Synthesis of Lead-Free (K, Na)(Nb, Ta)O-3 Nanopowders Using a Sol-Gel Process
- Authors
- Rajesh, Dodla; Kim, Seungwook; Jeong, Jinhoo; Nahm, Sahn; Kim, Woong
- Issue Date
- 4월-2012
- Publisher
- AMER SCIENTIFIC PUBLISHERS
- Keywords
- Piezoelectric; Sol-Gel Process; Lead-Free; Nanopowder
- Citation
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.12, no.4, pp.3555 - 3558
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
- Volume
- 12
- Number
- 4
- Start Page
- 3555
- End Page
- 3558
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/108775
- DOI
- 10.1166/jnn.2012.5585
- ISSN
- 1533-4880
- Abstract
- Lead-free (K0.5Na0.5)(Nb0.7Ta0.3)O-3 piezoelectric material was successfully synthesized via a sol-gel process. Crystalline (K0.5Na0.5)(Nb0.7Ta0.3)O-3 nanopowders were obtained after heat treatment at 700 degrees C. The particle size was estimated to be 87nm +/- 23 nm. The transmission electron microscopy images showed that individual nanoparticles were single crystalline and had a pseudo-cubic structure with a lattice parameter of similar to 3.96 angstrom. Both X-ray diffraction and scanning electron microscopy studies consistently showed that the crystallization of the (K0.5Na0.5)(Nb0.7Ta0.3)O-3 occurred slightly above 500 degrees C. The samples have an appropriate stoichiometry as found via energy dispersive X-ray spectroscopy. The demonstration of the synthesis of (K0.5Na0.5)(Nb0.7Ta0.3)O-3 via a so-gel process as presented in this paper can provide an important foundation for the development of a synthetic route towards (K0.5Na0.5)(Nb0.7Ta0.3)O-3 doped with various other elements for high performance piezoelectric devices.
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