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Type: Artigo
Title: The Effect Of Co And Zn Addition On Densification And Electrical Properties Of Ceria-based Nanopowders
Author: Villas-Boas
Lucia Adriana; de Paula Nascente
Pedro Augusto; Landers
Richard; Campos
Marcelo; Pinatti Ferreira de Souza
Dulcina Maria
Abstract: In this work, cobalt and zinc-doped Ce0.8Gd0.2O1.9 samples were prepared starting from a commercial nanopowder and compared to the undoped material. The powder samples were pressed and afterwards sintered by a two-step procedure, before characterization by X-Ray Diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and Impedance Spectroscopy (IS) in air. Cobalt or zinc additions are effective as sintering aid, allowing peak sintering temperatures around 1000 degrees C to reach densifications above of 93% of theoretical density, showing no evidence for the presence of secondary phases. The total conductivity at 800 degrees C of pressed Zn-doped samples (6.7x10(-2) S/cm) and Co-doped samples (7.5x10(-2) S/cm) is similar for undoped samples (7.2x10(-2) S/cm) showing that Zn and Co has a positive effect on densification without compromising the electrical conductivity.
Subject: Gadolinium-doped Ceria
Cobalt Addition
Zinc Addition
Editor: Universidade Federal de Sao Carlos, Dept Engenharia Materials
São Carlos
Citation: Materials Research-ibero-american Journal Of Materials. Universidade Federal De Sao Carlos, Dept Engenharia Materials, v. 19, p. 1057 - 1063, 2016.
Rights: aberto
Identifier DOI: 10.1590/1980-5373-MR-2015-0643
Date Issue: 2016
Appears in Collections:Unicamp - Artigos e Outros Documentos

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