SOME RESEARCH RESULTS ON THE SYNTHESIS OF KNLN CERAMIC POWDER BY THE MOLTEN SALT METHOD

Abstract

The (K_0,48Na_0,48Li_0,04)NbO₃ (KNLN) ceramic powder was prepared by molten salt method using NaCl-KCl salt mixture as solvent. A pure perovskite phase structure with orthorhombic symmetry of KNLN powder was achieved at calcium temperature of 750^oC lower than that of traditional oxide mixing method (850-900^oC). The SEM images also showed that at 750^oC, cubic crystal grains with sharp edges reflecting crystal symmetry and high crystallinity were obtained, the average grain size was about 200-250 nm.