TY  - JOUR
T1  - Application of Nanostructured<sub>0.19</sub> Ba(NO<sub>3</sub>)<sub>2</sub>-<sub>0.81</sub> KNO<sub>3</sub>: CeO<sub>2</sub> for Solid Oxidefuel Cell
AU - Devi, S. Shashi 
JO  - Journal of Engineering and Applied Sciences
VL  - 12
IS  - 13
SP  - 3345
EP  - 3348
PY  - 2017
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2017.3345.3348
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2017.3345.3348
KW  - Composite solid electrolyte
KW  -ionic conductors
KW  -conductivity enhancement
KW  -dispersoid
KW  -nanostructure
KW  -space charge region
AB  - Synthesis, characterization, electrical and dielectrical properties have been made in nanostructured components of <SUB>0.19</SUB>Ba(NO<SUB>3</SUB>)<SUB>2</SUB>-<SUB>0.81</SUB>KNO<SUB>3</SUB>: Al<SUB>2</SUB>O<SUB>3</SUB>, <SUB>0.19</SUB>Ba(NO<SUB>3</SUB>)<SUB>2</SUB>-<SUB>0.81</SUB>KNO<SUB>3</SUB>: SiO<SUB>2, 0.19</SUB>Ba(NO<SUB>3</SUB>)<SUB>2</SUB>-<SUB>0.81</SUB>KNO<SUB>3</SUB>: CeO<SUB>2</SUB> solid electrolyte  systems.  The  system <SUB> 0.19</SUB>Ba(NO<SUB>3</SUB>)<SUB>2</SUB>-<SUB>0.81</SUB>KNO<SUB>3</SUB> with 1.1, 5.3, 10.8 and 20 mole percentages of Al<SUB>2</SUB>O<SUB>3</SUB> (1000, 300 and 60 nm), SiO<SUB>2</SUB> (20 nm) and CeO<SUB>2</SUB> (10 nm) have been characterized through X-ray diffraction, DSC and SEM. The electrical and dielectrical properties of these materials have shown an increase in conductivity as the temperature rises from room temperature to almost melting point of pure system. The enhancement of ionic conductivity observed to an increase with m/o and reaches to maximum at 10.8 m/o for Al<SUB>2</SUB>O<SUB>3</SUB> (1000 nm), 10.8 m/o for Al<SUB>2</SUB>O<SUB>3</SUB> (300 nm), 5.3 m/o for Al<SUB>2</SUB>O<SUB>3</SUB> (60 nm), 10.8 m/o for SiO<SUB>2</SUB> (20 nm) and 10.8 m/o for CeO<SUB>2</SUB> (10 nm) mole  percentages  followed  by  a  fall  of  conductivity  with  further  increase  of  dispersion  to  the  host material. X-ray diffraction patterns of pure mixed system <SUB>0.19</SUB>Ba(NO<SUB>3</SUB>)<SUB>2</SUB>-<SUB>0.81</SUB>KNO<SUB>3</SUB> and 1.1, 5.3, 10.8 and 20 m/o dispersed systems have shown that pure phases of host and dispersoid materials coexist in the dispersed systems indicating that there is no chemical reaction between them. The enhancement of conductivity in these systemsis explained as due to the increased concentration of defects in space charge region formed between the host and nano particles of dispersoid. The optimized nanoceria added to <SUB>0.19</SUB>Ba(NO<SUB>3</SUB>)<SUB>2</SUB>-<SUB>0.81</SUB>KNO<SUB>3</SUB> is considered to give the best performance for application in the solid oxide fuel cells.
ER  -