한국전기전자재료학회논문지 (Journal of the Korean Institute of Electrical and Electronic Material Engineers)

  • 제22권11호
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  • Pages.925-929
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  • 2009
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  • 1226-7945(pISSN)
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  • 2288-3258(eISSN)
한국전기전자재료학회 (The Korean Institute of Electrical and Electronic Material Engineers)
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Ag2O 첨가량에 따른 0.95(K0.5Na0.5)NbO3-0.05Li(Sb0.8Nb0.2)O3 무연 세라믹스의 유전 및 압전특성

Dielectric and Piezoelectric Characteristics of 0.95(K0.5Na0.5)NbO3-0.05Li(Sb0.8Nb0.2)O3 Pb-free Ceramics with amount of Ag2O Addition

  • 발행 : 2009.11.01
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초록

In this study, $0.95(K_{0.5}Na_{0.5})NbO_3-0.05Li(Sb_{0.8}Nb_{0.2})O_3$ ceramics were investigated as a function of the amount of $Ag_2O$ addition in order to improve dielectric and piezoelectric properties of lead-free piezoelectric ceramics. With increasing the amount of $Ag_2O$ addition, density and electromechanical coupling factor ($k_p$) increased up to 0.2 wt.% $Ag_2O$ and decreased above 0.2 wt.% $Ag_2O$. At the sintering temperature of $1020^{\circ}C$, electromechanical coupling factor ($k_p$), density, dielectric constant (${\varepsilon}r$) and curie temperature (Tc) of ceramics with 0.2 wt% $Ag_2O$ showed the optimal values of 0.42, $4.33\;g/cm^3$, 738 and $393^{\circ}C$, respectively.

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참고문헌

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