Crystallographic Evolution, Dielectric, and Piezoelectric Properties of Bi4Ti3O12:W/Cr Ceramics

  1. Jungang Hou1,2,
  2. Yuanfang Qu1,
  3. Rahul Vaish2,3,
  4. K. B. R. Varma3,
  5. Dalibor Krsmanovic2,
  6. R. Vasant Kumar2,*

Article first published online: 19 FEB 2010

DOI: 10.1111/j.1551-2916.2009.03582.x

Issue

Journal of the American Ceramic Society

Journal of the American Ceramic Society

Volume 93, Issue 5, pages 1414–1421, May 2010

Additional Information

How to Cite

Hou, J., Qu, Y., Vaish, R., Varma, K. B. R., Krsmanovic, D. and Kumar, R. V. (2010), Crystallographic Evolution, Dielectric, and Piezoelectric Properties of Bi4Ti3O12:W/Cr Ceramics. Journal of the American Ceramic Society, 93: 1414–1421. doi: 10.1111/j.1551-2916.2009.03582.x

Author Information

  1. 1

    Key Laboratory for Advanced Ceramic and Machining Technology of Ministry of Education, Tianjin University, Tianjin, 300072, China

  2. 2

    Department of Materials Science and Metallurgy, University of Cambridge, Cambridge CB2 3QZ, U.K.

  3. 3

    Materials Research Centre, Indian Institute of Science, Bangalore-560 012, India

*†Author to whom correspondence should be addressed. e-mail: rvk10@cam.ac.uk

  1. S. Priya—contributing editor

Publication History

  1. Issue published online: 26 APR 2010
  2. Article first published online: 19 FEB 2010
  3. Manuscript No. 26542. Received July 15, 2009; approved December 2, 2009.

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W/Cr codoped Bi4Ti3O12 ceramics, Bi4Ti3−xWxO12+x+0.2 wt%Cr2O3 (BITWC, x=0–0.15), were prepared using a solid-state reaction method. The crystallographic evolution and phase analysis were distinctly determined focusing on the X-ray diffraction peak changes in (020)/(200) and (220)/(1115) diffraction planes, by which the lattice parameters, a, b, and c can be refined. The thermal variations of permittivity, dielectric loss (tan δ), impedance, and electrical conductivity properties were characterized. A decrease in the values of Curie temperature from 675° to 640°C and an increase in the values of the dielectric constant due to an increase of W6+/Cr3+ content were observed. The highest piezoelectric constant, d33 of 22 pC/N, was achieved with the composition of Bi4Ti2.975W0.025O12.025+0.2 wt% Cr2O3. Also, this composition had a lower electrical conductivity than the other investigated compositions.

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