Structural and electrical properties of BaCe(Ti,Y)O3 protonic conductors

Advanced materials for SOFC application: Strategies for the development of highly conductive and stable solid oxide proton electrolytes

“…Based on the level of activation energy, calculated using conductivity dependencies on temperature, Talimi et al [36] concluded that the materials behaved like ionic-hole conductors in air and like co-ionic ones in humid hydrogen atmosphere. The influence of yttrium on the properties of barium cerate, containing small amount of titanium, was studied by Pasierb et al [37]. Materials with composition Ba(Ce 0.95 Ti 0.05 ) 1−х Y х O 3−δ (х=0, 0.05, 0.1 and 0.2) were synthesized by the solid phase method at 1200°С for 24 h and sintered at 1600°С for 24 h. The complex oxides were identified within the orthorhombic syngony.…”

“…95 for Ba(Ce 0.95 Ti 0.05 ) 1−х Y х O 3−δ samples in 21% O 2 /N 2 (a) and 5% Н 2 /Ar (b) at 515°С [37].…”

“…Electrical conductivity and activation energy of Ba(Ce 0.95 Ti 0.05 ) 1−х Y х O 3−δ materials in 21%О 2 /N 2 (а) and 5%Н 2 /Ar (b)[37].…”

“…Transport numbers of electrons t(e), oxygen ions t(O), protons t(H), and ions t(i) for Ba(Ce 0.95 Ti 0.05 ) 1−х Y х O 3−δ samples in 21% O 2 /N 2 (a) and 5% Н 2 /Ar (b) at 515°С[37].…”

VUV photoluminescence of (Y0.5Gd0.5)0.94VO4:Eu3+ red-emitting phosphors prepared by the solution combustion method

“…The radius of Eu 3+ is quite similar to that of Gd 3+ and Y 3+ , thereby forming a solid solution. The radii of Eu 3+ , Gd 3+ , and Y 3+ are 0.947, 0.94, and 0.900 Å , respectively [11,12]. The crystallite size (D) of the annealed (Y 0.5 Gd 0.5 ) 0.94 Eu 0.06 VO 4 phosphors is calculated from the Scherrer formula: D = (0.9l)/(b cos u), where l is the wavelength of radiation, u is the angle of the diffraction peak, and b is the full width at half maximum of the diffraction peak (in radian) [13].…”