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Research Paper | Material Science and Engineering | India | Volume 3 Issue 9, September 2014

Dielectric Relaxor Behaviour of (Ba0.77Ca0.23)TiO3 Ceramic Due to the Effect of Pr3+ Doping on the B-Site Lattice

A. Moquim | Manas R. Panigrahi

Abstract: BaTiO3 is the earliest known high dielectric constant material. The ability of this material to form solid solutions with different dopants (both iso and alio valent) makes it versatile for various applications. In this present study, BaTiO3 is first modified with Ca2+ and then end material is modified with Pr3+ at the B site lattice. Here it is tried to search for new lead-free ferroelectric material and improve their properties. For this purpose, the barium calcium titanate (BCT) as a host and the rare earth element Pr3+as an activator were used to fabricate a multifunctional material. The end material is found to be in a single phase and the morphology says they are homogeneous and dense, also there is no evidence of secondary phase from the ceramograph. Lastly, the dielectric study is carried out and observed that, Tc increases to 320.5 C and observed to be a relaxor ferroelectric. Here in this paper, some structural parameters and dielectric constants of praseodymium modified barium (calcium) titanate ceramics is presented.

Keywords: Structure, Rietveld analysis, Relaxor ferroelectric, Dielectric constants

Edition: Volume 3 Issue 9, September 2014,

Pages: 2223 - 2227