洪序达,王歆,刘继洪.SrBi2Ta2O9铁电陶瓷的制备及其Ca掺杂研究[J].压电与声光,2012,34(4):601-604.HONG Xuda,WANG Xin,LIU Jihong.Preparation and Research on Ca Doping of SrBi2Ta2O9 Ferroelectric Ceramics[J].PIEZOELECTRICS AND ACOUSTOOPTICS
SrBi2Ta2O9铁电陶瓷的制备及其Ca掺杂研究
Preparation and Research on Ca Doping of SrBi2Ta2O9 Ferroelectric Ceramics
  
DOI:10.11977/j.issn.1004-2474.2012.04.030
中文关键词:  SrBi2Ta2O9  铋系层状钙钛矿  聚合物前驱体法  介电性能  铁电性能
英文关键词:SrBi2Ta2O9  bismuth layer perovskite  polymeric precursor method  dielectric properties  feroelectric properties
基金项目:广州市天河科技计划基金资助项目(101ZH126)
作者单位
洪序达 (华南理工大学 材料科学与工程学院,广东 广州 510640) 
王歆  
刘继洪  
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中文摘要:
      采用聚合物前驱体法制备了单一铋系层状钙钛矿相SrBi2Ta2O9粉体,研究了不同烧成温度对SrBi2Ta2O9陶瓷相结构和介电、铁电性能的影响。结果表明,随着烧成温度的升高,晶粒沿c轴择优取向趋势增强;不同烧成温度下陶瓷介电常数和损耗均随频率升高而降低,1 000 ℃时陶瓷有最大介电常数和较小的损耗,且陶瓷有较大的剩余极化值和较小的矫顽电场,分别为3.884 μC/cm2和25.37 kV/cm。不同Ca掺杂量掺杂后,SrBi2Ta2O9陶瓷的介电常数、损耗和剩余极化值均显著降低。
英文摘要:
      SrBi2Ta2O9 powder with pure bismuth layer perovskite phase was prepared by polymeric precursor method.The influence of sintering temperatures to the dielectric and ferroelectric properties of SrBi2Ta2O9 ceramics were studied.The results showed that the degree of c axis preferred orientation of ceramic grains increased with the rising of sintering temperature.Dielectric constant and dielectric loss of ceramics sintered in different temperatures all decreased with the increasing of frequency and dielectric constant was maximal and dielectric loss was smaller when sintering temperature was 1 000 ℃.At the same time,ceramics have bigger polarization and smaller electric field,which were 3.884 μC/cm2 and 25.37 kV/cm respectively.Dielectric constant,dielectric loss and remanent polarization of SrBi2Ta2O9 ceramic all reduced significantly after Ca doping with different doped quantity.
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