Effect of Precipitation pH and Heat Treatment on the Properties of Hydrous Zirconium Dioxide

Autor:	A. B. Yaroslavtsev, G. I. Kapustin, E. Yu. Voropaeva, A. G. Veresov, Irina A. Stenina
Rok vydání:	2008
Předmět:	Zirconium dioxide Precipitation (chemistry) Chemistry Materials Science (miscellaneous) Thermal decomposition Inorganic chemistry Crystal structure Inorganic Chemistry chemistry.chemical_compound Ammonia Nitrate Ammonium Cubic zirconia Physical and Theoretical Chemistry
Zdroj:	Russian Journal of Inorganic Chemistry. 53:350-356
ISSN:	1531-8613 0036-0236
Popis:	The effect of the precipitation pH and subsequent heat treatment is studied on the properties of hydrous zirconium dioxide precipitated by ammonia from nitrate solutions. Precipitation at pH ≤ 6 generates hydrous zirconium dioxide, which contains excess sorbate nitrate ions; the product precipitated at pH ≥ 7 contains excess ammonium ions. This distinction considerably affects the course of thermolysis and the morphology of products. The exotherm associated with the formation of the crystal structure of zirconia becomes more pronounced with rising precipitation pH. In addition, the samples prepared at pH ≥ 7 have a more developed surface. The morphologic and microstructural evolution of hydrous zirconium dioxide samples during thermolysis is described.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ef694c615748d9738a2507f184315689 https://doi.org/10.1134/s0036023608030029 Zobrazit plný text záznamu Full text from SpringerLink