• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.19 no.8
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• pp.717-723
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• 2006

Lead free $(Na_{0.5}K_{0.47}Cd_x)NbO_3$ ceramics (x=0.015-0.005) were prepared by the conventional mixed oxide route. The effects of CdO addition on the sintering, dielectric and piezoelectric properties of the samples were examined. The addition of CdO greatly enhanced the sinterability of ceramics and the sample has a lower dielectric loss. The $k_p\;and\;Q_m$ of the samples with 0.02 mol CdO addition are 0.35 and 125, respectively, The $(Na,K)NbO_3$ ceramics show a large degradation of $k_p$ due to the deliquescence when exposed to humidity, while the $(Na,K,Cd)NbO_3$ ceramics have no a significant degradation of it.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2005.11a
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• pp.204-205
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• 2005

[ $(Na_{0.5},\;K_{0.5})NbO_3$ ] ceramics were studied as lead free Piezoelectric materials. The addition of CdO were enhanced the sinterability of the NKN ceramics. The $(Na_{0.5},\;K_{0.47}Cd_{0.02})NbO_3$ ceramics show that electromachanical coupling factor($k_p$) is 0.34and mechanical quality factor($O_m$) is 120.