ANISOTROPICALLY SHAPED POWDER AND METHOD FOR PRODUCING THE SAME

摘要

Provided is an anisotropically shaped powder that is ideal as a plate-like crystal used in the production of a niobate-based KNNbO3-NaNbO3-LiNbO3 crystal oriented ceramic and the like, and further provided is a method for producing the anisotropically shaped powder. The method for producing the anisotropically shaped powder comprises hydrothermal synthesis by adding an oxide powder such as Nb2O5 and a surfactant to an aqueous solution of an alkali hydroxide such as NaOH or KOH, washing the resulting reaction product with an organic solvent, and further baking the washed product at 170ºC to 700ºC. The anisotropically shaped powder obtained according to this production method has a pseudo-cubic perovskite structure in which the crystal face is oriented in the (100) plane and the ratio of the average grain length in the major axis direction and the average grain length in the thickness direction is 2 to 20.