Effects of sol-gel processing parameters and substrates on crystallization of potassium tantalate-niobate thin films

Potassium tantalate-niobate thin films were prepared from metal-organic compounds by sol-gel processing. Effects of substrates and processing parameters on K(Ta, Nb)O-3 thin film growth were studied. The results slowed that perovskite phase of K(Ta, Nb)O-3 was formed through the reactions of pyrochlore phases, and K(Ta, Nb)O-3 thin films with pure perovskite phase can be obtained. The formation mechanism of the perovskite phase of K(Ta, Nb)O-3 on SrTiO3 and MgO single crystal substrates was discussed, and the causes that K(Ta, Nb)O-3 thin films with pure perovskite structure on single crystal silicon and quartz glass substrates cannot be obtained was detailed.