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- Title
Low-Temperature Sintering and Piezoelectric Properties of CuO-Added 0.95(Na<sub>0.5</sub>K<sub>0.5</sub>)NbO<sub>3</sub>–0.05BaTiO<sub>3</sub> Ceramics.
- Authors
Hwi-Yeol Park; Cheol-Woo Ahn; Kyung-Hoon Cho; Sahn Nahm; Hyeung-Gyu Lee; Hyung-Won Kang; Duk-Hee Kim; Kyeong-Soon Park
- Abstract
The sintering temperature of 0.95(Na0.5K0.5)NbO3–0.05BaTiO3 (NKN–BT) ceramics needs to be decreased below 1000°C to prevent Na2O evaporation, which can cause difficulties in poling and may eventually degrade their piezoelectric properties. NKN–BT ceramics containing CuO were well sintered at 950°C with grain growth. Poling was easy for all specimens. Densification and grain growth were explained by the formation of a liquid phase. The addition of CuO improved the piezoelectric properties by increasing the grain size and density. High piezoelectric properties of d33=230 pC/N, kp=37%, and ℇ3T/ℇ0=1150 were obtained from the specimen containing 1.0 mol% of CuO synthesized by the conventional solid-state method.
- Subjects
SINTERING; CERAMICS; POWDER metallurgy; COPPER oxide; PIEZOELECTRICITY; PIEZOELECTRIC ceramics; METAL crystal growth; EVAPORATION (Chemistry); INDUSTRIAL chemistry
- Publication
Journal of the American Ceramic Society, 2007, Vol 90, Issue 12, p4066
- ISSN
0002-7820
- Publication type
Article
- DOI
10.1111/j.1551-2916.2007.02070.x