Lead scandium tantalate

Lead scandium tantalate (PST) is a mixed oxide of lead, scandium, and tantalum. It has the formula Pb(Sc_0.5Ta_0.5)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]