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

Authors

  • Jonathan Meza Galvez Posgrado en Ciencia de Materiales, UAEMex
  • Oscar Olea Mejía Centro Conjunto en Química Sustentable UAEM-UNAM
  • Susana Hernández López UNIVERSIDAD AUTÓNOMA DEL ESTADO DE MÉXICO
  • Enrique Vigueras Santiago UNIVERSIDAD AUTÓNOMA DEL ESTADO DE MÉXICO
  • Marco Antonio Camacho López UNIVERSIDAD AUTÓNOMA DEL ESTADO DE MÉXICO

DOI:

https://doi.org/10.47566/2018_syv31_1-030044

Keywords:

Zirconium hydroxide, Tetragonal Zirconia, Isothermal treatment, Raman spectroscopy

Abstract

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.

Author Biographies

  • Jonathan Meza Galvez, Posgrado en Ciencia de Materiales, UAEMex
    Posgrado en Ciencia de Materiales, UAEMex
  • Oscar Olea Mejía, Centro Conjunto en Química Sustentable UAEM-UNAM
    nanotecnología
  • Susana Hernández López, UNIVERSIDAD AUTÓNOMA DEL ESTADO DE MÉXICO
    CIENCIA DE MATERIALES
  • Enrique Vigueras Santiago, UNIVERSIDAD AUTÓNOMA DEL ESTADO DE MÉXICO
    CIENCIA DE MATERIALES
  • Marco Antonio Camacho López, UNIVERSIDAD AUTÓNOMA DEL ESTADO DE MÉXICO
    CIENCIA DE MATERIALES

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Published

2018-09-15

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Section

Research Papers

How to Cite

Amorphous Zr(OH)4 to t-ZrO2 transformed isothermally. (2018). Superficies Y Vacío, 31(3), 44-47. https://doi.org/10.47566/2018_syv31_1-030044