Piezoelectric applications of hydrothermal lead-free (K0.48Na0.52)NbO3 ceramics

Maeda, Takafumi; Bornmann, Peter; Hemsel, Tobias; Morita, Takeshi

doi:10.1109/ULTSYM.2012.0048

by Takafumi Maeda, Peter Bornmann, Tobias Hemsel, Takeshi Morita

Abstract:

A hydrothermal method utilizes a crystallization process in the solution so that the pure and high-quality powders can be realized. Sintering from the hydrothermal KNbO3 and NaNbO3 powders, a high-dense lead-free piezoelectric (K,Na)NbO3 ceramics could be obtained (density: 98.8\%). Concerning about the g33 constant, high value as large as commercial PZT ceramics was measured. Therefore, the hydrothermal (K,Na)NbO3 ceramics is usable for the sensors and the energy harvesting devices. To demonstrate the (K,Na)NbO3 ceramics, a hydrophone sensor was fabricated and evaluated.

Reference:

Maeda, T.; Bornmann, P.; Hemsel, T.; Morita, T.: Piezoelectric applications of hydrothermal lead-free (K0.48Na0.52)NbO3 ceramics. Ultrasonics Symposium (IUS), 2012 IEEE International, 2012.

Bibtex Entry:

@INPROCEEDINGS{Maeda2012a,
  author = {Maeda, Takafumi and Bornmann, Peter and Hemsel, Tobias and Morita,
	Takeshi},
  title = {Piezoelectric applications of hydrothermal lead-free (K0.48Na0.52)NbO3
	ceramics},
  booktitle = {Ultrasonics Symposium (IUS), 2012 IEEE International},
  year = {2012},
  pages = {194-195},
  abstract = {A hydrothermal method utilizes a crystallization process in the solution
	so that the pure and high-quality powders can be realized. Sintering
	from the hydrothermal KNbO3 and NaNbO3 powders, a high-dense lead-free
	piezoelectric (K,Na)NbO3 ceramics could be obtained (density: 98.8\%).
	Concerning about the g33 constant, high value as large as commercial
	PZT ceramics was measured. Therefore, the hydrothermal (K,Na)NbO3
	ceramics is usable for the sensors and the energy harvesting devices.
	To demonstrate the (K,Na)NbO3 ceramics, a hydrophone sensor was fabricated
	and evaluated.},
  bdsk-url-1 = {http://dx.doi.org/10.1109/ULTSYM.2012.0048},
  doi = {10.1109/ULTSYM.2012.0048},
  issn = {1948-5719},
  keywords = {crystallisation;hydrophones;piezoceramics;potassium compounds;powder
	technology;powders;sensors;sintering;sodium compounds;(K0.48Na0.52)NbO3;KNbO3
	powder;NaNbO3 powder;crystallization;energy harvesting devices;g33
	constant;hydrophone sensor;hydrothermal lead-free (K0.48Na0.52)NbO3
	ceramics;hydrothermal method;piezoelectric applications;sintering;Materials;Transducers},
  owner = {K. Agbons jr},
  timestamp = {2013.11.23}
}