Effect of CaO Dopant on the Dielectric Properties of NiO

Abstract:

Ca_xNi_1-xO was prepared by conventional solid state reaction. The properties of undoped and CaO doped NiO ceramics have been studied. The raw mixture of CaO and NiO were ball milled for 24 hours. The samples were calcined at 1000°C for 2 hours, pressed into pellet shape at 200 MPa and sintered at 1300°C for 4 hours. The sintered samples were subjected to XRD, Scanning Electron Microscopy (SEM) and Impedance Analyzer for phase identification, microstructural observation and dielectric analysis. The grains size becomes larger with the increment of dopant amount. Enhanced dielectric constant was observed for all Ca doped NiO at the frequency range from 100 Hz to 1 MHz. The dielectric constant of sintered Ca_xNi_1-xO decreased with an increasing frequency. The result indicates that Ca ions have effectively changed the properties of NiO.

• Periodical: Advanced Materials Research (Volume 789)
• Pages: 138-142
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.789.138
• Online since: September 2013
• Authors: Sharifah Aishah Syed Salim, Julie Juliewatty Mohamed, Zainal Arifin Ahmad
• Keywords: Ca-Doped NiO, Dielectric, SEM, X-Ray Diffraction (XRD)

References

[1] J. Wu, C. W. Nan, Y. Lin and Y. Deng, Giant dielectric permittivity observed in Li and Ti doped NiO, Physical Review Letters., vol. 89, no. 21, p.27601(1)-27601(4), July. (2002).

DOI: 10.1103/physrevlett.89.217601

[2] S. Maensiri, P. Thongbai, and T. Yamwon, Giant dielectric response in (Li, Ti)-doped NiO ceramics synthesized by the polymerized complex method, Journal Acta Materialia. Vol. 55, pp.2851-2861.

DOI: 10.1016/j.actamat.2006.12.024

[3] T. Fujii, H. Sato, S. Ito and G. L. Messing, Crystal structure and dielectric properties of complex perovskite (Sr, Ba, Ca) (Ni0. 5W0. 5)O3, Solid State Ionics., vol. 172, pp.458-489, Jan. (2004).

DOI: 10.1016/j.ssi.2004.01.050

[4] J. Wu, J. Nan, C. W. Nan, Y. Deng, Y. Lin and S. Zhao, Preparation and transport properties of Li-Doped NiO and (Li + Ca)- Doped NiO Oxides, phys. Stat. sol., vol. 193, no. 1, pp.78-85, April. (2002).

DOI: 10.1002/1521-396x(200209)193:1<78::aid-pssa78>3.0.co;2-8

[5] X. M. Chen, T. Wang and J. Li, Dielectric characteristics and their field dependence of (Ba, Ca)TiO3 ceramics, Materials Science and Engineering., vol. 113, pp.117-120, April. (2004).

DOI: 10.1016/j.mseb.2004.04.003

[6] Z. B. Ayadi, L. El. Mir, J. El. Ghoul, K. Djessas and S. Alaya Structural and optical properties of calcium doped zinc oxide sputtered from nanopowder target materials, Int.J. Nanoelectronic and Materials., vol. 3, pp.87-97, (2010).

DOI: 10.1088/0957-4484/18/44/445702

[7] J. L. Wang, Z. C. Li, B. Xiong, L. Xie, L. J. Yuan and J. T. Sun. Synthesis and Electrochemical Property of Calcium Doped LiNi0. 8Co0. 2O2 Solid Solution., Chinese Chemical Letters., vol. 14, no. 12, pp.1303-1305, (2003).

[87] K. Chen, S.K. Yuan, P.L. Li, F. Gao, J. Liu, G.L. Li, A.G. Zhao, X.M. Lu, J.M. Liu and J.S. Zhu: Journal Applied Physics. Vol. 102 (2007), p.034103.

[98] B. Gokul, P. Matheswaran, K. M. Abhirami, R. Sathyamoorthy, Structural and dielectric properties of NiO nanoparticle, Journal of Noncrystalline Solids., vol. 363, no 1, pp.161-166, March (2013).

DOI: 10.1016/j.jnoncrysol.2012.12.007

[109] P. S. Anjana, M. T. Sebastian, A. Axelsson, and N. M. Alford, Microwave dielectric properties of CeO2- 0. 5AO- 0. 5 TiO2 (A= Ca, Mg, Zn, Mn, Co, Ni, W) ceramics, Journal of the European ceramic society., vol. 27, pp.3445-3452, Oct (2007).

DOI: 10.1016/j.jeurceramsoc.2007.01.009

[110] L. Cieniek, J. Kusinski, G. P. Ervasi and C. Petot, Microstructured and high temperature transport properties of Ca- doped nickel oxide, Journal of Microscopy., vol. 237, no. 3, pp.329-332, March (2009).

DOI: 10.1111/j.1365-2818.2009.03253.x

[121] T. B. Adams, D. C. Sinclair, and A. R. West: Nanoscale electromechanical properties of CaCu3Ti4O12 ceramics, Journal Phys. Rev. B., vol. 73, p.1, (2006).