Electro-elastic characterization of Ca3TaGa3Si2O14 crystals for lateral-field-excitation acoustic wave sensing applications

Tingfeng Ma, Shuai Hou, Fapeng Yu, Chao Xie, Shujun Zhang, Ji Wang, Jianke Du, Jie Zhan, Xiufeng Cheng, Shenglai Wang, Xian Zhao

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

The Ca3TaGa3Si2O14 (CTGS) crystals with ordered structure are promising for piezoelectric sensing applications. In this work, the electro-elastic constants of CTGS crystals were determined taking advantage of impedance and pulse-echo methods. The relative dielectric permittivities ε11T0 and ε33T0 are 17.5 and 21.8, the elastic stiffness constants c11E, c12E, c13E, c14E, c33E, c44E and c66E are 15.63, 7.52, 8.55, 0.05, 22.51, 4.15 and 4.06 × 1010 N/m2, while the piezoelectric coefficients d11 and d14 are 4.17 and −13.7 pC/N, respectively. In addition, the properties of lateral-field-excitation (LFE) acoustic wave were studied, where crystal cut with pure-LFE was designed and LFE acoustic wave prototype was fabricated. The mechanical quality factor Qm for CTGS based pure-LFE device in distilled water was obtained to be 1400, nearly two times that of La3Ga5SiO14 based device, potential for sensing applications in liquid-phase environment.

Original languageEnglish (US)
Pages (from-to)518-524
Number of pages7
JournalJournal of Alloys and Compounds
Volume728
DOIs
StatePublished - Jan 1 2017

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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