一段階溶融塩法による板状NaNbO3 結晶粒の作製

Abstract

In order to improve the sinterability of textured (K,Na)NbO3 system ceramics, the fabrication method for platelike NaNbO3 single-crystal particles partially substituted with K or Li atoms for Na atoms was studied. The platelike NaNbO3 single-crystal particles obtained by single–step molten salt synthesis in conventional NaCl salt were post-annealed in potassium, lithium, or their mixed salts. The direct synthesis of the single-crystal particles in the mixed salts was also employed without post-annealing. Using the platelike NaNbO3 single-crystal particles partially substituted with K as the templates in reactive template grain growth method, firing period for sintering the textured ceramics was successfully reduced to one sixth. Keywords: Lead-free piezoelectric ceramics, Template grain growth, Single-step molten salt synthesis