Ultrahigh temperature Bi3Ti0.96Sc 0.02Ta0.02NbO9-based piezoelectric ceramics

Zhi Gang Gai, Jin Feng Wang, Wen Bin Sun, Chun Ming Wang, Ming Lei Zhao, Shang Qian Sun, Bao Quan Ming, Peng Qi, Li Mei Zheng, Juan Du, Shujun Zhang, Thomas R. Shrout

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Abstract

The effect of (Sc,Ta,Ce) doping on the properties of Bi3 TiNbO9 (BTNO)-based ceramics was investigated. The cerium modification greatly improves the piezoelectric activity of Bi3(Ti0.96Sc 0.02Ta0.02)NbO9-based ceramics and significantly decreases the dielectric dissipation. The d33 of Bi3Ti0.96Sc0.02Ta0.02NbO 9 +x wt % CeO2 (x=0.35) was found to be 18 pC/N, the highest value among the BTNO-based ceramics and almost three times as much as the reported d33 values of the pure BTNO ceramics (∼6 pC/N). The modification increased the resistivity ρ of the samples extremely, resolving the low resistivity problem for high temperature applications. The dielectric spectroscopy shows that the TC for all the ceramics is higher than 900°C. The mechanical quality factor Q and planar coupling factors k p and kt of Bi3Ti0.96Sc 0.02Ta0.02NbO9 +0.35 wt % CeO2 ceramic were found to be 2835, 9%, and 23%, respectively, and it has high T C and stable piezoelectric properties, demonstrating that the (Sc,Ta,Ce) modified BTNO-based material is a wonderful candidate for high temperature applications.

Original languageEnglish (US)
Article number024106
JournalJournal of Applied Physics
Volume104
Issue number2
DOIs
StatePublished - Aug 12 2008

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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