In this work 4mol% of Bi-doped 8YSZ electrolytes were synthesized by a simple co-precipitation route and then sintered at very low temperatures (i.e. 900 - 1100°C). The as synthesized powders were characterized from the structural, microstructural and thermal point of view. Electrochemical properties of the best pellets were evaluated by Electrochemical Impedance Spectroscopy (EIS). Very high values of relative densities (i.e. >95%) were achieved upon all sintered pellets, whose microstructure was highly homogeneous and characterized by micrometric grains. Definitively, Bi has proved to be an excellent sintering aid for YSZ, highly improving its densification at lower temperatures and even increasing its total ionic conductivity.
Low sintering temperature of Bi-doped 8YSZ for IT-SOFC applications
Luca Spiridigliozzi;Gianfranco Dell'Agli;
2017-01-01
Abstract
In this work 4mol% of Bi-doped 8YSZ electrolytes were synthesized by a simple co-precipitation route and then sintered at very low temperatures (i.e. 900 - 1100°C). The as synthesized powders were characterized from the structural, microstructural and thermal point of view. Electrochemical properties of the best pellets were evaluated by Electrochemical Impedance Spectroscopy (EIS). Very high values of relative densities (i.e. >95%) were achieved upon all sintered pellets, whose microstructure was highly homogeneous and characterized by micrometric grains. Definitively, Bi has proved to be an excellent sintering aid for YSZ, highly improving its densification at lower temperatures and even increasing its total ionic conductivity.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
