Influence of attrition milling on the electrical properties of undoped-BaTiO3

THAKUR, O.P., FETEIRA, Antonio, KUNDYS, B. and SINCLAIR, D.C. (2007). Influence of attrition milling on the electrical properties of undoped-BaTiO3. Journal of the European Ceramic Society, 27 (7), 2577-2589.

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Official URL: http://dx.doi.org/10.1016/j.jeurceramsoc.2006.10.0...
Link to published version:: 10.1016/j.jeurceramsoc.2006.10.013

Abstract

Undoped-BaTiO3 powder prepared from the mixed oxide route (0 h sample) has been attrition milled using yttria-stabilized ZrO2 milling media for 0.5–3 h prior to formation of dense ceramics. Both isovalent (Zr4+ → Ti4+) and aliovalent (Y3+ → Ba2+) dopant contamination effects have been observed. Systematic changes occur in the lattice parameters, polymorphic phase transition temperatures and dielectric properties below the Curie temperature for 0–2 h attrition milled powders and these are attributed primarily to an ion-size effect associated with Zr-doping on the Ti-site due to milling media contamination. The bulk conductivity of attrition milled samples at high temperature decreases by ∼2–3 orders of magnitude compared to 0 h samples and the activation energy associated with bulk conduction increases from ∼1 eV for 0 and 0.5 h samples to 1.4 eV for 3 h samples. The change in bulk conductivity and conduction mechanism for the attrition milled samples is attributed to aliovalent Y3+ dopant contamination from the milling media.

Item Type: Article
Research Institute, Centre or Group: Materials and Engineering Research Institute > Structural Materials and Integrity Research Centre > Centre for Corrosion Technology
Identification Number: 10.1016/j.jeurceramsoc.2006.10.013
Depositing User: Hilary Ridgway
Date Deposited: 06 Jun 2012 16:25
Last Modified: 06 Jun 2012 16:25
URI: http://shura.shu.ac.uk/id/eprint/5337

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