Enhancement of Qm in CuO-doped compositionally optimized Li/Ta-modified (Na,K)NbO3 lead-free piezoceramics
Source abstract
Abstract
Abstract The effects of CuO on electrical properties of compositionally optimized Li/Ta-modified (Na,K)NbO3 (LT-KNN) piezoceramics were studied to develop LT-KNN with high mechanical quality factor Qm and low dielectric loss tg δ as well as relatively high piezoelectric constant d33 for actuator applications. Both “hard” and “soft” effects were observed due to CuO addition, and the discussion related to high Li doping amount was presented to explain this phenomenon. By increasing CuO addition, the d33 gradually decreases while the Qm increases significantly. Particularly, tg δ at 1 kHz can be reduced from ∼2.7% for LT-KNN ceramics to ∼0.8% for CuO-added LT-KNN ceramics. When the CuO addition is lower than 1 mol%, both high Qm (∼323) and relatively high d33 (>180 pC/N) can be obtained, in addition to a relatively high dielectric constant ɛr ∼ 500.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Acoustic Wave Resonator Technologies · Dielectric materials and actuators
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (14)
Show source-provided references
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