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

Superficies y Vacío

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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.
Date 2018-09-15
Type info:eu-repo/semantics/article
Original Research
Format application/pdf
Source Superficies y Vacío; Vol. 31 No. 3 (2018); 44-47
Superficies y Vacío; Vol. 31 Núm. 3 (2018); 44-47
Language eng
Rights Copyright (c) 2018 The authors; licensee SMCTSM

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