Characterization of neodymium calcium oxyborate piezoelectric crystal with monoclinic phase

Fapeng Yu, Shujun Zhang, Xian Zhao, Duorong Yuan, Chun Ming Wang, Thomas R. Shrout

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59 Scopus citations

Abstract

Piezoelectric crystals of neodymium calcium oxyborate, NdCa 4O(BO3)3 (NdCOB), were grown by the Czochralski technique. The density was measured using the Archimedes method and found to be 3.63 g/cm3, in good agreement with the theoretical value. The thermal properties of NdCOB have been investigated, with the specific heat being on the order of 0.550 J/(g C). The four thermal expansion coefficients were measured and found to be ±11 = 8.12, ±13 = 0.680, ±22 = 5.96, and ±33 = 10.3 (10 -6/C), respectively. The relative dielectric permittivities were determined to be e11T/e0 = 9.90, e22T/e 0 = 15.5, e33T/e0 = 10.2, and e13 T/e0 = -1.60, respectively, with corresponding low dielectric loss at 100 kHz, being on the order of <0.1%. The complete set of dielectric, elastic, and piezoelectric constants for NdCOB single crystals were determined by the resonance method and compared to other oxyborate crystals ReCa4O(BO3)3 (Re = rare earth), where NdCOB exhibited relatively higher piezoelectric properties with d13 = -4.8 pC/N, k13 = 16.8%, d26 = 16.5 pC/N, and k26 = 31.1%, respectively. The relationship between piezoelectric property and structure was explored, in order to further improve the properties of ReCOB crystals.

Original languageEnglish (US)
Pages (from-to)1871-1877
Number of pages7
JournalCrystal Growth and Design
Volume10
Issue number4
DOIs
StatePublished - Apr 7 2010

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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