Study of the Theological behavior of an anode slurry and the microstructural properties of an anode functional film obtained by spray coating

摘要

Slurries prepared by mixing organic additives with NiO/YSZ powders were deposited by spray coating onto an anode substrate obtained by tape casting to produce a NiO/YSZ anode functional layer with 40 wt.% NiO. The rheology and the chemical stability of slurries with two concentrations of polymethylmethacrylate (PMMA), 1 and 2 wt.%, were systematically studied, and the microstructures of the anode functional films obtained were compared. Rheological measurements showed that both slurries present pseudoplastic and thixotropic behaviors and that the 2 wt.% PMMA slurry is more homogeneous and maintains chemical stability over a longer period of time. The anode functional films showed good adherence and were free of cracks.