Skip to main content

Synthesis, Structural, and Electrical Properties of Ca-Modified Ba2TiSi2O8 Ceramics

Buy Article:

$51.00 plus tax (Refund Policy)

Abstract:

Polycrystalline ceramic samples of calcium (Ca2+)-doped barium titanium silicate mineral (fresnoite) of general formula Ba2−XCaXTiSi2O8, have been prepared by a standard solid-state reaction method using high-purity oxides and carbonates. The formation of the single-phase compound and its structural parameters were investigated by X-ray diffraction (XRD) followed by Rietveld refinement and scanning electron microscopic techniques. A better agreement between the observed and calculated XRD patterns was obtained by performing the Rietveld refinement with a structural model using the noncentrosymmetric space group P4bm. A better agreement between observed and calculated d-values also show that the lattice parameters calculated using the Rietveld refinement analysis are better than that of the earlier report so far. The activation energies of the compounds were calculated by measuring their dc electrical conductivities. The activation energy obtained for the pure compound is very high (4.74 eV), which decreases with the increase of doping concentrations. The frequency and temperature-dependent dielectric behavior of the compound has been studied. The results are discussed in detail.

Document Type: Research Article

DOI: https://doi.org/10.1111/j.1551-2916.2010.04187.x

Affiliations: Department of Physics, M. L. Sukhadia University, Udaipur-313002, Rajasthan, India

Publication date: 2011-03-01

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more