铌酸铋钠压电陶瓷超细粉体的水热合成

Preparation of Sodium Bismuth Niobate Fine-powders by Hydrothermal Method

以NaOH、Bi2O3和Nb2O5为原料,KOH为矿化剂,通过乙二醇采用水热法合成了结晶度高、晶粒发育完整的Na1.5Bi2.5Nb3O12粉体。借助XRD分析了反应温度和反应时间对其相结构的影响,并通过SEM分析了Na1.5Bi2.5Nb3O12晶粒形貌。实验结果表明:在反应温度为160℃、反应时间为18h的条件下,可得到厚度约50nm、直径约为200nm的片层结构纯相Na1.5Bi2.5Nb3O12粉体。

Na1. 5 Bi2.5 Nb3 O12 powders which are high crystallinity and perfect fine-grains are prepared by hy-drothermal method using Nb2O5, Bi2O3, NaOH as raw materials, and KOH serves as a mineralizer with the addition of ethylene glycol. The influence of the reaction temperature and the reaction time on the phase structure is analyzed by means of X-ray diffraction （XRD）. The morphology of Na1.5Bi2.5Nb3O12 is analyzed by scanning electron microscopy （SEM）. The results show that pure Na1.5Bi2.5NbaO12 plates-lay-ered structure powders with the average thickness of 50nm and diameter of 200 nm are synthesized at the reaction temperature of 160 ℃ and the reaction time of 18 h.