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|Title:||Investigation on Ag2SO4:La2(SO4)3 binary system|
Anwane, S W
Bhoga, S S
|Abstract:||The ionic conductivity of (100-x) Ag2SO4: (x) La2(SO4)3 (where x = 0 to 60) system is investigated using complex impedance spectroscopy. The solid solubility limit up to 3.63 mole % of La2(SO4)3 in room temperature orthorhombic β-Ag2SO4 is set with the help of X-ray powder diffraction, differential scanning calorimetry and scanning electron microscopy. The ionic transport number seen to remain invariant with SO2 partial pressure. The major contribution to the conductivity within solid solubility limit is explained on the basis of presence of additional extrinsic vacancies. In bi-phase region, the ‘optimum’ dispersion of La2(SO4)3 for x=30 provides conductivity enhancement by two orders of magnitude.|
|ISSN:||0975-1041 (Online); 0019-5596 (Print)|
|Appears in Collections:||IJPAP Vol.37(04) [April 1999]|
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