Abstract
Heat dissipation and ultra-low mechanical loss are important characteristics of advanced miniaturized and intelligent electronic devices. Herein, novel 0.86PZT-0.05PMS-0.09PMT + x mol%Al2O3 piezoelectric ceramics were prepared by solid-phase sintering method. The properties and structural variations of the resulting ceramics were systematically investigated by various analytical techniques. The results suggested excellent comprehensive performances of ceramics obtained at x = 0.6 mol%, with d33 = 340 pC/N, kp = 0.507, Qm = 2117, TC = 249.8 °C, and εr = 1473. The properties of the ceramics can be optimized by different defect dipoles induced by different Al3+ ion contents occupying the A-site and B-site. In addition, the promotion of domain changes within the lattice and the introduction of polar nano-regions by doping ions, decreased the lowering and redistribution of energy barriers. Overall, the excellent performance and ultra-high Qm of the proposed ceramics look promising for future construction of miniaturized devices.
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