Amorphous Zr(OH)4 to t-ZrO2 transformed isothermally

Superficies y Vacío

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Field Value
 
Title Amorphous Zr(OH)4 to t-ZrO2 transformed isothermally
 
Creator Meza Galvez, Jonathan
Olea Mejía, Oscar
Hernández López, Susana
Vigueras Santiago, Enrique
Camacho López, Marco Antonio
 
Subject Zirconium hydroxide; Tetragonal Zirconia; Isothermal treatment; Raman spectroscopy
 
Description With the aim to study the transformation from the commercially amorphous Zr(OH)4 to the t-ZrO2, phase, the starting material was isothermally treated in a calorimeter at 350, 365, 370, 375 and 380 o C. The TGA coupled to the DSC technique was used to determine with high precision both the temperature and time necessary to achieve the amorphous Zr(OH)4 to  t-ZrO2 transformation. The mass loss and heat flow, as a function of time, were monitored to study the dehydroxylation of Zr(OH)4 and the crystallization processes, respectively. Raman spectroscopy was used to obtain evidence of the t-ZrO2 formation. The DSC results show an exothermic peak (typical of amorphous-crystalline transitions) related to the formation of t-ZrO2. Our results indicate that the time necessary to obtain the t-ZrO2 phase shortens when temperature increases.
 
Publisher Sociedad Mexicana de Ciencia y Tecnología de Superficies y Materiales A.C.
 
Contributor CONACYT
 
Date 2018-09-15
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion

Original Research
 
Format application/pdf
 
Identifier http://smctsm.org.mx/ojs/index.php/SyV/article/view/245
 
Source Superficies y Vacío; Vol 31, No 3 (2018); 44-47
Superficies y Vacío; Vol 31, No 3 (2018); 44-47
1665-3521
 
Language eng
 
Relation http://smctsm.org.mx/ojs/index.php/SyV/article/view/245/178
 
Rights Copyright (c) 2018 The authors; licensee SMCTSM
http://creativecommons.org/licenses/by/4.0
 

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