Influence of Nb5+ions on the dielectric properties of CaCu3Ti4O12 ceramics

被引：0
作者：
Haque, M. Ehthishamul [1 ,4 ]
Divya, S. [1 ,4 ]
Lims, S. Cathrin [1 ,4 ]
Robert, R. [2 ]
Raj, C. Justin [3 ]
Jose, M. [1 ,4 ]
机构：
[1] Sacred Heart Coll Autonomous, Dept Phys, Tirupattur 635601, India
[2] Govt Arts Coll Men, Dept Phys, Krishnagiri 635001, Tamilnadu, India
[3] VIT Univ, Sch Adv Sci, Phys Div, Chennai 600127, India
[4] Thiruvalluvar Univ, Vellore 632115, India
来源：
MATERIALS RESEARCH BULLETIN | 2025年 / 188卷
关键词：
Sol-gel process; Rietveld refinement; Microstructure; Giant dielectric constant; CALCIUM COPPER TITANATE; IMPEDANCE SPECTROSCOPY; ELECTRICAL-PROPERTIES; NONOHMIC PROPERTIES; TEMPERATURE; MICROSTRUCTURE; BEHAVIOR; OXIDE;
D O I：
10.1016/j.materresbull.2025.113405
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this work, Nb5+ doped CCTO ceramic with high dielectric constant (epsilon r) and a very low dielectric loss (tans) is reported. Powder XRD analysis confirmed the cubic perovskite structure and the Rietveld profile shows the goodness of fit below 2. The XPS analysis confirmed the presence of Ca 2p, La 3d, Cu 2p, Ti 2p, O 1 s, and C 1 s, all of which exhibited their expected oxidation states. The SEM micrographs revealed a grain size of 1.01 +/- 0.07 mu m for pure and 1.77 +/- 0.13 mu m for Nb5+doped CCTO. The Nb5+doped CCTO exhibited high epsilon r approximate to 1.26 x 105 at 50 Hz with low tans approximate to 0.85 at 1 kHz for 673 K in comparison with pure CCTO. The Nyquist plots established a deviation from Debye type relaxation with a negative temperature coefficient of resistance (NTCR) type behaviour.
引用
收藏
页数：11
相关论文
共 50 条
  • [31] Effect of Calcination Temperature on Dielectric Properties of CaCu3Ti4O12 Ceramics
    Ab Rahman, Mohd Fariz
    Abu, Mohamad Johari
    Ain, Mohd Fadzil
    Mohamed, Julie Juliewatty
    Ahmad, Zainal Arifin
    5TH INTERNATIONAL CONFERENCE ON RECENT ADVANCES IN MATERIALS, MINERALS AND ENVIRONMENT (RAMM) & 2ND INTERNATIONAL POSTGRADUATE CONFERENCE ON MATERIALS, MINERAL AND POLYMER (MAMIP), 2016, 19 : 910 - 915
  • [32] Giant dielectric response and low dielectric loss in Al2O3 grafted CaCu3Ti4O12 ceramics
    Rajabtabar-Darvishi, A.
    Bayati, R.
    Sheikhnejad-Bishe, O.
    Wang, L. D.
    Li, W. L.
    Sheng, J.
    Fei, W. D.
    JOURNAL OF APPLIED PHYSICS, 2015, 117 (09)
  • [33] Mechanical and dielectric properties of CaCu3Ti4O12 and La doped CaCu3Ti4O12 poly(vinylidene fluoride) composites
    Srivastava, Anshuman
    Maiti, Pralay
    Kumar, Devendra
    Parkash, Om
    COMPOSITES SCIENCE AND TECHNOLOGY, 2014, 93 : 83 - 89
  • [34] Dielectric properties of Poly(vinylidene fluoride)/CaCu3Ti4O12 composites
    Thomas, P.
    Varughese, K. T.
    Dwarakanath, K.
    Varma, K. B. R.
    COMPOSITES SCIENCE AND TECHNOLOGY, 2010, 70 (03) : 539 - 545
  • [35] Effect of NiO-doping on the microstructure and the dielectric properties of CaCu3Ti4O12 ceramics
    Li, Tao
    Chen, Jing
    Liu, Dewei
    Zhang, Zhixia
    Chen, Zhenping
    Li, Zhuoxin
    Cao, Xingzhong
    Wang, Baoyi
    CERAMICS INTERNATIONAL, 2014, 40 (07) : 9061 - 9067
  • [36] Magnetic and electric properties, ESR, XPS and NEXAFS spectroscopy of CaCu3Ti4O12 ceramics
    Zhuk, N. A.
    Nekipelov, S., V
    Sivkov, V. N.
    Sekushin, N. A.
    Lutoev, V. P.
    Makeev, B. A.
    Koroleva, A., V
    Fedorova, A., V
    Koksharova, L. A.
    Ignatova, M. M.
    Korolev, R., I
    CERAMICS INTERNATIONAL, 2020, 46 (13) : 21410 - 21420
  • [37] Effect of sintering conditions on microstructure and dielectric properties of CaCu3Ti4O12 (CCTO) ceramics
    Lohnert, Romy
    Schmidt, Rainer
    Topfer, Joerg
    JOURNAL OF ELECTROCERAMICS, 2015, 34 (04) : 241 - 248
  • [38] Effect of sintering conditions on microstructure and dielectric properties of CaCu3Ti4O12 (CCTO) ceramics
    Romy Löhnert
    Rainer Schmidt
    Jörg Töpfer
    Journal of Electroceramics, 2015, 34 : 241 - 248
  • [39] Selectivity of doping ions to effectively improve dielectric and non-ohmic properties of CaCu3Ti4O12 ceramics
    Vangchangyia, Somsack
    Yamwong, Teerapon
    Swatsitang, Ekaphan
    Thongbai, Prasit
    Maensiri, Santi
    CERAMICS INTERNATIONAL, 2013, 39 (07) : 8133 - 8139
  • [40] Improved dielectric properties in CaCu3Ti4O12 ceramics modified by TiO2
    Wang, X. W.
    Jia, P. B.
    Sun, L. Y.
    Zhang, B. H.
    Wang, X. E.
    Hu, Y. C.
    Shang, J.
    Zhang, Y. Y.
    JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, 2018, 29 (03) : 2244 - 2250
12345