SIMULATION OF DEFORMATION AND FRACTURE OF GRAPHENE: EFFECT OF SIZE, DEFECTS AND SURFACE MODIFICATION
Article
Physical Mesomechanics.
Springer New York LLC.
Vol. 13.
2010.
P. 329-336
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
Publisher
IAPC Nauka/Interperiodica
Number of issue
6
Language
English
Pages
866-875
Status
Published
Link
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
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Other records
High Energy Chemistry.
Maik Nauka-Interperiodica Publishing.
Vol. 43.
2010.
P. 628-633