The influence of solution concentration, pH value, spin speed and heat treatment on PLT thin film preparation with sol-gel processing is studied. Using such processing, highly oriented PLT thin films with perovskite type structure on SrTiO3 and MgO single crystal substrate, (100) PLT28// (100)SrTiO3 and (100) PLT28//(100) MgO, and PLT ceramic thin films with perovskite type structure on Si single crystal and quartz glass substrate have been prepared. The dielectric constant at room temperature and the break...