Measurements of acoustical physical constants of La 3Ta 0.5Ga 5.3Al 0.2O 14 single crystals at high temperatures

Tomoaki Karaki, Tao Lv, Masatoshi Adachi, Yuji Ohashi, Mototaka Arakawa, Jun Ichi Kushibiki

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5 Citations (Scopus)


La 3Ta 0.5Ga 5.3Al 0.2O 14 (LTGA) were measured by combing plane-wave ultrasonic microspectroscopy (PW-UMS) technology with the resonance-antiresonance method in a range from room temperature to 1000 °C. The influence of dielectric loss at high temperatures on resonance and antiresonance frequencies was discussed. At room temperature, the piezoelectric constants d 11 and d 14 were 6.62 and °4:65 pC/N, respectively. d 11 increased to 7.5 pC/N at 1000 °C. The electromechanical coupling factor k 12 was about 16.8% in the entire temperature range. All the necessary parameters of the LTGA crystal for acoustic wave applications at high temperatures were determined in this research.

Original languageEnglish
Article number09LD09
JournalJapanese journal of applied physics
Issue number9 PART 2
Publication statusPublished - 2012 Sep

ASJC Scopus subject areas

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


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