La(Mg1/2Ti1/2)O3–La2/3TiO3 microwave dielectric ceramics

Structure and microwave dielectric properties were studied in the (1−x)La(Mg1/2Ti1/2)O3–xLa2/3TiO3 system. Ceramics with this composition in the 0⩽x⩽0.5 range were processed from powders obtained by a citrate-based chemical route. Structure of these perovskite solid solutions changed from orthorhombic for x=0.1 and 0.3 to pseudocubic for x=0.5. Microwave and radio frequency measurements revealed increase in permittivity and temperature coefficient of the resonant frequency τf with increasing of La2/3TiO3 content. Close to zero τf value was found near to x=0.5 composition of (1−x)La(Mg1/2Ti1/2)O3–x La2/3TiO3.