We now combine the calculated electrical-transport properties with the κ latt to predict the thermoelectric figure of merit ZT as a function of doping level and temperature using Eq. 1 (Figure ). We summarise the minimal temperatures and n for which ZT > 1, and the corresponding transport properties, in Table , together with the predicted ZT max at T = 400, 600 and 1000 K corresponding roughly to the low-mid-and high-temperature recovery scenarios in Ref. . We predict that the industry-standard ZT = 1 can be achieved for CTO and STO at 1480 K, with n = 10 21 and 7.5 × 10 20 cm -3 , respectively. (We also predict that ZT > 1 can be obtained with a smaller n = 5 × 10 20 cm -3 at higher temperatures of 1650 and 1560 K.) On the other hand, we predict BTO can achieve a maximum ZT of just 0.35 at the largest n = 10 22 cm -3 and T = 1800 K we studied.