ALKALI METAL NIOBATE MICRO-NANOWIRE MATERIAL AND PREPARATION METHOD THEREFOR

摘要

Provided are an alkali metal niobate micro-nanowire material and a preparation method therefor: Na₂CO₃, K₂CO₃, BaCO₃, Nb₂O₅, Bi₂O₃ and Li₂CO₃, and Sb₂O₃ are used as raw materials, and batching is carried out according to the chemical formula (1-x)K_yNa_1-yNbO₃-xBaBiO₃ or (0.94-z)K_rNa(_1-r)NbO₃-zBaBiO₃-0.06LiSbO₃, wherein 0.015≤x≤0.07, 0.4≤y≤0.6, 0.016≤z≤0.080, and 0.4≤r≤0.6. The preparation method comprises: 1) drying all of the raw materials in an oven before weighing and batching; 2) batching according to the chemical formula, and ball milling by using anhydrous ethanol as a medium; 3) a ball milled product being extracted, dried and pre-fired; 4) carrying out secondary ball milling by using anhydrous ethanol as the medium; 5) powder material which has been secondary ball milled being extracted, dried, sieved, and pressed into a round billet; 6) solid phase sintering the pressed round billet, and obtaining an alkali metal niobate micro-nanowire from a sintered body. The alkali metal niobate micro-nanowire obtained by the method using a traditional solid phase approach may grow on a ceramic substrate in an oriented arrangement, wherein the length thereof may reach up to the centimeter scale. The method is simple and low cost, while a template and catalyst are not required, and the product is pure.