Obtenção e caracterização de fitas cerâmicas de NiO-CDG obtidos por tape casting

Luana Barbosa da Cruz

Universidade Federal do Rio Grande do Norte (UFRN) Brasil

Hugo Plínio de Andrade Alves

Universidade Federal do Rio Grande do Norte (UFRN) Brasil

Rubens Alves Junior

Universidade Federal de Campina Grande (UFCG) Brasil

Daniel Araújo de Macedo

Universidade Federal da Paraíba (UFPB) Brasil

Wilson Acchar

ORCID iD Universidade Federal do Rio Grande do Norte (UFRN) Brasil

Resumo

Este trabalho tem como objetivo analisar as propriedades microestruturais, físicas, mecânicas e elétricas de compósitos NiO-CDG obtidos pela técnica tape casting e sinterizados em diferentes temperaturas. Os resultados revelaram que os compósitos têm fases cristalinas bem definidas de óxido de níquel (NiO) e céria dopada com gadolínio (CDG). As amostras sinterizadas a 1400 ºC apresentaram a melhor relação entre densidade relativa (98,00 %) e resistência mecânica (107,39 MPa). Além disso, amostras a verde mostraram uma resposta elétrica semelhante às sinterizadas, tornando-as excelentes candidatas para aplicações como materiais precursores de ânodos para células a combustível de óxido sólido (SOFCs).

Palavras-chave


Céria dopada com gadolínio; Óxido de níquel; Compósitos; Tape casting


Texto completo:

Referências


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DOI: http://dx.doi.org/10.18265/1517-0306a2021id4888

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