Electric field-assisted pressureless sintering gadolinium-, yttrium- and samarium-doped barium cerate

Autor(es)

Muccillo, R. ^{[1, 2]} ; Esposito, V ^[3] ; de Florio, D. Z. ^[1] ; Muccillo, E. N. S. ^[2]

Afiliação do(s) autor(es)

^[1] Fed Univ ABC, Ctr Engn Modeling & Appl Social Sci, BR-09210580 Santo Andre, SP - Brazil

^[2] Energy & Nucl Res Inst, Ctr Sci & Technol Mat, BR-05508170 Sao Paulo, SP - Brazil

^[3] Tech Univ Denmark, Dept Energy Convers & Storage, DK-4000 Roskilde - Denmark

• Tipo de documento: Artigo Científico
• Fonte: SCRIPTA MATERIALIA; v. 156, p. 6-9, NOV 2018.
• Citações Web of Science: 1

Resumo

Gadolinium-, yttrium- and samarium-doped barium cerate compounds were sintered either conventionally at 1500 degrees C or applying an electric field at 1200 degrees C. The combined results of dilatometry and impedance spectroscopy measurements in electric field-assisted sintered specimens show substantial improvement of the electrical conductivity. Improved grain-to-grain contact and the thermal removal of depleted chemical species due to Joule heating at the space charge region are proposed as the main mechanisms for the increase of both the grain boundary and the bulk electrical conductivities, respectively. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs