Structural Characteristics and Thermophysical Properties of Complex Ceramic Oxides in the System Dy2O3–HfO2

The structure and thermophysical properties of materials formed in the system Dy2O3–HfO2 (molar ratio 1 : 3 to 3 : 1) as a result of isothermal firing of x-ray amorphous mixed hydroxides at temperature to 1600°C are investigated. It is shown that for ratios 1 : 3 to 1 : 1 the crystallization process results in the formation of single-phase solid solutions with the structure of defective fluorite and marked nonequivalence of the parameters of the local environment of the Dy and Hf atoms. It is determined that the ceramic based on dysprosium hafnate (Dy2O3: HfO2 = 1 : 1) possesses low, practically temperature independent (to 800°C), thermal conductivity about 1.4 W/(m · K). © 2016, Springer Science+Business Media New York.

Authors
Popov V.V.1 , Menushenkov A.P.1 , Zubavichus Y.V.2 , Korovin S.A.1 , Fortal’nova E.A. 3 , Kruglov A.B.1 , Kruglov V.B.1 , Kulik É.S.2 , Pisarev A.A.1
Publisher
Springer New York LLC
Number of issue
1-2
Language
English
Pages
47-52
Status
Published
Volume
73
Year
2016
Organizations
  • 1 National Nuclear Research University – Moscow Engineering Physics Institute (NIYaU MIFI), Moscow, Russian Federation
  • 2 National Research Center Kurchatov Institute, Moscow, Russian Federation
  • 3 Peoples’ Friendship University of Russia, Moscow, Russian Federation
Keywords
crystal lattice; dysprosium hafnate; fluorite; thermal conductivity
Date of creation
19.10.2018
Date of change
19.10.2018
Short link
https://repository.rudn.ru/en/records/article/record/3941/
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