La2O3 MgO Research Articles

Phase equilibria, and electrical properties of compounds in the system MgO–La2O3–TiO2 at 1200°C

Abstract Phase relations, the existence of compounds and their electrical properties in the system MgO–La 2 O 3 –TiO 2 have been investigated by means of solid state synthesis, X-ray diffraction analysis and a.c. impedance technique. Three compounds, MgLa 10 Ti 7 O 30 (hexagonal, a =0.55642 nm, c =1.09916 nm, Z =1), MgLa 6 Ti 4 O 18 (hexagonal, a =0.5566 nm, c =3.9692 nm, Z =3) and the new compound MgLa 2 TiO 6 (orthorhombic a =0.56511 nm, b =0.76902 nm, c =0.55125 nm, V =2.395 nm 3 , Z =2) were found in the system. The conductivity and dielectric constants of the pure phases were also measured. It was found that the ϵ ′ value of MgTi 2 O 5 is 80, whereas the ϵ ′ value of the other phases are less than 63.

Surface Properties of CaO (or BaO)–La2O3–MgO Catalysts and Their Performance in Oxidative Coupling of Methane

Surface Properties of CaO (or BaO)–La2O3–MgO Catalysts and Their Performance in Oxidative Coupling of Methane