Effect of synthesis atmosphere on the proton conductivity of Y-doped barium zirconate solid electrolytes

Autor(es)

Goncalves, M. D. ; Maram, Pardha S. ; Navrotsky, A. ; Muccillo, R.

• Tipo de documento: Artigo Científico
• Fonte: CERAMICS INTERNATIONAL; v. 42, n. 12, p. 13689-13696, SEP 2016.
• Citações Web of Science: 5

Resumo

Yttrium-doped barium zirconate ceramic powders were synthesized by the oxidant peroxide method in air and under controlled atmosphere of nitrogen inside a glove box. The powders were characterized by thermogravimetry, X-ray diffraction, scanning electron microscopy and transmission electron microscopy. After uniaxial cold isostatic pressing, green pellets were sintered at 1600 degrees C for 4 h. The electrical conductivity behavior was accessed by electrochemical impedance spectroscopy. The results show that specimens synthesized under controlled atmosphere achieved higher electrical conductivity, two orders of magnitude higher than specimens prepared in laboratory air. The enhancement in electrochemical properties and increase in sintering ability is attributed to the less carbonate contamination as a result lower grain boundary density in the samples prepared under controlled atmosphere. (C) 2016 Elsevier Ltd and Techna Group S.r.l. 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
• Processo FAPESP: 13/10928-0 - Medidas calorimétricas de entalpias de superfície e de interfaces em zirconato de bário dopado com ítrio
• Beneficiário: Mayra Dancini Gonçalves
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• Processo FAPESP: 11/50197-0 - Caracterizacao de zirconato de bario dopado com itrio, sintetizado pelo metodo dos peroxidos oxidantes.
• Beneficiário: Mayra Dancini Gonçalves
• Modalidade de apoio: Bolsas no Brasil - Doutorado