Back to Search
Start Over
Synthesis and electrical characterization of BaZr0.9Ho0.1O3-δ electrolyte ceramic for IT – SOFCs.
- Source :
- AIP Conference Proceedings; 2018, Vol. 1942 Issue 1, p1-1, 1p
- Publication Year :
- 2018
-
Abstract
- A cost-effective modified combustion method using citric acid and glycine has recently been developed to synthesize high quality, and nanosized BaZr<subscript>0.9</subscript>Ho<subscript>0.1</subscript>O<subscript>3</subscript> ceramic powder. BaZr<subscript>0.9</subscript>Ho<subscript>0.1</subscript>O<subscript>3-δ</subscript> ceramic powder was characterized by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM) and field emission scanning electron microscopy (FESEM). XRD pattern of BaZr<subscript>0.9</subscript>Ho<subscript>0.1</subscript>O<subscript>3-δ</subscript> ceramic sintered at 1600 °C has shown that pure phase of BaZr<subscript>0.9</subscript>Ho<subscript>0.1</subscript>O<subscript>3-δ</subscript> with cubic <italic>Pm</italic>3̄<italic>m</italic> space group symmetry. The transmission electron microscopic investigation has shown that the particle size of the powder calcined at 1100 °C was in the range 30–80 nm. The FESEM image of sintered pellet at 1600 °C for 4 h reveals porous nature of BaZr<subscript>0.9</subscript>Ho<subscript>0.1</subscript>O<subscript>3-δ</subscript> with 83.7 relative density. Impedance analysis reveal three type relaxations in the temperature range 250 °C to 500 °C as studied at different frequencies over 100 Hz to 1 MHz in air. The grain boundary conductivity of BaZr<subscript>0.9</subscript>Ho<subscript>0.1</subscript>O<subscript>3-δ</subscript> ceramic is found lower then grain (bulk) conductivity due to core-space charge layer behavior in grain boundary. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0094243X
- Volume :
- 1942
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- AIP Conference Proceedings
- Publication Type :
- Conference
- Accession number :
- 129032868
- Full Text :
- https://doi.org/10.1063/1.5029195