Growth and Characterization of Ca₂Al₂SiO₇ Piezoelectric Single Crystals for High-Temperature Sensor Applications

• Manabu Hagiwara

• Hiroaki Noguchi

• Takuya Hoshina

• Hiroaki Takeda

• Shinobu Fujihara

• Nobuhiro Kodama

• Takaaki Tsurumi

Abstract

The electrical properties of a piezoelectric single crystal of calcium aluminate silicate Ca 2 Al 2 SiO 7 (CAS) were studied at elevated temperatures and its applicability to high-temperature pressure sensors was investigated. The CAS bulk single crystal was grown by the Czochralski method. The piezoelectric d 14 and d 36 constants were respectively evaluated as 6.04 and 4.04 pC/N by the resonance and antiresonance method. The temperature dependence of the piezoelectric constant was investigated at temperatures up to 500 °C. The electrical resistivity at 800 °C was on the order of 10 8 Ω·cm along both the crystallographic a - and c -axes. The measurement of direct piezoelectric response at 700 °C demonstrated that the CAS crystal could detect a pseudo-combustion pressure change of an automobile engine. Our observations suggest that CAS crystals are superior candidates for sensing pressure at high temperatures.

Journal

• Japanese Journal of Applied Physics

  Japanese Journal of Applied Physics 52 (9S1), 09KD03-, 2013-09-01

  IOP Publishing

Keywords

• General Physics and Astronomy
• General Engineering

Details

• CRID: 1360284924864493440
• NII Article ID: 210000142842
• DOI: 10.7567/jjap.52.09kd03
• ISSN: 13474065
• ISSN: 00214922
• ISSN: http://id.crossref.org/issn/13474065
• Web Site: https://iopscience.iop.org/article/10.7567/JJAP.52.09KD03
• Web Site: https://iopscience.iop.org/article/10.7567/JJAP.52.09KD03/pdf
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