Enhanced Humidity Stability of (Li,K,Na)NbO3-Based Lead-Free Piezoelectric Ceramics by Adding B2O3

Yu Hua Zhen; Dai Shan Wei; Cui Ping Jia; Zhi De Ha

doi:10.4028/www.scientific.net/MSF.745-746.626

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HomeMaterials Science ForumMaterials Science Forum Vols. 745-746Enhanced Humidity Stability of (Li,K,Na)NbO3-Based...

Enhanced Humidity Stability of (Li,K,Na)NbO₃-Based Lead-Free Piezoelectric Ceramics by Adding B₂O₃

Abstract:

5wt%B₂O₃-doped (Li,K,Na)NbO₃(abbreviated as LKNN-B5)-based lead-free piezoelectric ceramics were prepared via solid state synthesis. The electrical humidity sensitive properties of LKNN-B5 ceramics were examined and compared with pure LKNN ceramics. The results revealed thatB₂O₃doping enhanced electrical stability of LKNN-based ceramics in relative humidity (RH) range of 33-95%. The capacitance change was suppressed from 105% down to 43% when doped with B₂O₃. The average absorption time was reduced from 5.5 min to 1.5 min, and desorption time decreased from 8.5 min to 2.0 min. The enhanced electrical stability of LKNN-B5 series was attributed to the dense structure induced by liquid phase sintering.

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Materials Science Forum (Volumes 745-746)

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626-631

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https://doi.org/10.4028/www.scientific.net/MSF.745-746.626

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February 2013

Authors:

Yu Hua Zhen, Dai Shan Wei, Cui Ping Jia, Zhi De Ha

Keywords:

Lead-Free Piezoelectric, Relative Humidity, Stability

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