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http://dx.doi.org/10.4313/JKEM.2006.19.10.935

Effects of Fe2O3 Addition on Piezoelectric Properties of Pb(Ni1/3Nb2/3)O3-PbTiO3 Ceramics for Actuator Applications  

Lim Eun-Kyeong (요업기술원 전자부품팀)
Kim Chang-Il (요업기술원 전자부품팀)
Lee Young-Jin (요업기술원 전자부품팀)
Im Jong-In (요업기술원 전자부품팀)
Paik Jong-Hoo (요업기술원 전자부품팀)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.19, no.10, 2006 , pp. 935-941 More about this Journal
Abstract
In this paper, the dielectric and piezoelectric properties of $0.4Pb(Ni_{1/3}Nb_{2/3})O_3+0.6Pb(Zr_{405}Ti_{595})O_3+X\;wt%\;Fe_2O_3$ ceramics were investigated with the addition of $Fe_2O_3$ and sintering temperature. Dielectric constant and piezoelectric constant increased with amount of $Fe_2O_3$ to 0.25 wt% and then decreased the further addition of $Fe_2O_3$. It seems that $Fe_2O_3$ acts as a sintering aid at the sintering temperature of $1150^{\circ}C$. By the addition of $Fe_2O_3$., sintering temperature of the system was lowered from $1250^{\circ}C\;to\;1100^{\circ}C$. The piezoelectric properties showed the maximum value of ${\varepsilon}r=4669,\;d_{33}=810(10^{-12}m/V)$, kp = 77 %, Qm = 55, in $0.4Pb(Ni_{1/3}Nb_{2/3})O_3\;-0.6Pb(Zr_{0.405}Ti_{0.595})O_3+0.25wt%\;Fe_2O_3$ ceramics having composition near the morphotropic phase boundary. The composition may be appropriate for actuator materials because of high piezoelectric constant and electromechanical coupling factor.
Keywords
Piezoelectric; Morphotropic phase boundary; Electromechanical coupling factor; Dielectric constant; Actuator;
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