Chemical Synthesis of Nanoparticles of Nickel-Cobalt Oxide and its Conductivity Studies

Nisha J. Tharayil¹, R. Raveendran² and Alexander Varghese Vaidyan²

1Department of Physics, Sree Narayana College, Kollam, Kerala (India)

2Department of Chemistry, St.Stephen?s College, Pathanapuram, Kerala (India)

DOI : http://dx.doi.org/10.13005/msri/040111

ABSTRACT:

Nano particles of nickel-cobalt oxide are prepared by chemical co-precipitation method by decomposition of their respective metal chlorides, sodium carbonate and EDTA. The average particle size is determined from X-ray line broadening and the diffractogram is compared with JCPDS data and the phase of the particle formed is determined and the shift in the D-value due to the nano nature is also analyzed. The nanoparticles formed have spinel structure. The effect of sintering temperature on the particle size is analyzed. The size of the particles is confirmed by TEM. The surface morphology is revealed by SEM image. EDS confirms the elements present in the sample. The low temperature dc conductivity studies of the sample were carried out and it was seen that the activation energy for the temperature range 100K-250K is 0.37ev and for the range 250K-350K is 0.62ev.The conductivity in the temperature range 275K-350K is much larger than the conductivity in the range 100K-250K. This value is much greater than the value reported for bulk nickel cobalt oxide (0.03 eV). It indicates the enhancement of conductivity in nanosized form of this material.

KEYWORDS: Nano particles; arrested precipitation; Calcination temperature TEM

Copy the following to cite this article: Tharayil N. J, Raveendran R, Vaidyan A. V. Chemical Synthesis of Nanoparticles of Nickel-Cobalt Oxide and its Conductivity Studies. Mat.Sci.Res.India;4(1)

Copy the following to cite this URL: Tharayil N. J, Raveendran R, Vaidyan A. V. Chemical Synthesis of Nanoparticles of Nickel-Cobalt Oxide and its Conductivity Studies. Mat.Sci.Res.India;4(1). Available from: http://www.materialsciencejournal.org/?p=1565

---

This work is licensed under a Creative Commons Attribution 4.0 International License.