Artigo

Dilatometry analysis of the sintering process of nanostructured gadolinia-doped ceria

Writers: R. M. Batista; E. N. S. Muccillo Keywords: TG; DRX; Ceria; Dilatometry; Sintering Abstract: The sintering process of compacts of nanostructured gadolinia-doped ceria was investigated by dilatometry and by construction of the master sintering curve. Corrections for the thermal expansion of the experimental setup and mass […]

Artigo

Influence of spark plasma consolidation conditions on the superconducting properties of (Bi,Pb)-Sr-Ca-Cu-O ceramic samples

Writers: F. Rosales-Saiz and L. Pérez-Acosta and I.F. Machado and J.E. Pérez-Fernández and R.F. Jardim and E. Govea-Alcaide Keywords: Bi-based superconductor; Spark plasma sintering; Finite element method; Superconducting properties Abstract: The influence of different plungers/die materials for the […]

Artigo

The spatial distribution of temperature and oxygen deficiency in spark-plasma sintered superconducting Bi-based materials

16 de dezembro de 2014 Rose Portasio 0

Writers: E. Govea-Alcaidea, J.E. Pérez-Fernándeza, I.F. Machadob, R.F. Jardimc, Keywords: Bi-based superconductor; Granular material; Spark-plasma sintering; Finite element method; Transport properties Abstract: Pre-reacted powders of (Bi–Pb)2Sr2Ca2Cu3O10+δ (Bi-2223) were consolidated by using the spark plasma sintering (SPS) technique […]

Artigo

Electric field-assisted flash sintering of Tin dioxide

18 de novembro de 2013 Rose Portasio 0

Writers: Reginaldo Muccillo, Eliana N.S. Muccillo  Keywords: Flash sintering; Tin dioxide Abstract: SnO2 green pellets were submitted to ac electric fields at temperatures below 1350 ◦C. Electric current pulses occurred and a substantial modification wasfound in the […]

Artigo

High-density nanoparticle ceramic bodies

26 de julho de 2013 Robson Lima 0

Writers: Mario J. Godinho; Caue Ribeiro; Rosana F. Gonçalves; Elson Longo; Edson R. Leite Keywords: Sintering; Nanocrystalline materials; Powder consolidation; Sol–gel; Fuel cell materials Abstract: An investigation on the sinterization of Gd:CeO2 (Ce0.85Gd0.15O1.9−δ ceramic system) 3–10 nm nanoparticles in pressed bodies was done. The heating […]