Referenced Items are not available for this document.
Lead titanate (PT) ceramics co-doped with 8 to 13 mol% Ni-Nb, by substituting titanium ions, were prepared by conventional ceramic method and the influence of Ni-Nb doping level on their mopho-structural, electromechanical and dielectric properties was investigated. Dense tetragonal PT ceramics were obtained for 8 to 12 mol% Ni-Nb co-doping. Lattice anisotropy decreased from 1.053 to 1.046 with increasing doping level. Large thickness coupling factors of 0.4 were obtained for 8, 11, and 12 mol% Ni-Nb. Large electromechanical anisotropy of 10 was obtained for 8 mol% Ni-Nb. It was found that Ni-Nb co-doping has both softening and hardening effects as a function of donor or acceptor behavior of different amounts of Ni-Nb. For 13 mol% Ni-Nb, segregation of a small amount of a secondary phase occurs, lattice constants and tetragonality significantly decrease and the resulting ceramic becomes very hard.
Published in:
Ultrasonics, Ferroelectrics and Frequency Control, IEEE Transactions on
(Volume:56
,
Issue:
9
)
Date of Publication: September 2009
- Page(s):
- 1792 - 1798
- ISSN :
- 0885-3010
- INSPEC Accession Number:
- 10917985
- Digital Object Identifier :
- 10.1109/TUFFC.2009.1251
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 06 October 2009
- Issue Date :
- September 2009
- Sponsored by :
- IEEE Ultrasonics, Ferroelectrics, and Frequency Control Society
- PubMed ID :
- 19811978
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