Synthesis of a sodium niobate-based lead-free piezoelectric ceramic using a submicron-sized NaNbO3 powder

Author

Aoyagi, Rintaro ; Bannno, Soichi ; Maeda, Munenori

Author_Institution

Dept. of Eng. Phys., Electron. & Mech., Nagoya Inst. of Technol. (NITECH) Nagoya Japan, Nagoya, Japan

fYear

2014

fDate

12-16 May 2014

Firstpage

1

Lastpage

4

Abstract

A submicron-sized NaNbO₃ fine powder was successfully synthesized using a molten salt method. The sinterability of the NaNbO₃ powder was remarkably improved compared to that of NaNbO₃ prepared using the conventional solid-state reaction method. A 0.9NaNbO₃-0.1BaTiO₃ ceramic was then prepared a using mixture of submicron-sized NaNbO₃ and BaTiO₃ powders. It was found that the mixture reacted at approximately 1000°C to a single-phase, tetragonal perovskite structure with a submicron grain size. The calculated electromechanical coupling factor (k_p) and the piezoelectric constant (d₃₃) measured using a d₃₃ meter were 0.34 and 160 pC/N, respectively.

Keywords

barium compounds; electromechanical effects; grain size; piezoceramics; sintering; sodium compounds; NaNbO₃-BaTiO₃; electromechanical coupling factor; grain size; molten salt method; piezoelectric constant; sinterability; sodium niobate-based lead-free piezoelectric ceramic; solid-state reaction method; submicron-sized fine powder; tetragonal perovskite structure; Ceramics; Density measurement; Dielectric constant; Lead; Powders; Temperature; Temperature measurement; NaNbO3; NaNbO3-BaTiO3; lead-free piezoelectric ceramics; molten salt synthesis; submicron-sized powder;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Ferroelectrics, International Workshop on Acoustic Transduction Materials and Devices & Workshop on Piezoresponse Force Microscopy (ISAF/IWATMD/PFM), 2014 Joint IEEE International Symposium on the

Conference_Location

State College, PA

Type

conf

DOI

10.1109/ISAF.2014.6922960

Filename

6922960