CPL - Chalmers Publication Library
| Utbildning | Forskning | Styrkeområden | Om Chalmers | In English In English Ej inloggad.

Effect of co-doping on proton conductivity in perovskite oxides BaZr0.9In0.05M0.05O3−δ (M = Yb3+ or Ga3+)

Istaq Ahmed (Institutionen för kemi- och bioteknik, Oorganisk miljökemi) ; Seikh Rahman (Institutionen för kemi- och bioteknik, Oorganisk miljökemi) ; Patrick Steegstra ; Stefan T. Norberg (Institutionen för kemi- och bioteknik, Oorganisk miljökemi) ; Sten G. Eriksson (Institutionen för kemi- och bioteknik, Oorganisk miljökemi) ; Elisabet Ahlberg ; Christopher S Knee (Institutionen för kemi- och bioteknik, Oorganisk miljökemi) ; Steve Hull
International Journal of Hydrogen Energy (0360-3199). Vol. 35 (2010), 12, p. 6381-6391.
[Artikel, refereegranskad vetenskaplig]

BaZr0.9In0.05M0.05O3-d (M ¼ Ga3+ or Yb3+) has been prepared by solid-statesynthesis route. Rietveld analysis of neutron powder diffraction data on as-prepared samples showed that both samples crystallise in the cubic space group Pm-3m. Scanning electron microscopy analysis showed that the grains intheBaZr0.9In0.05Ga0.05O3-d sample were larger than the BaZr0.9In0.05Yb0.05O3-d sample. Dynamic thermogravimetric analysis indicates that the proton concentration was higher inpre-hydrated BaZr0.9In0.05Ga0.05O3-d sample (40%of theoretical)than that of BaZr0.9In0.05Yb0.05O3-d sample (28%oftheoretical).Proton conductivity was studied on pre-hydrated samples(under both dry and wetAr atmospheres).The bulk proton conductivities of the heating cycle of pre-hydrated BaZr0.9In0.05M0.05O3-d (M ¼ Ga3+ or Yb3+) samples were 2.1 * 10-5 S cm-1 and 1.9 * 10-4 S cm-1 at 350C, respectively.The effect of co-doping onproton conductivity was investigated and the results are compared with single doped systems e.g. BaZr0.9M0.1O3-d (M=Ga3+, In3+ or Yb3+) samples.

Nyckelord: Neutron diffraction; Rietveld analysis; TGA; SEM; Proton conductor; Impedance spectroscopy



Denna post skapades 2010-06-10. Senast ändrad 2016-07-01.
CPL Pubid: 122561

 

Läs direkt!


Länk till annan sajt (kan kräva inloggning)


Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Oorganisk miljökemi (2005-2014)
Institutionen för kemi (2001-2011)

Ämnesområden

Fasta tillståndets kemi
Funktionella material

Chalmers infrastruktur