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Crystal Structure and Proton Conductivity of BaZr 0.9 Sc 0.1 O 3−δ
Author(s) -
Ahmed Istaq,
Karlsson Maths,
Eriksson StenGunnar,
Ahlberg Elisabet,
Knee Christopher S.,
Larsson Kristian,
Azad Abul K.,
Matic Aleksandar,
Börjesson Lars
Publication year - 2008
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2008.02547.x
Subject(s) - perovskite (structure) , rietveld refinement , neutron diffraction , proton , analytical chemistry (journal) , thermogravimetric analysis , conductivity , materials science , powder diffraction , crystallography , deuterium , crystal structure , x ray crystallography , sintering , mineralogy , diffraction , chemistry , physics , atomic physics , optics , organic chemistry , chromatography , quantum mechanics , composite material
Solid‐state sintering has been used to prepare the perovskite BaZr 0.9 Sc 0.1 O 3−δ . Analysis of X‐ray powder diffraction data shows that an increase of the unit cell parameter, a , was observed after deuteration. Rietveld analysis of room‐temperature neutron powder diffraction data confirmed cubic symmetry (space group Pm‐ 3 m ). Dynamic thermogravimetric analysis indicates that the hydration process occurs below 335°C and approximately 58% of the theoretical number of protonic defects can be filled. The presence of protons/deutrons is seen from the strong O–H/O–D stretch band in the infrared spectrum of the hydrated/deuterated samples. The proton conductivity of a prehydrated sample was investigated under dry and wet Ar atmospheres.