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Fabrication of improved La 0.8 Sr 0.2 MnO 3 cathode layer for solid oxide fuel cells using economical coating methods
Author(s) -
Javanshir Ehsan,
Mozammel Mahdi,
Tanhaei Mohammad
Publication year - 2017
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12843
Subject(s) - materials science , coating , layer (electronics) , substrate (aquarium) , scanning electron microscope , dip coating , fabrication , yttria stabilized zirconia , composite material , chemical engineering , metallurgy , cubic zirconia , ceramic , medicine , oceanography , alternative medicine , pathology , engineering , geology
Abstract The aim of this study is to specify an optimal method for coating LSM layer on a YSZ substrate. Initially the prepared powders were validated by X‐Ray Diffraction ( XRD ) technique. A mixture of NiO‐ YSZ (50:50 wt%) powders were created by mechanical milling method; then the mix was prepressed in a disk shape die as the base substrate; after that, YSZ powder was added on the substrate and they were pressed and sintered at 1450°C for 3 hours. Three different methods including dip coating, spraying, and brush painting using various concentrations of LSM suspensions, were applied on the obtained substrate. Then, LSM coated disks were sintered at 1250°C for 2 hours. The coating surface and the cross section of the as‐sintered disks which were investigated and scanned by an electron microscope ( SEM ), illustrated a uniform coating in dip‐coated samples; also, another advantage of this method was the negligible agglomeration of the LSM layer. Moreover, the linear EDS elemental analysis from the surface of the layer—which is coating the substrate—indicated the desired results for the coating which was fabricated by the dip coating method.