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XRD patterns of BNT- in range of 20°–70°. The asterisk indicates a superstructure peak, which characterizes the space group of .
Temperature dependences of poled and unpoled dielectric constants and loss tangents (10 kHz–1 MHz) in temperature range of RT- .
Phase transition temperatures , , and of BNT- .
hysteresis loops at (a) RT and (b) , and (c) saturation properties of for BNT-BAS5.
Field-induced strain of BNT- , (b) 0.045, (c) 0.05, and (d) 0.06.
Compositional dependences of (a) electromechanical coupling factor , unpoled dielectric constant (1 kHz), and free permittivity , and (b) piezoelectric constant and normalized strain for BNT- .
in ( : end member) (mole function of BNT) vs end member tolerance factor for BNT-based systems. End members are (a) BAS, (b) BT, (c) KN, [(d) and (e)] , (f) , (g) BKT-BT, (h) BKT, (i) PT, [(j) and (k)] -BKT, and (l) ST.
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