Enhancement of Piezoelectric Properties of Low-Temperature-Fabricated Pb(Mg<sub>1/3</sub>Nb<sub>2/3</sub>)O<sub>3</sub>-PbZrO<sub>3</sub>-PbTiO<sub>3</sub> Ceramics with LiBiO<sub>2</sub> Sintering Aid by Post-Annealing Process
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- Hayashi Takashi
- Department of Materials Science and Engineering, Shonan Institute of Technology
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- Hasegawa Tomoyuki
- Department of Materials Science and Engineering, Shonan Institute of Technology
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- Akiyama Yoshikazu
- R&D Center, RICOH Co., Ltd.
書誌事項
- タイトル別名
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- Enhancement of Piezoelectric Properties of Low-Temperature-Fabricated Pb(Mg1/3Nb2/3)O3-PbZrO3-PbTiO3 Ceramics with LiBiO2 Sintering Aid by Post-Annealing Process
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説明
The improvement of the piezoelectric properties of low-temperature-fabricated 0.375Pb(Mg1⁄3Nb2⁄3)O3-0.25PbZrO3-0.375PbTiO3 (PMNZT) ceramics with a LiBiO2 sintering aid was investigated by adopting a post-annealing process. The sinterability of PMNZT powders was markedly enhanced by liquid phase sintering with the addition of LiBiO2, resulting in a decrease in the required sintering temperature from 1000 to 800°C and the formation of a grain boundary layer. And, it was confirmed by a transmission electron microscope-X-ray energy-dispersive spectrometry (TEM-EDS) that the secondary phase along grain boundaries, which deteriorated the piezoelectric properties, included Pb diffused from PMNZT grains as well as Bi from the LiBiO2 additive. The secondary phase along grain boundaries was significantly removed by annealing after sintering. The 0.75 wt% LiBiO2-added PMNZT ceramics sintered at 800°C for 2 h with post-annealing at 800°C for 10 h exhibited a higher electromechanical coupling factor (kp) of 60.8% and a higher piezoelectric coefficient (d33) of 504 pm/V (at 15 kV/cm), compared with those of the sintered specimens without post-annealing. Also, LiBiO2-added PMNZT multilayer ceramics with Ag internal electrodes were successfully sintered at 800°C. The post-annealed multilayer ceramics sintered at 800°C exhibited a higher d33 value of 506 pm/V. Thus, a low-temperature sintering technique with post-annealing for the removal of the grain boundary layer without deteriorating piezoelectric properties was established.
収録刊行物
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- Japanese Journal of Applied Physics
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Japanese Journal of Applied Physics 43 (9B), 6683-6688, 2004
The Japan Society of Applied Physics
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詳細情報 詳細情報について
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- CRID
- 1390001206266137600
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- NII論文ID
- 10013612304
- 210000056456
- 130004532926
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- NII書誌ID
- AA10457675
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- ISSN
- 13474065
- 00214922
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- NDL書誌ID
- 7106811
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- 本文言語コード
- en
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- JaLC
- NDLサーチ
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