超声化学法快速合成BaTiO_3纳米粉体

Rapid formation of BaTiO_3 nanopowders by sonochemical method

以Ba(OH)2和Ti(OC4H9)4作为Ba源和Ti源,利用超声化学法合成结晶良好的BaTiO3纳米粉体。用X线衍射仪(XRD)、场发射扫描电子显微镜(FESEM)和Zeta电位/粒度分析仪考察V(C2H5OH)∶V(H2O)和反应时间对合成产物的物相、形貌和粒度分布的影响。结果表明:乙醇的加入对规则球形纳米BaTiO3颗粒的形成有积极的作用。当V(C2H5OH)∶V(H2O)为3∶1,超声反应20 min即可得到一次颗粒尺寸约为35 nm的立方相球形BaTiO3粉体。

BaTiO3 nanopowders with high crystallinity were synthesized by a sonochemical method using Ba（OH）a as the barium source and Ti（ OCaH9 ）4 as the titanium source. The as-prepared BaTiO3 pow- ders were characterized by X-ray diffraction （XRD）, field-emission scanning electron microscopy （FESEM） and zeta potential/particle size analyzer, respectively. The effects of reaction parameters （ the volume ratio of ethanol to water and reaction time） on the phase, morphology and size of BaTiO3 were in- vestigated. The results showed that the addition of C2HsOH had positive effects on the formation of regu- lar spherical BaTiO3 nanoparticles. The cubic BaTiO3 particles with spherical morphology were synthe- sized by ultrasonic radiation for 20 min, the size of the individual particles was about 35 nm.