MICROWAVE DIELECTRIC-PROPERTIES OF LAZN0.5TI0.5O3 CERAMICS PREPARED BY SOL-GEL PROCESS

Some dielectric properties of LaZn0.5Ti0.5O3 (LZT) ceramics prepared b y means of the sol-gel method have been investigated. The calcination of powders derived from amorphous gel at 600 degrees C results in the formation of a pure orthorhombic phase of LZT. The high sintering abil ity of the prepared powders enables the fabrication of dielectric cera mics at low sintering temperatures (1350-1400 degrees C). At higher te mperatures, the sintering process is followed by a decomposition react ion with the formation of La2TiO3 and ZnO vapor. A dielectric material having epsilon(r) similar or equal to 30 and Q . f(o) similar or equa l to 60000 GHz is obtained at 1350 degrees C.