溶剂热法制备织构化Bi0.5Na0.5TiO3陶瓷的影响因素

Influence factors of textured Bi0.5Na0.5TiO_3 ceramics prepared by solvothermal method

    摘要
  • 摘要: 以Bi(NO3)3·5H2O和Ti片为原料,无水乙醇为溶剂,采用溶剂热法合成了具有取向性的织构化Bi0.5Na0.5TiO3(BNT)无铅压电陶瓷.采用X射线衍射(XRD)、场发射扫描电子显微镜(FE-SEM)和能谱仪(EDS)对BNT无铅压电陶瓷物相、显微形貌和成分进行了表征.系统研究了NaOH浓度、Bi3+浓度、表面活性剂和溶剂等因素对BNT晶粒物相、微观形貌和成分的影响.结果表明:NaOH浓度为1 mol·L-1,Bi3+浓度为0.1 mol·L-1,聚乙二醇(PEG)加入量为1~6 mL,且溶剂为无水乙醇时可以制备出织构化BNT陶瓷,产物颗粒尺寸平均为10~20μm.

     

    Abstract: Using Bi(NO3)3·5H2O and Ti substrates as raw materials and absolute ethyl alcohol as a solvent,oriented Bi0.5Na0.5TiO3(BNT) ceramics were synthesized by solvothermal method.The phase,micro-mophology and composition of BNT ceramics were characterized by X-ray diffraction(XRD),field emission scanning electron microscopy(FE-SEM) and energy dispersive spectroscopy(EDS).The effects of factors such as NaOH concentration,Bi3+ concentration,surfactants and solvents on the grain phase,micro-mophology and composition of BNT ceramics were systematically studied.The results show that oriented BNT ceramics are successfully obtained when the NaOH concentration,theBi3+ concentration,the addition of polyethylene glycol(PEG) and the solvent are 1 mol·L-1,0.1 mol·L-1,1 to 6 mL and absolute ethyl alcohol,respectively.The average size of the BNT grains is in the range of 10 to 20 μm.

     

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