Structural study and proton conductivity in Yb-doped BaZrO3
Artikel i vetenskaplig tidskrift, 2007

Traditional solid state sintering has been used to prepare the perovskite BaZr0.9Yb0.1O3-delta. Analysis of X-ray powder diffraction data shows that an increase of the unit cell parameter, a, was observed compared to undoped BaZrO3. Rietveld analysis of room temperature neutron powder diffraction data confirmed cubic symmetry (space group Pm-3m). Dynamic thermogravimetric analysis (TGA) indicates that the hydration process occurs below 200 degrees C. The strong O-H stretch band, 2500-3500 cm(-1), in the infrared absorbance spectrum clearly manifests the presence of protons in the hydrated material. Proton conductivity was investigated on hydrated and as-prepared samples under dry and wet atmospheres, respectively. Keywords: X-ray diffraction; neutron diffraction; Rietveld refinement; proton conductor; perovskite

STRONTIUM

CONDUCTORS

CERATE

PEROVSKITE-TYPE OXIDES

NEUTRON

POWDER DIFFRACTION

BACEO3

Författare

Istaq Ahmed

Chalmers, Kemi- och bioteknik, Oorganisk miljökemi

Sten Eriksson

Chalmers, Kemi- och bioteknik, Oorganisk miljökemi

Elisabet Ahlberg

Göteborgs universitet

Christopher Knee

Göteborgs universitet

Mikael Götlind

Chalmers, Kemi- och bioteknik

Lars-Gunnar Johansson

Chalmers, Kemi- och bioteknik, Oorganisk miljökemi

Maths Karlsson

Chalmers, Teknisk fysik, Kondenserade materiens fysik

Aleksandar Matic

Chalmers, Teknisk fysik, Kondenserade materiens fysik

Lars Börjesson

Chalmers, Teknisk fysik, Kondenserade materiens fysik

Solid State Ionics

0167-2738 (ISSN)

Vol. 178 (7-10) 515-520

Ämneskategorier

Kemi

Den kondenserade materiens fysik