Effect of MnO2 on the Piezoelectric Properties of ($1-x$)(Na0.5K0.5)NbO3–$x$BaTiO3 Ceramics
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概要
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(Na0.5K0.5)NbO3 (NKN) and BaTiO3 (BT) ceramics form a homogeneous solid solution. The relative density of the ($1-x$)NKN–$x$BT solid solutions significantly decreased when $x\leq 0.07$. Although the relative density of the 0.95NKN–0.05BT ceramic was very low, it had a high $d_{33}$ value of 134 pC/N. MnO2 was added to improve the piezoelectric properties of the 0.95NKN–0.05BT ceramics by enhancing their sinterability. The addition of MnO2 increased the density of the specimens, as well as improving the piezoelectric properties. The 0.9 mol % MnO2 added 0.95NKN–0.05BT ceramics showed the good piezoelectric properties of $k_{\text{p}}=0.31$, $d_{33}=194$ pC/N and ${\varepsilon_{3}}^{\text{T}}/ \varepsilon_{0} = 800$.
- 2005-10-10
著者
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Kang Nam-kee
Korea Electronics Technology Institute
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Song Hyun-cheol
Department Of Materials Science And Engineering Korea University
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Ahn Cheol-woo
Department Of Materials Science And Engineering Korea University
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LEE Hyeung-Gyu
Korea Electronics Technology Institute
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Nahm Sahn
Department Of Materials Science And Engineering Korea University
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Priya Shashank
Department Of Materials Science And Engineering University Of Texas At Arlington
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Park Seung-ho
International Center For Actuators And Transducers Materials Research Institute Pennsylvania State U
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Uchino Kenji
International Center For Actuators And Transducers (icat) Intercollege Materials Research Laboratory
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Kang Nam-Kee
Korea Electronics Technology Institute, 68 Yatap-dong, Bundang-gu, Soeongnam-si, Gyeonggi-do 463-816, Korea
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Park Seung-Ho
International Center for Actuators and Transducers, Materials Research Institute, Pennsylvania State University, University Park, PA 16802, U.S.A.
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Lee Hyeung-Gyu
Korea Electronics Technology Institute, 68 Yatap-dong, Bundang-gu, Soeongnam-si, Gyeonggi-do 463-816, Korea
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