Abstract
Orthorhombic Ba(Ti 0.94 Zr 0.06 )O₃ single crystals are fabricated using the cost-effective solid-state single crystal growth (SSCG) method; their dielectric and piezoelectric properties are also characterized. Measurements show that (001) Ba(Ti 0.94 Zr 0.06 )O₃ single crystals have an electromechanical coupling factor (k 33 ) higher than 0.83, piezoelectric charge constant (d 33 ) of about 400 [pC/N], and piezoelectric voltage constant (g 33 ) higher than 50 [x10 -3 Vm/N]. The transition temperature (TOT) of the (001) Ba(Ti 0.94 Zr 0.06 )O₃ single crystals between orthorhombic and tetragonal phases is also observed to be about 61℃. Because their electromechanical coupling factor (k 33 ) and piezoelectric voltage constant (g 33 ) are higher than those of soft PZT ceramics, it is expected that (001) Ba (Ti 0.94 Zr 0.06 )O₃ single crystals can be used as “lead-free” piezoelectric materials in many piezoelectric applications.
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