IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v10y2017i7p1031-d105154.html
   My bibliography  Save this article

High Breakdown Field CaCu 3 Ti 4 O 12 Ceramics: Roles of the Secondary Phase and of Sr Doping

Author

Listed:
  • Zhuang Tang

    (State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, China)

  • Kangning Wu

    (State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, China)

  • Yuwei Huang

    (State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, China)

  • Jianying Li

    (State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, China)

Abstract

In this work, two methods of CaCu 3 Ti 4 O 12 -CuAl 2 O 4 composite and SrCu 3 Ti 4 O 12 -CaCu 3 Ti 4 O 12 composite were prepared to improve the breakdown field in CaCu 3 Ti 4 O 12 ceramics. CaCu 3 Ti 4 O 12 -0.5CuAl 2 O 4 and 0.4SrCu 3 Ti 4 O 12 -0.6CaCu 3 Ti 4 O 12 samples with proper sintering conditions were found to have greatly enhanced breakdown fields of more than 20 kV·cm − 1 compared to the ordinary value of 1–2 kV·cm − 1 in CaCu 3 Ti 4 O 12 ceramics. In addition, reduced dielectric loss tangent of these samples remained about 0.1 at a low frequency of 0.1 Hz, indicating superior dielectric properties. No abnormal grain growth was found in either composite with a high breakdown field, which was attributed to the pining effect and consumption of Cu-rich phase at grain boundaries. Under analysis of the relaxation process by electric modulus, compared to conventional CaCu 3 Ti 4 O 12 ceramics, interstitial Al i ··· and increasing interfaces were responsible for variation in activation energy in CaCu 3 Ti 4 O 12 -0.5CuAl 2 O 4 composites, while the integrated action of a strong solid solution effect and weak Sr-stretching effect contributed to the elevated potential barrier height and enhanced breakdown field in 0.4SrCu 3 Ti 4 O 12 -0.6CaCu 3 Ti 4 O 12 composites.

Suggested Citation

  • Zhuang Tang & Kangning Wu & Yuwei Huang & Jianying Li, 2017. "High Breakdown Field CaCu 3 Ti 4 O 12 Ceramics: Roles of the Secondary Phase and of Sr Doping," Energies, MDPI, vol. 10(7), pages 1-10, July.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:7:p:1031-:d:105154
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/10/7/1031/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1996-1073/10/7/1031/
    Download Restriction: no
    ---><---

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jeners:v:10:y:2017:i:7:p:1031-:d:105154. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.