Abstract
Nanocrystalline tetragonal zirconia is commercially very significant material which finds extensive use as an anode material in SOFCs, as a catalyst oxygen sensor and structural material. Nanocrystalline zirconia powders for high performance anode of SOFCs have been synthesized by co-precipitation route. This technique is very helpful for the promotion of the stabilization of tetragonal phase of ZrO<SUB>2</SUB> in nano level at moderate temperature. The main objective of this paper is to stabilize the t-ZrO<SUB>2</SUB> through precipitation route using NH<SUB>4</SUB>OH solution. The processing features and the microstructural characteristics of NiO-ZrO<SUB>2</SUB> have been investigated by DSC-TG, XRD, SEM, and IR spectroscopy.The concentration of nickel-salt plays an important role for the enhancement of stabilized tetragonal phase at moderate temperature. From XRD results it was found that the t-ZrO<SUB>2</SUB> was more stabilized with 20 mol% nickel-salt concentration compared with 40 mol% Ni-salt at the same temperature.
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