学术论文

      溶剂热法制备织构化Bi0.5 Na0.5 TiO3陶瓷的影响因素

      Influence factors of textured Bi0.5 Na0.5 TiO3ceramics prepared by solvothermal method

      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Bi0.5 Na0.5 TiO3(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, 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,the 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.
      作者: 于九利 [1] 张梅 [1] 郭敏 [1] 彭犇 [2]
      作者单位: 北京科技大学冶金与生态工程学院,北京,100083 中国冶金科工集团股份有限公司,北京,100028
      刊 名: 北京科技大学学报 ISTICEIPKU
      年,卷(期): 2011, 33(10)
      分类号: TM282
      机标分类号: TQ1 TM2
      在线出版日期: 2012年4月21日
      基金项目: 国家自然科学基金资助项目,教育部新世纪优秀人才支持计划资助项目