On the structure and dehydration of hydrous zirconia and hafnia xerogels

Hydrous zirconia and hafnia xerogels of compositions ZrO2 · 2.5H2O and HfO2 · 2.3H2O are dehydrated in two steps upon heating. First, molecular water is mostly removed from the structures to form phases of compositions ZrO2 · H2O and HfO2 · 0.5H2O. Second, polycondensation of OH groups occurs. Both processes are easier for ZrO2 · 2.5H 2O. Apart from these steps, the interaction of water molecules with zirconium-oxygen bridges was found to occur during dehydration of the zirconium compound. The composition of HfO2 · 0.5H2O should actually read as Hf4O7(H2O)(OH)2. © Pleiades Publishing, Ltd., 2010.

Authors
Kostrikin A.V. 1 , Spiridonov F.M.2 , Komissarova L.N.2 , Lin'ko I.V. 3 , Kosenkova O.V.1 , Zaitsev B.E. 3
Journal
Russian Journal of Inorganic Chemistry
Publisher
IAPC Nauka/Interperiodica
Number of issue
6
Language
English
Pages
866-875
Status
Published
Link
External link
DOI
10.1134/S0036023610060070
Volume
55
Year
2010
Organizations
  • 1 Michurinsk State Pedagogical University, Michurinsk, Russian Federation
  • 2 Moscow State University, Moscow, 119991, Russian Federation
  • 3 Russian University of Peoples Friendship, Moscow, Russian Federation
Keywords
Dehydration; Hafnium oxides; Molecules; Xerogels; Hydrous zirconia; Molecular water; OH group; Oxygen bridge; Water molecule; Zirconia
Date of creation
19.10.2018
Date of change
19.10.2018
Short link
https://repository.rudn.ru/en/records/article/record/2841/
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