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Table 1 Electromechanical coupling factors (kij) and mechanical quality factors (Qm) of SxByT(x=0. 8, y=0. 2) ceramics compared with those of the other BLSFs. Compounds kp (%) k31 (%) Qm Ref. Sr0. 8Bi2. 2Ta2O9 9. 7 6. 1 4500 This study Na0. 5Bi2. 5Ta2O9 10. 0 6. 1 3000.
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