Influence of Calcined Temperature on the Piezoelectric Properties of (Na_0.48K_0.47Li_0.05)NbO₃ Lead-Free Piezoelectric Ceramics Doped with CuO

Abstract:

Na_0.48K_0.47Li_0.05)NbO₃(NKLN)Lead-free piezoelectric ceramics doped with CuO were prepared by traditional solid-state reaction method. Influence of calcined temperature on the material phase of NKLN lead-free piezoelectric ceramics doped with CuO by X-ray diffraction (XRD) and the influence of calcined temperature and sintered temperature on the properties of NKLN lead-free piezoelectric ceramics doped with CuO by others analysis method. The results show that the best calcined temperature is got, when calcined temperature is up to 850 °C, the mixed phase disappeares, a single phase perovskites structure is formed. With the increase of calcined temperature, piezoelectric strain constant (d₃₃) planar electromechanical coupling factor (K_p) of NKLN lead-free piezoelectric ceramics increase first and then decrease, while only dielectric loss (tanδ) decreases first and then increases.The best calcined temperature is 850 °C, the best sintered temperature is 1080 °C, the NKLN lead-free piezoelectric ceramics doped with CuO with good comprehensive properties are obtained, whose d₃₃ , K_p , tanδ are 85 pC/N, 0.3, 0.038, respectively.

• Periodical: Advanced Materials Research (Volumes 760-762)
• Pages: 763-766
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.760-762.763
• Online since: September 2013
• Authors: Xin You Huang, Mu Sheng Huang, Chun Hua Gao
• Keywords: Calcined Temperature, CuO Doped, Lead-Free Piezoelectric Ceramics, Lithium Sodium Potassium Niobate

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