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Microstructural Design of Ba0.5La0.5Co0.5Fe0.5O3 Perovskite Ceramics

Abstract

Ba0.5La0.5Co0.5Fe0.5O3 was synthesized in the solid-state reaction route. The influence of ball milling parameters (such as milling media size, angular velocity, and time), pelletizing pressure, and annealing parameters on the microstructure was studied. The grain size distribution and density or specific surface area changes were investigated in each approach while the individual parameters were changed. The evaluation of BLCF synthesis parameters enables tailoring the microstructure to various applications. It was observed that with lowering the size of milling balls and increasing the angular velocity the material will be porous and thus more appropriate as electrode material in proton ceramic fuel cell or electrolyzer. An increase of time, balls diameter, and/or angular velocity of milling enables one to densify the material in case of membrane application in, e.g., as a gas sensor. The significant influence on densification has also annealing temperature increase. Applying 1200 C during annealing leads to dense material, while at 1100 C shows visible porosity of the product. In this work, we present the results of the BLCF synthesis parameters change allowing the selection of appropriate parameter values depending on the further application as PCCs.

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DOI:
Digital Object Identifier (open in new tab) 10.3390/ma14164656
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Category:
Articles
Type:
artykuły w czasopismach
Published in:
Materials no. 14,
ISSN: 1996-1944
Language:
English
Publication year:
2021
Bibliographic description:
Gierszewska D., Szpunar I., Oseko F., Pośpiech J., Nadolska M., Pieragowska M., Reniecka K., Waniek K., Leszczyński K., Mielewczyk-Gryń A., Gazda M., Wachowski S.: Microstructural Design of Ba0.5La0.5Co0.5Fe0.5O3 Perovskite Ceramics// Materials -Vol. 14,iss. 16 (2021), s.4656-
DOI:
Digital Object Identifier (open in new tab) 10.3390/ma14164656
Sources of funding:
Verified by:
Gdańsk University of Technology

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