterization of powder samples and for V.A. Pustovarov for the help in VUV spectroscopy measurements. Authors from ISC, Kharkov, acknowledge support from Target Complex Program of Fundamental Research of NAS of Ukraine ``Fundamental problems of Nanostructured Systems, Nanomaterials and Nanotechnologies{''} under the Project \#78/13-N.
Number-of-Cited-References	47
Usage-Count-Since-2013	25
Journal-ISO	Ceram. Int.
Doc-Delivery-Number	292DJ