欢迎登录材料期刊网

材料期刊网

高级检索

采用传统固相法成功地制备了CaCu3TixO12(x=3.85、3.90、3.95、4.00、4.05)巨介电陶瓷,系统探讨了Ti含量对CaCu3TixO12陶瓷相结构、显微结构和介电性能的影响.通过XRD分析表明,当x<4.00时,CaCu3TixO12出现了第二相(Cu2O);当x≥4.00时,获得了纯相.利用SEM和EDX分析,结果表明,当x<4.00时,陶瓷晶界区域存在大量的富铜相(Cu2O).阻抗谱分析发现,随着Ti含量的增加,陶瓷的晶粒电阻Rg和晶界电阻Rgb先减小后增加的趋势,当x=4.00时,Rg和Rgb最小.室温介电频谱发现,在40~105Hz频率范围内陶瓷(x=4.00)的介电常数都在5.50×104以上,在1kHz下的介电性能为:εr=6.15×104,tanδ=0.044.

参考文献

[1] Subramanian MA.;Duan N.;Reisner BA.;Sleight AW.;Li D. .High dielectric constant in ACu(3)Ti(4)O(12) and ACu(3)Ti(3)FeO(12) phases[J].International Journal of Quantum Chemistry,2000(2):323-325.
[2] LinY H;Cai J N;Li M et al.[J].Journal of Applied Physics,2008,103:074111.
[3] 暮春红;刘鹏;贺颖 等.[J].物理学报,2006,57:2432.
[4] Sinclair D C;Adams T A;Morrison F D et al.[J].Applied Physics Letters,2002,80:2153.
[5] Calvert C C;Rainforth W M;Sinclair D C et al.[J].MICRON,2006,37:412-419.
[6] Seunghwa Kwon;Chien-Chih Huang;M.A. Subramanian .Effects of cation stoichiometry on the dielectric properties of CaCu_3Ti_4O_(12)[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2009(1/2):433-436.
[7] Bochu B;Deschizeaux M N;Joubert J C et al.[J].Journal of Solid State Chemistry,1979,29(02):291-298.
[8] Almeida A F L;Oliveirade R S;Goes J C.[J].Materials Science and Engineering,2002(96):275-283.
[9] Shao S F;Zhang J L;Zheng P et al.[J].Journal of Applied Physics,2006,99:084106.
[10] Adams T B;Sinclair D C;West A R .[J].Advanced Materials,2002,18:1321.
上一张 下一张
上一张 下一张
计量
  • 下载量()
  • 访问量()
文章评分
  • 您的评分:
  • 1
    0%
  • 2
    0%
  • 3
    0%
  • 4
    0%
  • 5
    0%