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Lead scandium tantalate

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Lead scandium tantalate (PST) is a mixed oxide of lead, scandium, and tantalum. It has the formula Pb(Sc0.5Ta0.5)O3. It is a ceramic material with a perovskite structure, where the Sc and Ta atoms at the B site have an arrangement that is intermediate between ordered and disordered configurations, and can be fine-tuned with thermal treatment. It is ferroelectric at temperatures below 270 K (−3 °C; 26 °F), and is also piezoelectric. Like structurally similar lead zirconate titanate and barium strontium titanate, PST can be used for manufacture of uncooled focal plane array infrared imaging sensors for thermal cameras.

References

  1. Chu, Fan; Fox, Glen R.; Setter, Nava (21 January 2005). "Dielectric Properties of Complex Perovskite Lead Scandium Tantalate under dc Bias". Journal of the American Ceramic Society. 81 (6): 1577–1582. doi:10.1111/j.1151-2916.1998.tb02519.x.
  2. ^ Groves, P (10 December 1985). "Low-temperature studies of ferroelectric lead scandium tantalate". Journal of Physics C: Solid State Physics. 18 (34): L1073 – L1078. doi:10.1088/0022-3719/18/34/002.
  3. De Kroon, A. P.; Dunn, S. C.; Whatmore, R. W. (February 2001). "Piezo- and pyroelectric properties of lead scandium tantalate thin films". Integrated Ferroelectrics. 35 (1–4): 209–218. Bibcode:2001InFer..35..209D. doi:10.1080/10584580108016902. S2CID 98163109.
  4. Todd, Michael A.; Donohue, Paul P.; Watton, Rex; Williams, Dennis J.; Anthony, Carl J.; Blamire, Mark G. (1 December 2002). "High-performance ferroelectric and magnetoresistive materials for next-generation thermal detector arrays". In Longshore, Randolph E; Sivananthan, Sivalingam (eds.). Materials for Infrared Detectors II. Vol. 4795. p. 88. doi:10.1117/12.452244. S2CID 110191731.
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