@ARTICLE{Maeda2010,
  author = {Takafumi Maeda and Norihito Takiguchi and Takeshi Morita and Mutsuo
	Ishikawa and Tobias Hemsel},
  title = {Hydrothermal (K1-xNax)NbO3 Lead-free Piezoelectric Ceramics},
  journal = {Journal of Korean Physical Society},
  year = {2010},
  volume = {57},
  pages = {924-928},
  number = {4},
  month = {October},
  abstract = {As a lead-free piezoelectric ceramics, (K,Na)NbO$_{3}$ is a promising
	material because of its good piezoelectric properties. In this study,
	(K$_{1-x}$Na$_{x}$)NbO$_{3}$ ceramics were synthesized from a KNbO$_{3}$
	and NaNbO$_{3}$ mixture powder prepared by the hydrothermal reaction.
	The hydrothermal reaction enables the production of high quality
	powder for the ceramics fabrication process. To obtain (K$_{1-x}$Na$_{x}$)NbO$_{3}$
	ceramics, these two powders KNbO$_{3}$ and NaNbO$_{3}$ were mixed
	and then sintered together. X-Ray diffraction analysis revealed that
	the solid solution ceramics (K$_{1-x}$Na$_{x}$)NbO$_{3}$ was produced
	by the sintering process. The K/Na ratio in (K$_{1-x}$Na$_{x}$)NbO$_{3}$
	ceramics was optimized for the best piezoelectric properties. The
	optimized forms was (K$_{0.48}$Na$_{0.52}$)NbO$_{3}$, which showed
	the following piezoelectric properties; k$_{33}$=0.56, d$_{33}$=114pC/N.
	In addition, the ferroelectric properties, P$_{r}$=7.72mC/cm$^{2}$,
	E$_{c}$=857V/mm, and the Curie temperature T$_{c}$=420$_{o}$C were
	also measured.},
  bdsk-url-1 = {http://www.kps.or.kr/jkps/abstract_view.asp?articleuid=2F1C7B20-37BF-45C8-9A4B-311BECCEF052},
  bdsk-url-2 = {http://dx.doi.org/10.3938/jkps.57.924},
  doi = {10.3938/jkps.57.924},
  file = {Maeda2010.pdf:Maeda2010.pdf:PDF},
  issn = {1948-5719},
  keywords = {Lead-free piezoelectric material, KNN, Hydrothermal method},
  timestamp = {2013.09.26},
  url = {http://www.kps.or.kr/jkps/abstract_view.asp?articleuid=2F1C7B20-37BF-45C8-9A4B-311BECCEF052}
}