EPITAXIAL ELECTRODEPOSITION OF AG(AG3O4)2NO3 ONTO HIGHLY ORIENTED CONDUCTING METAL-OXIDES IN THE PB-TL-O SYSTEM

The conducting oxy salt Ag(Ag3O4)2NO3 has been electrodeposited onto highly oriented conducting oxides of T12O3 and PbaTlbOc. Tl2O3 was grown in a [100] texture while the mixed oxide PbaTlbOc Was grown with two different thickness-dependent textures of [110] and [210]. The orientation of the Ag(Ag3O4)2NO3 crystals with respect to the substrate surface was determined by X-ray diffraction. The face-centered-cubic Ag(Ag3O4)2NO3 crystals deposited on body-centered-cubic Tl2O3 and face-centered-cubic PbaTlbOc followed the orientation of these prelayers. However, Ag(Ag3O4)2NO3 electrodeposited onto polycrystalline 430 stainless steel had a nearly random orientation. The lattice mismatch is 6.6% between Tl2O3 and Ag(Ag3O4)2NO3, and it is 7.8% between Ag(Ag3O4)2NO3 and the doubled unit cell edge length of PbaTlbOc. It was also found that PbaTlbOc undergoes a transition from a body-centered-cubic to a face-centered-cubic Bravais lattice at a lead content (determined on a metals-only basis) of greater than 40 atom %.