Sökning: id:"swepub:oai:research.chalmers.se:d6841340-eb5c-415c-99be-143617892b87" >
Structural study an...
Structural study and proton conductivity of BaZr0.90Ga0.10O2.95
-
- Ahmed, Istaq, 1972 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för kemi,Department of Chemistry,University of Gothenburg
-
Eriksson, S-G (författare)
-
- Knee, Christopher, 1973 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för kemi,Department of Chemistry,University of Gothenburg
-
visa fler...
-
Karlsson, M. (författare)
-
Matic, A (författare)
-
Börjesson, L (författare)
-
visa färre...
-
(creator_code:org_t)
- 2008-03-26
- 2006
- Engelska.
-
Ingår i: Advances of Solid Oxide Fuel Cells II, Ceramic Engineering and Science Proceedings. - Hoboken, NJ, USA : John Wiley & Sons, Inc.. ; 27:4, s. 105-117
- Relaterad länk:
-
http://dx.doi.org/10...
-
visa fler...
-
https://research.cha...
-
https://doi.org/10.1...
-
https://gup.ub.gu.se...
-
visa färre...
Abstract
Ämnesord
Stäng
- Traditional solid state sintering has been used to prepare the perovskite BaZr0.9Ga0.1O2.95. Analysis of X-ray powder diffraction data shows that a decrease of the unit cell parameter a was observed compared to the undoped BaZrO3, which confirms successful substitution of Ga3+ for Zr4+ at the B site. Rietveld analysis of room temperature neutron powder diffraction data confirmed cubic symmetry (space group Pm-3m) for both as- prepared and deuterated BaZr0.90Ga0.10O2.95 samples. The strong O-H stretch band (2500-3500 cm−1) in the infrared absorbance spectrum clearly manifests the presence of protons in the pre-hydrated material. The bulk and total conductivities of prehydrated BaZr0.9Ga0.1O2.95 are 1.17 × 10−5 and 3.55 × 10−6 Scm−1, respectively at 400°C, which are more than one order of magnitude higher than for dried a sample at the same temperature. In contrast, the total conductivity of pre-hydrated and dried samples is similar at higher temperature, e. g. T > 800 °C. The higher activation energy (e. g. 0.7 eV) for pre-hydrated sample compared to typical value (0.4-0.5 eV) of proton conduction may suggest that the protons are trapped in the material.
Ämnesord
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Nyckelord
- spectroscopy
- protons
- monochromator
- polynomial
- hydrocarbons
- hydrocarbons; protons; spectroscopy; monochromator; polynomial
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
Hitta via bibliotek
Till lärosätets databas