On the structure and dehydration of hydrous zirconia and hafnia xerogels

Autor:	A. V. Kostrikin, F. M. Spiridonov, B. E. Zaitsev, O. V. Kosenkova, L. N. Komissarova, I. V. Lin’ko
Rok vydání:	2010
Předmět:	Zirconium Condensation polymer biology Materials Science (miscellaneous) Inorganic chemistry chemistry.chemical_element medicine.disease Hafnia biology.organism_classification Inorganic Chemistry chemistry medicine Molecule Cubic zirconia Dehydration Physical and Theoretical Chemistry
Zdroj:	Russian Journal of Inorganic Chemistry. 55:866-875
ISSN:	1531-8613 0036-0236
DOI:	10.1134/s0036023610060070
Popis:	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 · 2.5H2O. 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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0664dfdc3e6d0f520aa140becf20f270 https://doi.org/10.1134/s0036023610060070 Zobrazit plný text záznamu Full text from SpringerLink