Chemistry: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,[1] 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.[2] It is ferroelectric at temperatures below 270 K (−3 °C; 26 °F),[2] and is also piezoelectric.[3] 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.[4]
References
- ↑ 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.
- ↑ 2.0 2.1 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.
- ↑ 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. doi:10.1080/10584580108016902. Bibcode: 2001InFer..35..209D.
- ↑ 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. Materials for Infrared Detectors II. 4795. pp. 88. doi:10.1117/12.452244.
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