Publication:
Nanocrystalline Powders of Dysprosium Hafnate and Ceramics on Their Basis

Дата
2019
Авторы
Petrunin, V. F.
Korovin, S. A.
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Организационные подразделения
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© 2019, Pleiades Publishing, Inc.Abstract: Chemical deposition from salt solutions (co-deposition) has been chosen and investigated as a method for synthesizing dysprosium hafnate complex oxide Dy2HfO5. Regimes for synthesis of low-aggregated single-phase Dy2HfO5 nanocrystalline powders using a microwave furnace have been developed. It is shown that the synthesized Dy2HfO5 powders subjected to high-energy grinding and mechanical activation consist of crystallites with a size of no larger than 10 nm and a specific surface of no smaller than10 m2/g. High-density ceramics has been prepared by uniaxial compacting of mechanically activated nanocrystalline powders with subsequent isothermal annealing of the compacts. Test batches of the Dy2HfO5 pellets with a density ranging from 8.25 to 9.10 g/cm3, a thermal conductivity varying from 1.21 to 1.63 W/(m K), a thermal expansion coefficient in the range from 7.1 to 8.7 × 10–6 K–1, and Young’s modulus in the range from 168 to 221 GPa have been fabricated and certified.
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Petrunin, V. F. Nanocrystalline Powders of Dysprosium Hafnate and Ceramics on Their Basis / Petrunin, V.F., Korovin, S.A. // Crystallography Reports. - 2019. - 64. - № 2. - P. 342-347. - 10.1134/S1063774519020214
URI
https://www.doi.org/10.1134/S1063774519020214
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85066146311&origin=resultslist
 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000468947500027
 https://openrepository.mephi.ru/handle/123456789/18079
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