High power characterization of (Na0.5K0.5)NbO 3 based lead-free piezoelectric ceramics

E. A. Gurdal, S. O. Ural, H. Y. Park, Sahn Nahm, K. Uchino

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Though there is a lot of research related with lead-free piezoelectric materials, there are quite few research on high power characteristics of the lead-free piezoelectric materials. Especially under equilibrium conditions (continuous drive), high power characteristics in resonance and anti-resonance regions still remain unrevealed. This study investigates the high power characteristics of a sodium-potassium-niobate (NKN) based piezoelectric ceramic compared to hard lead-zirconate-titanate (PZT) under equilibrium conditions. High power characteristics were investigated with our novel high power piezoelectric characterization system (HiPoCS). (Na0.5K 0.5)(Nb0.97Sb0.03)O3 was prepared with 1.5% mol CuO addition with the mixed-oxides method. Disk-shaped samples were sintered with the conventional sintering methods. The mechanical quality factor (Qm) at resonance (Qa) did not possess degradation with the increasing vibration velocity (vrms). Accordingly, it remained constant up to 0.4 m/s, which corresponds to the maximum vibration velocity (vrms measured with 20 °C increase of the temperature on the nodal point). This behavior is superior when compared to hard-PZTs with their sharp decrease in Qa with the increasing vibration velocity. At anti-resonance, the high power behavior trend was similar to that of at resonance. The mechanical quality factor at anti-resonance (QB) also remained constant up to the maximum vibration velocity (vmax = 0.4m/s). Moreover, Qa and QB were in the same order up to vmax. This trend is also distinctly different than hard-PZTs and needs to be further investigated. In conclusion, NKN ceramics are capable of possessing good high power behavior at both resonance and anti-resonance modes.

Original languageEnglish
Pages (from-to)44-46
Number of pages3
JournalSensors and Actuators, A: Physical
Volume200
DOIs
Publication statusPublished - 2013 Jan 1

Fingerprint

Piezoelectric ceramics
piezoelectric ceramics
Lead
vibration
Piezoelectric materials
Q factors
trends
niobates
mixed oxides
Oxides
Vibrations (mechanical)
Potassium
potassium
sintering
Sintering
Sodium
sodium
ceramics
degradation
Degradation

Keywords

  • High power
  • Lead-free
  • Losses
  • NKN(KNN)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials
  • Metals and Alloys
  • Surfaces, Coatings and Films
  • Instrumentation

Cite this

High power characterization of (Na0.5K0.5)NbO 3 based lead-free piezoelectric ceramics. / Gurdal, E. A.; Ural, S. O.; Park, H. Y.; Nahm, Sahn; Uchino, K.

In: Sensors and Actuators, A: Physical, Vol. 200, 01.01.2013, p. 44-46.

Research output: Contribution to journalArticle

Gurdal, E. A. ; Ural, S. O. ; Park, H. Y. ; Nahm, Sahn ; Uchino, K. / High power characterization of (Na0.5K0.5)NbO 3 based lead-free piezoelectric ceramics. In: Sensors and Actuators, A: Physical. 2013 ; Vol. 200. pp. 44-46.
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