Surface characterization and catalytic activity of Ln2Ti2O7 (Ln=Y, Sm, Gd and Tb)

Synthesis and structural characterization of a series of lanthanide stannate pyrochlores

“…They act as potential panacea for the material research fields [2], such as metal-semiconductor transitions [3,4], magnetic frustration/spin ices [5][6][7], colossal magnetoresistance [8], superconductivity [9], ferroelectrics, mixed conductivity [10], pigments and catalysis [11][12][13].…”

Formation enthalpies of rare earth titanate pyrochlores

“…Titanate pyrochlore, A 2 Ti 2 O 7 , materials are important because of their potential use as solid electrolytes and mixed ionic/electronic conducting electrodes [1][2][3][4][5][6][7][8][9], catalysts [10], and ferroelectric/dielectric device components [11][12][13][14]. Pyrochlore is also a mineral, occurring in a wide variety of high-temperature geologic settings, including pegmatites and carbonatites, preferentially incorporating U (up to 30 wt%) and Th (up to 9 wt%) into the structure [15][16][17][18].…”

The effect of synthesis conditions on the structure of compounds formed in the Dy2O3–TiO2 system

“…Appar-ently, this inhomogeneity of the precursor particles during annealing is responsible for initial formation of single oxides, which then react with each other to give dysprosium titanate (Figs. [2][3][4][5] during the solid-state synthesis.…”

“…However, there is still no common opinion about the type (chemical compound or solid solution), composition, and structure of many nLn 2 O 3 · mTiO 2 compounds formed. It is noteworthy that materials based on lanthanide titanates are of high practical value for the manufacture of ionic conductors [2], inert matrix for nuclear waste forms [3], catalysts [4], ferroelectrics [5], and so on.…”