Title :
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
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 (kp) 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;
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
DOI :
10.1109/ISAF.2014.6922960
