Doping effect on crystal structure and conduction property of fast oxide ion conductor LaGaO3-based perovskite

Study of charge density and crystal structure of (La0.75Sr0.25)MnO3.00 and (Ba0.5Sr0.5)(Co0.8Fe0.2)O2.33−δ at 500–900K by in situ synchrotron X-ray diffraction

“…for oxygen to be mobile; high mobility allows oxygen to leave its site, producing more vacancies with increasing temperature [19]. Wakita and Yashima and Kajitani et al reported that large U iso for oxygen sites is related to high oxygen ion conduction [7,43]. We concluded that the O1(4c) sites in BSCF are responsible for oxygen ion conduction.…”

“…Mogensen et al reported that lattice distortions lead to a decrease in the conductivity of perovskite oxides [6]. Kajitani et al discussed the relation between octahedral tilt angles of oxygen at the B-sites in perovskite oxides and ion conductivity [7]. Yashima et al studied the oxygen ion conduction pass by neutron diffraction [8,9].…”

Size of oxide vacancies in fluorite and perovskite structured oxides

“…Their values (assumed constants) have been determined by fitting Eqs. 10 and 11 to experimental data for La 1-x Sr x Ga 1-y Mg y O 3-0.5x-0.5y [16][17][18] in the equivalent cubic representation. In order to enable a comparison between the unit cells of the different La 1-x Sr x Ga 1-y Mg y O 3-δ materials the volume per A and B site was used.…”

Plasma-Sprayed Strontium- and Magnesium-Doped Lanthanum Gallate Ceramics

“…However, the formation of Sr and Mg poor LaGaO 3 , could not be observed using the XRD pattern. Pure LaGaO is orthorhombic (space group Pbnm ), with a=5.5245 A, b=5.4922 A, and c=7.7740 A at room temperature, whereas LSGM (La 0.9 Sr 0.1 Ga 0.8 Mg 0.2 O 3 ) has been reported to be orthorhombic (space group Imma ) with a=5.5179 A, b=7.8200 A, and c=5.5394 A 17,42,43 . The difference in the crystal structures of the phases results in significantly different XRD patterns, which would be clearly identifiable in the XRD patterns obtained of the samples.…”