High-density nanoparticle ceramic bodies

Journal of Thermal Analysis and Calorimetry Volume: 111 Issue: 2 Pages: 1351-1355 Published: 2013

(a) Image of SEM-FEG green body isostatic pressed and (b) sinterized of 1,450 ºC/3 h with 10 C min-1

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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 rate was taken as a key parameter and two competing sinterization processes were identified, associated with different diffusional mechanisms. Using heating rates of 113 °C min−1, a high-final density (98 % of the theoretical) was obtained by superposing the two aforementioned mechanisms, resulting in a homogeneous microstructure at lower temperatures.

Robson Lima
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