表面改性纳米SrTiO3粉体的制备

摘要

以硝酸锶、钛酸四丁酯和氢氧化钾为原料,采用水热法制备了SPAN80表面活性剂改性纳米SrTiO3粉体,利用X射线衍射仪、透射电镜、能谱仪、激光粒度仪等分析了粉体的物相组成、形貌和粒径.结果表明:经10%(体积分数)SPAN80表面活性剂改性后,SrTiO3粉体颗粒呈球形,平均粒径小于未改性粉体的,且粒度分布较窄;表面活性剂对粉体的物相组成无影响;当SPAN80表面活性剂的体积分数大于10%时,SrTiO3粉体的粒径又呈增大的变化趋势.%Using strontium nitrate, tetrabutyl titanate and potassium hydroxide as raw materials, SPAN80 surfactant modified SrTiO3 nanopowders were prepared by the hydrothermal method.The phase composition, morphology and particle size of the powder were analyzed by X-ray diffraction, transmission electron microscope, energy disperse spectroscope and laser particle size tester.The results show that after modification with 10vol% SPAN80 surfactant, SrTiO3 powder particles were spherical and the average particle size with a relatively narrow grain-size distribution was lower than that of unmodified powder.The surfactant had no effect on the phase composition of the powder.When the addition of SPAN80 surfactant was higher than 10vol%, the particle size of the SrTiO3 powder showed an increasing trend.