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

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22 Citations (Scopus)


The electrical properties of a piezoelectric single crystal of calcium aluminate silicate Ca2Al2SiO7 (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 d14 and d36 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 108 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.

Original languageEnglish
Article number09KD03
JournalJapanese journal of applied physics
Issue number9 PART2
Publication statusPublished - 2013 Sep

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


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