High-temperature phase transition in lanthanum titanate perovskite La0.64(Ti0.92,Nb0.08)O3

Lanthanum Influence onEuAlO3Perovskite Structural Properties: Experimental and Molecular Dynamics Studies

“…The 4f electrons of doping species are responsible for changes in their magnetic, electric, and optical properties. Rare earths containing perovskites have attracted attention mainly as semiconductor and/or optical materials [3][4][5]. A particularly interesting system that has not been thoroughly studied is the La 1−x Eu x AlO 3 perovskite.…”

Neutron Powder Diffraction Study of a Phase Transition in La0.68(Ti0.95Al0.05)O3

“…D oped ‐La 2/3 TiO 3 materials have an A‐site layered‐deficient perovskite‐type structure (ABO 3 ), where A=La 2/3± y , B=(Ti 1− x M x ), and M is the dopant cation 1–9 . These materials are attractive owing to their high ion conductivities and dielectric properties 1–4,10,11 .…”

“…These materials are attractive owing to their high ion conductivities and dielectric properties 1–4,10,11 . Thus, many researchers have studied the unit‐cell parameters, phase transition, and structural parameters of these compounds 1,4–8,12–15 . Conventional X‐ray diffraction techniques have suggested that at room temperature, the lanthanum aluminum titanate La 0.68 (Ti 0.95 Al 0.05 )O 3 has an orthorhombic Pmmm structure with an a p × a p × 2 a p cell 4–6 .…”

“…These lines provide important information for determination of the crystal symmetry. Yashima et al 7 studied the crystal structure of La 0.64 (Ti 0.92 Nb 0.08 )O 3 using neutron powder diffraction data and reported the space group of the low‐temperature phase to be orthorhombic Cmmm with the unit‐cell system 2 a p × 2 a p × 2 a p . No neutron‐diffraction study has yet been published on the crystal structure of La 0.68 (Ti 0.95 Al 0.05 )O 3 .…”

Raman spectra and extended X-ray absorption fine structure characterization of La(2−x)/3NaxTiO3 and Nd(2−x)/3LixTiO3 microwave ceramics

“…More recently, precision measurement was made to demonstrate that the crystal symmetry of La 2/3 TiO 3 and Nd 2/3 TiO 3 is orthorhombic Cmmm. 1,4,6,9 Doping Li + ion into La 2/3 TiO 3 and Nd 2/3 TiO 3 compounds results in high ionic conductivity, which can applied to solid oxide fuel cells (SOFC) and other electrodevices. [10][11][12][13][14][15] Meanwhile, substituting Na + ions in La 2/3 TiO 3 has been much less studied.…”