Investigation of langanite and langatate single crystals for high temperature sensing

Fa Peng Yu, Duo Rong Yuan, Xian Zhao, Shu Jun Zhang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Scopus citations

Abstract

La3Ga5.5Nb0.5O14 (LGN) and La3Ga5.5Ta0.5O14 (LGT) with trigonal 32 symmetry were grown by Czochralski (CZ) method. High Resolution X-Ray Diffraction (HRXRD) measurement was carried out on the as-grown LGN and LGT crystals for crystal quality evaluation. Frequency temperature dependent behaviors were investigated to explore the zero temperature coefficient of frequency (TCF) cuts at elevated temperature. Among the investigated crystal cuts, (XYt) cuts with length extensional vibration mode (LEM) were found to possess high turnover temperature around 250C, for LGN and LGT crystals. Moreover, LGN (YXl)15 and LGT (YXl)20 crystal cuts, taking advantage of thickness shear vibration mode (TSM), were found to exhibit strong frequency stability in the temperature range of 20400C, with turnover temperatures at 280C and 180C, respectively. The high electromechanical coupling factor k (10%), high mechanical quality factor Q (4000), together with the zero TCF characteristics at elevated temperature, indicating LGN and LGT crystals potential for high temperature (100∼400C) sensing applications.

Original languageEnglish (US)
Title of host publicationProceedings of the 2010 Symposium on Piezoelectricity, Acoustic Waves and Device Applications, SPAWDA10
Pages564-569
Number of pages6
DOIs
StatePublished - Dec 1 2010
Event2010 Symposium on Piezoelectricity, Acoustic Waves and Device Applications, SPAWDA10 - Xiamen, China
Duration: Dec 10 2010Dec 13 2010

Publication series

NameProceedings of the 2010 Symposium on Piezoelectricity, Acoustic Waves and Device Applications, SPAWDA10

Other

Other2010 Symposium on Piezoelectricity, Acoustic Waves and Device Applications, SPAWDA10
CountryChina
CityXiamen
Period12/10/1012/13/10

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Acoustics and Ultrasonics

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