La(Mg1/2Ti1/2)O-3-La2/3TiO3 microwave dielectric ceramics


Structure and microwave dielectric properties were studied in the (1-x)La(Mg1/2Ti1/2)O-3-xLa(2/3)TiO(3) system. Ceramics with this composition in the 0less than or equal toxless than or equal to0.5 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 tau(f) with increasing of La2/3TiO3 content. Close to zero tau(f) value was found near to x-0.5 composition of (1-x)La(Mg1/2Ti1/2)O-3-xLa(2/3)TiO(3). (C) 2003 Elsevier Ltd. All rights reserved.



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Materials Science


Salak, AN; Seabra, MP; Ferreira, VM

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