Abstract
This paper reports on the piezoelectric anomalies at the temperature or composition-induced ferroelastic phase transitions of tungsten bronze ferroelectrics. First, the temperature-dependent piezoelectric properties of Sr1.9Ca0.1NaNb5O15 (SCNN) ceramics were characterized using a resonance/anti-resonance method. SCNN has a ferroelastic phase transition manifested by a broad dielectric peak in the temperature range of -60°C to 20°C. The electromechanical coupling factor and elastic compliance showed the maximum at -40°C, increasing the transverse piezoelectric constant (d31) by 38% compared with the room temperature value. Tungsten bronze ferroelectrics follow a trade-off relationship between the longitudinal piezoelectric constant (d33) and the Curie temperature, while SCNN deviates significantly from the trend curve. This deviation is attributed to the ferroelastic phase transition close to room temperature. Second, the ferroelastic phase transition was investigated for epitaxial films of (1-x)(Sr3Ba2)Nb10O 30-xBa4Bi2/3Nb10O30 as a function of the composition. A careful structural analysis by X-ray diffraction revealed that there is a ferroelastic phase boundary between tetragonal and orthorhombic crystals at x = 0.06-0.3. The electric field-induced strain and the relative dielectric constants characterized at 80K for the epitaxial films increased in the vicinity of the phase boundary composition. These results suggest that engineering the ferroelastic phase transition is an approach to improving the piezoelectric properties of lead-free tungsten bronze ferroelectrics.
| Original language | English |
|---|---|
| Pages (from-to) | 717-721 |
| Number of pages | 5 |
| Journal | Journal of the Ceramic Society of Japan |
| Volume | 118 |
| Issue number | 1380 |
| DOIs | |
| Publication status | Published - Jan 1 2010 |
| Externally published | Yes |
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All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Chemistry(all)
- Condensed Matter Physics
- Materials Chemistry
Cite this
Piezoelectric anomalies at the ferroelastic phase transitions of lead-free tungsten bronze ferroelectrics. / Watanabe, Takayuki; Hayashi, Jumpei; Matsuda, Takanori; Ifuku, Toshihiro; Lee, Bong Yeon; Iijima, Takashi; Funakubo, Hiroshi; Yu, Houzhona; Kumada, Nobuhiro.
In: Journal of the Ceramic Society of Japan, Vol. 118, No. 1380, 01.01.2010, p. 717-721.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Piezoelectric anomalies at the ferroelastic phase transitions of lead-free tungsten bronze ferroelectrics
AU - Watanabe, Takayuki
AU - Hayashi, Jumpei
AU - Matsuda, Takanori
AU - Ifuku, Toshihiro
AU - Lee, Bong Yeon
AU - Iijima, Takashi
AU - Funakubo, Hiroshi
AU - Yu, Houzhona
AU - Kumada, Nobuhiro
PY - 2010/1/1
Y1 - 2010/1/1
N2 - This paper reports on the piezoelectric anomalies at the temperature or composition-induced ferroelastic phase transitions of tungsten bronze ferroelectrics. First, the temperature-dependent piezoelectric properties of Sr1.9Ca0.1NaNb5O15 (SCNN) ceramics were characterized using a resonance/anti-resonance method. SCNN has a ferroelastic phase transition manifested by a broad dielectric peak in the temperature range of -60°C to 20°C. The electromechanical coupling factor and elastic compliance showed the maximum at -40°C, increasing the transverse piezoelectric constant (d31) by 38% compared with the room temperature value. Tungsten bronze ferroelectrics follow a trade-off relationship between the longitudinal piezoelectric constant (d33) and the Curie temperature, while SCNN deviates significantly from the trend curve. This deviation is attributed to the ferroelastic phase transition close to room temperature. Second, the ferroelastic phase transition was investigated for epitaxial films of (1-x)(Sr3Ba2)Nb10O 30-xBa4Bi2/3Nb10O30 as a function of the composition. A careful structural analysis by X-ray diffraction revealed that there is a ferroelastic phase boundary between tetragonal and orthorhombic crystals at x = 0.06-0.3. The electric field-induced strain and the relative dielectric constants characterized at 80K for the epitaxial films increased in the vicinity of the phase boundary composition. These results suggest that engineering the ferroelastic phase transition is an approach to improving the piezoelectric properties of lead-free tungsten bronze ferroelectrics.
AB - This paper reports on the piezoelectric anomalies at the temperature or composition-induced ferroelastic phase transitions of tungsten bronze ferroelectrics. First, the temperature-dependent piezoelectric properties of Sr1.9Ca0.1NaNb5O15 (SCNN) ceramics were characterized using a resonance/anti-resonance method. SCNN has a ferroelastic phase transition manifested by a broad dielectric peak in the temperature range of -60°C to 20°C. The electromechanical coupling factor and elastic compliance showed the maximum at -40°C, increasing the transverse piezoelectric constant (d31) by 38% compared with the room temperature value. Tungsten bronze ferroelectrics follow a trade-off relationship between the longitudinal piezoelectric constant (d33) and the Curie temperature, while SCNN deviates significantly from the trend curve. This deviation is attributed to the ferroelastic phase transition close to room temperature. Second, the ferroelastic phase transition was investigated for epitaxial films of (1-x)(Sr3Ba2)Nb10O 30-xBa4Bi2/3Nb10O30 as a function of the composition. A careful structural analysis by X-ray diffraction revealed that there is a ferroelastic phase boundary between tetragonal and orthorhombic crystals at x = 0.06-0.3. The electric field-induced strain and the relative dielectric constants characterized at 80K for the epitaxial films increased in the vicinity of the phase boundary composition. These results suggest that engineering the ferroelastic phase transition is an approach to improving the piezoelectric properties of lead-free tungsten bronze ferroelectrics.
UR - http://www.scopus.com/inward/record.url?scp=77956922949&partnerID=8YFLogxK
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U2 - 10.2109/jcersj2.118.717
DO - 10.2109/jcersj2.118.717
M3 - Article
VL - 118
SP - 717
EP - 721
JO - Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
JF - Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
SN - 1882-0743
IS - 1380
ER -