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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Electric field-assisted synthesis/sintering cerium oxide: 5 wt.% gadolinium oxide

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Author(s):
Porfirio, T. C. [1] ; Muccillo, E. N. S. [1] ; Muccillo, R. [1]
Total Authors: 3
Affiliation:
[1] Energy & Nucl Res Inst IPEN, Ctr Sci & Technol Mat CCTM, Travessa R 400, Cidade Univ, BR-05508170 Sao Paulo, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Journal of the European Ceramic Society; v. 41, n. 14, p. 7105-7110, NOV 2021.
Web of Science Citations: 0
Abstract

Gadolinium oxide ceramic powders were mixed to cerium oxide ceramic powders, pressed to pellets, and sintered either at 1450 degrees C or applying 200 V cm(-1) electric field at 800 degrees C, 900 degrees C and 1000 degrees C. The structural phases and the microstructure of the sintered pellets were analyzed by X-ray diffraction and scanning electron microscopy, respectively. The formation of substitutional solid solution was followed by monitoring the increase of the electrical conductivity by impedance spectroscopy and X-ray diffraction. The main results show that Joule heating due to the flow through the pellets of the electric current, which was produced by the application of the electric field, allows for promoting partial solid solution as well as partial sintering the ceria-gadolinia pellets. Moreover, grain growth that occurred in the high temperature sintered pellets was inhibited in the electric field-assisted synthesized/sintered pellets, being an alternative technique for producing cerium oxide-gadolinium oxide solid solutions. (AU)

FAPESP's process: 17/11937-4 - A sustainable path to methane conversion by advanced electrochemical technologies
Grantee:Fabio Coral Fonseca
Support Opportunities: Research Grants - Research Centers in Engineering Program