Non-stoichiometry in "CaCu3Ti4O12" (CCTO) ceramics

被引：103
|
作者：
Schmidt, Rainer [1 ]
Pandey, Shubhra [2 ,3 ]
Fiorenza, Patrick [4 ]
Sinclair, Derek C. [2 ]
机构：
[1] Univ Complutense Madrid, Fac Ciencias Fis, Dept Fis Aplicada 3, GFMC, E-28040 Madrid, Spain
[2] Univ Sheffield, Sheffield S1 3JD, S Yorkshire, England
[3] Indian Inst Technol, Dept Mat Sci & Engn, Kanpur 208016, Uttar Pradesh, India
[4] CNR, IMM, I-95121 Catania, Italy
来源：
RSC ADVANCES | 2013年 / 3卷 / 34期
基金：
英国工程与自然科学研究理事会;
关键词：
GIANT DIELECTRIC-CONSTANT; EFFECTIVE IONIC-RADII; OXIDES;
D O I：
10.1039/c3ra41319e
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A combined powder X-ray lattice parameter and ceramic impedance spectroscopy study is presented on materials within the CaO-CuO-TiO2 ternary phase diagram. Several compositions containing CaCu3Ti4O12 (CCTO) and small amounts of secondary phases such as TiO2, CaTiO3 and CuO are analysed and two different defect mechanisms are identified as the cause of the non-stoichiometry in CCTO. The first mechanism involves a variation in the Cu content, which explains the large differences in the intrinsic bulk and extrinsic grain boundary (GB) resistance, and the formation of the ceramic internal barrier layer capacitor (IBLC) structure. The second mechanism is associated with Ca-Cu anti-site disorder causing an unusually high intrinsic bulk permittivity above that predicted from Clausius-Mossotti calculations.
引用
收藏
页码：14580 / 14589
页数：10
相关论文
共 50 条
  • [21] Effects of cation stoichiometry on the dielectric properties of CaCu3Ti4O12
    Kwon, Seunghwa
    Huang, Chien-Chih
    Subramanian, M. A.
    Cann, David P.
    JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 473 (1-2) : 433 - 436
  • [22] Role of mixing mediums in the synthesis of single phase CaCu3Ti4O12 (CCTO)
    Zaman, Rosyaini Afindi
    Ali, Wan Fahmin Faiz Wan
    Abu, Mohamad Johari
    Mohamed, Julie Juliewatty
    Ain, Mohd Fadzil
    Ahmad, Zainal Arifin
    JOURNAL OF CERAMIC PROCESSING RESEARCH, 2016, 17 (06): : 626 - 631
  • [23] Dielectric properties of CaCu3Ti4O12 (CCTO) doped with GeO2
    Amaral, F.
    Valente, M. A.
    Costa, L. C.
    JOURNAL OF NON-CRYSTALLINE SOLIDS, 2010, 356 (11-17) : 822 - 827
  • [24] A novel technique for the synthesis of CaCu3Ti4O12 ceramics
    Sen, S.
    Sahu, P.
    Prasad, K.
    MATERIALS SCIENCE-POLAND, 2010, 28 (01): : 265 - 271
  • [25] Microstructure and electrical properties of CaCu3Ti4O12 ceramics
    Shao, S. F.
    Zhang, J. L.
    Zheng, P.
    Zhong, W. L.
    Wang, C. L.
    JOURNAL OF APPLIED PHYSICS, 2006, 99 (08)
  • [26] Nanoscale electromechanical properties of CaCu3Ti4O12 ceramics
    Tararam, R.
    Bdikin, I. K.
    Panwar, N.
    Varela, J. A.
    Bueno, P. R.
    Kholkin, A. L.
    JOURNAL OF APPLIED PHYSICS, 2011, 110 (05)
  • [27] Effect of organic flux on the colossal dielectric constant of CaCu3Ti4O12 (CCTO)
    Razdan, Vishnu
    Singh, Abhishek
    Arnold, Bradley
    Choa, Fow-Sen
    Kelly, Lisa
    Singh, N. B.
    ENERGY HARVESTING AND STORAGE: MATERIALS, DEVICES, AND APPLICATIONS VI, 2015, 9493
  • [28] EFFECT OF DOPANTS AND PROCESSING ON THE MICROSTRUCTURE AND DIELECTRIC PROPERTIES OF CaCu3Ti4O12 (CCTO)
    Bender, B.
    Pan, M.
    ADVANCES IN ELECTROCERAMIC MATERIALS, 2009, 204 : 187 - 197
  • [29] Dielectric properties of nanocrystalline CaCu3Ti4O12 (CCTO) ceramics fabricated from Algerian limestone raw material
    Djafar, R.
    Fasquelle, D.
    Chaouchi, A.
    Sedda, K.
    Bououdina, M.
    Bellucci, S.
    Banhegyi, G.
    MATERIALS CHEMISTRY AND PHYSICS, 2023, 301
  • [30] Effects of sintering temperature on the internal barrier layer capacitor (IBLC) structure in CaCu3Ti4O12 (CCTO) ceramics
    Schmidt, Rainer
    Stennett, Martin C.
    Hyatt, Neil C.
    Pokorny, Jan
    Prado-Gonjal, Jesus
    Li, Ming
    Sinclair, Derek C.
    JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2012, 32 (12) : 3313 - 3323
12345