Addition of a Sr, K, Nb (SKN) combination to PZT(53/47) for high strain applications

Niall J. Donnelly, Thomas R. Shrout, Clive A. Randall

Research output: Contribution to journalArticle

63 Citations (Scopus)

Abstract

A lead zirconate titanate composition incorporating the dopants Sr, K, and Nb (SKN) in the specific ratio 4:1:3 has been studied. In principle, the SKN should act as a donor dopant but since its addition reduced the grain size from 11.4 μm (for 1% SKN) to 1.5 μm (for 5% SKN), the overall effect was found to be more complicated. It was observed that the addition of SKN reduced the Curie temperature, by 16°C/mol (%) and broadened the dielectric peak. X-ray measurements further suggested that the ceramic was a mixture of rhombohedral and tetragonal phases and that the room temperature c/a ratio of the tetragonal phase decreased with SKN addition. The piezoelectric coefficient d33, determined from high field unipolar drives, gave an optimum value of 779 pm/V for the 0.02 SKN compositions, which also exhibited a relatively high Curie temperature of 356°C. Competing effects of enhanced domain wall mobility from donor doping and reduced mobility due to smaller grain size may explain the observed compositional variation in the measured material properties. Materials based on this composition are attractive for high performance piezoelectric actuator applications such as fuel injection.

Original languageEnglish (US)
Pages (from-to)490-491
Number of pages2
JournalJournal of the American Ceramic Society
Volume90
Issue number2
DOIs
StatePublished - Feb 1 2007

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Doping (additives)
Curie temperature
Chemical analysis
Piezoelectric actuators
Domain walls
Fuel injection
Materials properties
X rays
Temperature
lead titanate zirconate

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites

Cite this

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title = "Addition of a Sr, K, Nb (SKN) combination to PZT(53/47) for high strain applications",
abstract = "A lead zirconate titanate composition incorporating the dopants Sr, K, and Nb (SKN) in the specific ratio 4:1:3 has been studied. In principle, the SKN should act as a donor dopant but since its addition reduced the grain size from 11.4 μm (for 1{\%} SKN) to 1.5 μm (for 5{\%} SKN), the overall effect was found to be more complicated. It was observed that the addition of SKN reduced the Curie temperature, by 16°C/mol ({\%}) and broadened the dielectric peak. X-ray measurements further suggested that the ceramic was a mixture of rhombohedral and tetragonal phases and that the room temperature c/a ratio of the tetragonal phase decreased with SKN addition. The piezoelectric coefficient d33, determined from high field unipolar drives, gave an optimum value of 779 pm/V for the 0.02 SKN compositions, which also exhibited a relatively high Curie temperature of 356°C. Competing effects of enhanced domain wall mobility from donor doping and reduced mobility due to smaller grain size may explain the observed compositional variation in the measured material properties. Materials based on this composition are attractive for high performance piezoelectric actuator applications such as fuel injection.",
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Addition of a Sr, K, Nb (SKN) combination to PZT(53/47) for high strain applications. / Donnelly, Niall J.; Shrout, Thomas R.; Randall, Clive A.

In: Journal of the American Ceramic Society, Vol. 90, No. 2, 01.02.2007, p. 490-491.

Research output: Contribution to journalArticle

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