High Power (Na0.5K0.5)NbO3-based lead-free piezoelectric transformer

Erkan A. Gurdal, Seyit O. Ural, Hwi Yeol Park, Sahn Nahm, Kenji Uchino

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Though there is a lot of research related with lead-free piezoelectric materials, high power characteristics of the candidate lead-free materials have not been looked into in the literature under equilibrium conditions. This paper reports high power characteristics of a sodium potassium niobate (NKN) based ceramic under equilibrium conditions, and its application as a candidate material for piezoelectric transformers compared with hard lead-zirconate- titanate (PZT). (Na0.5K0.5)(Nb0.97Sb 0.03)O3 was prepared with 1.5 mol% CuO addition. Disk-shaped samples were sintered with conventional sintering methods. High power characteristics were investigated with our high power piezoelectric characterization system (HiPoCS). Distinctly different from PZTs, the NKN ceramics did not exhibit a decrease in mechanical quality factor (Qm) with increasing vibration velocity (up to 0.4 m/s). Ring-dot piezoelectric transformers made from a disk shaped NKN ceramic revealed power density as high as 25W/cm3, almost comparable to that obtained for the conventional PZT transformers. In conclusion, NKN ceramics possess good high power characteristics, which are satisfactorily applicable to piezoelectric transformers.

Original languageEnglish
Article number027101
JournalJapanese Journal of Applied Physics
Volume50
Issue number2
DOIs
Publication statusPublished - 2011 Feb 1

Fingerprint

transformers
Lead
ceramics
Piezoelectric materials
Potassium
niobates
Sintering
Sodium
radiant flux density
Q factors
potassium
sintering
sodium
vibration
rings

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

High Power (Na0.5K0.5)NbO3-based lead-free piezoelectric transformer. / Gurdal, Erkan A.; Ural, Seyit O.; Park, Hwi Yeol; Nahm, Sahn; Uchino, Kenji.

In: Japanese Journal of Applied Physics, Vol. 50, No. 2, 027101, 01.02.2011.

Research output: Contribution to journalArticle

Gurdal, Erkan A. ; Ural, Seyit O. ; Park, Hwi Yeol ; Nahm, Sahn ; Uchino, Kenji. / High Power (Na0.5K0.5)NbO3-based lead-free piezoelectric transformer. In: Japanese Journal of Applied Physics. 2011 ; Vol. 50, No. 2.
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