Dy-doped (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3
([(Ba0.85Ca0.15)0.99Dy0.01](Zr0.1Ti0.9)O3, 0.01Dy-BCZT) lead-free
multifunctional ceramics were prepared by conventional solid-state sintering
method, in which the effects of ceramic processing conditions were studied
by structural analysis and performance characterization. The sintered
0.01Dy-BCZT ceramics have pure perovskite phase with composition near
morphotropic phase boundary alongside apparent tetragonal distortion, high
density and densified micro-morphology obtained via tailoring calcination
and sintering temperatures. High resistivity, excellent dielectric
performance and piezoelectricity were acquired, which were affected greatly
by ceramic processing conditions. All samples exhibit excellent
ferroelectric and strain properties, which approach intrinsic physical
performance and have little dependency on ceramic processing conditions.
Appearance of a strong broad emission peak, centred at ?442 nm, is related
to the 4F9/2 ? 6H15/2 electron transition. Strong piezoelectric-fluorescent
coupling effect was produced due to adding Dy and using BCZT piezoelectric
matrix, which provides a promising choice in optoelectronic application
field.