Low temperature assisted chemical coprecipitation synthesis of 8YSZ plasma sprayable powder for solid oxide fuel cells

Aruna, ST and Narayanaswamy, Balaji and Prakash, Badi shri (2011) Low temperature assisted chemical coprecipitation synthesis of 8YSZ plasma sprayable powder for solid oxide fuel cells. International Journal of Hydrogen energy, 36. pp. 14963-14970.

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Abstract

Plasma spraying is one of the potential manufacturing technologies widely used in tubular solid oxide fuel cells (SOFC) fabrication. The plasma spray technology requires powders with good flowability and large particle size (5e200 mm). A simple, low temperature assisted chemical process was used for the preparation of plasma grade yttria stabilized zirconia powder without any agglomeration process. The powder was characterized by X-ray diffractometry, particle size analysis, scanning electron microscopy and Raman spectroscopy. The powder exhibited cubic phase, good flowability and blocky angular shape. The 8YSZ powder was plasma sprayed and the coatings after sintering showed gas tightness (gas leak ratew1 � 10�6 mbar l s�1 cm2). This was substantiated by the presence of densely packed grains as seen in the surface FESEM image of the sintered plasma sprayed 8YSZ free form. Conductivity values in par with the values reported in literature were obtained for plasma sprayed 8YSZ coating.

Item Type: Article
Uncontrolled Keywords: Solid oxide fuel cells, Plasma sprayable, Electrolyte microstructure, AC conductivity
Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Depositing User: Users 10 not found.
Date Deposited: 21 Sep 2012 08:26
Last Modified: 21 Sep 2012 08:26
URI: http://nal-ir.nal.res.in/id/eprint/10931

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