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Journal of Polymer & Composites Original Research

Dielectric Studies of 0.5Ba0.8Ca0.2TiO3.0.5CaCu3Ti4O12 Nanoceramic Fabricated by Chemo-mechanical Process

  1. Gajendra Singh Lodhi School of Basic and Applied Sciences, Shobhit Institute of Engineering and Technology (Deemed-to-be-University), Meerut
  2. Jyoti Sharma School of Basic and Applied Sciences, Shobhit Institute of Engineering and Technology (Deemed-to-be-University), Meerut
  3. Jayanta Kumar Mahato School of Engineering and Technology, Shobhit Institute of Engineering and Technology (Deemed-to-be-University), Meerut
  4. Laxman Singh Department of chemistry, Siddharth University, Kapilvastu, Siddharth Nagar
  5. Atendra Kumar Department of Chemistry, Simdega College, Simdega (A constituent unit of Ranchi University)

Abstract

The present investigation is aimed toward investigate a straightforward, inexpensive, and environmentally friendly chemo-mechanical method for preparing high-dielectric materials, specifically 0.5Ba0.8Ca0.2TiO3.0.5CaCu3Ti4O12 (BCT-CCTO), by combining metal nitrate combustion with solid TiO2 powder and titanium isopropoxide, Ti (OR)4. The composite was prepared by the mixing of individual materials of Ba0.8Ca0.2TiO3 and CaCu3Ti4O12 through the chemo-mechanical method. Initially, 99% pure Ba (NO3)3, Cu (NO3)2∙3H2O, TiO2 and glycine were taken in their stoichiometry ratios. The composites were further sintered at 950ºC and 1000°C for 15 hrs. The presence of a major peak in BCT-CCTO composite at 1000°C 15 hrs. was investigated in the X-ray diffraction analysis which clearly confirmed the phase formation of BCT-CCTO composite. The surface morphology, the elemental homogenous composition of the element as a specific portion, and the electronic state of the metal ions of the BCT-CCTO composite were confirmed through SEM, EDX mapping, and XPS spectra respectively. It is observed that bimodal type of grain morphologies of several hundreds of nanometers are formed in the composites. It is also confirmed from TEM observation that the presence of spherical and homogenous-sized particles which resemble platelets of BCT-CCTO composite materials. Moreover, the results obtained at certain frequencies and temperatures are detailed in dielectric relaxation processes and because of interfacial polarization, a high dielectric constant was seen at low frequencies and high temperatures.

Keywords

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