“…3 and 4. The cell parameters and space groups of these compositions are summarised in Table I, and they are in accord with the literature (18). It should be noted that an increase …”
Section: Determination Of the Ion Transport Numbers By A Modified Emfsupporting
A combination of impedance spectroscopy and a modified electromotive force method (emf) were used to evaluate the ionic transport numbers and the overall conductivity of several doped lanthanum gallate materials, i.
“…3 and 4. The cell parameters and space groups of these compositions are summarised in Table I, and they are in accord with the literature (18). It should be noted that an increase …”
Section: Determination Of the Ion Transport Numbers By A Modified Emfsupporting
A combination of impedance spectroscopy and a modified electromotive force method (emf) were used to evaluate the ionic transport numbers and the overall conductivity of several doped lanthanum gallate materials, i.
“…The first order structural phase transition in LaGaO 3 , from orthorhombic Pbnm (Pnma in standard setting) to rhombohedral F32=n (R3c in standard setting) has been the subject of numerous studies in recent years [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. We make this choice of the rhombohedral space group setting as it allows ease of comparison with both the aristotype and hettotype phases of perovskitestructured phases that is not immediately apparent from the more commonly used primitive rhombohedral, or triply-primitive hexagonal settings.…”
“…XRD patterns have been identified as the desired perovskite phase with the cubic structure (space group Pm3m) for LSGM (23,24) and LSGMC (25). The secondary phases of LaSrGa 3 O 7 (JCPDS # 45-0637) and LaSrGaO 4 (# 80-1806) were present in both LSGM and LSGMC samples at the low calcination temperature.…”
Section: Resultsmentioning
confidence: 96%
“…The secondary phases of LaSrGa 3 O 7 (JCPDS # 45-0637) and LaSrGaO 4 (# 80-1806) were present in both LSGM and LSGMC samples at the low calcination temperature. Both LaSrGa 3 O 7 and LaSrGaO 4 have been reported as minor phases during the synthesis of LSGM (24,26) and of LSGMC (27). Neither of the secondary phases is desirable.…”
16 Ω were measured for LSCF/LSGMC composite cathode on LSGM substrate at 800ºC in air. Low-frequency secondary arcs in the impedance spectra of LSCF/LSGMC cathode coupled with low current density and low cathode porosity suggested possible mass transfer limitations. The LSCF/LSGMC composite electrode performed best at 800ºC (0.11 A/cm 2 at 0.045 V overpotential) while the BSCF/LSGMC performed best at the lowest temperature investigated (0.1 A/cm 2 at 700ºC and 0.04 V overpotential).
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