Crystal structure and proton conductivity of BaSn_0.6Sc_0.4O_3-δ : insights from neutron powder diffraction and solid-state NMR spectroscopy.

ABSTRACT: The solid-state synthesis and structural characterisation of perovskite BaSn_1-x Sc _x O_3-δ (x = 0.0, 0.1, 0.2, 0.3, 0.4) and its corresponding hydrated ceramics are reported. Powder and neutron X-ray diffractions reveal the presence of cubic perovskites (space group Pm3m) with an increasing cell parameter as a function of scandium concentration along with some indication of phase segregation. ¹¹⁹Sn and ⁴⁵Sc solid-state NMR spectroscopy data highlight the existence of oxygen vacancies in the dry materials, and their filling upon hydrothermal treatment with D₂O. It also indicates that the Sn⁴⁺ and Sc³⁺ local distribution at the B-site of the perovskite is inhomogen

SUBMITTER: Kinyanjui FG 

PROVIDER: S-EPMC4894074 | biostudies-literature | 2016 Apr

REPOSITORIES: biostudies-literature