TY - GEN
T1 - Investigation of langanite and langatate single crystals for high temperature sensing
AU - Yu, Fa Peng
AU - Yuan, Duo Rong
AU - Zhao, Xian
AU - Zhang, Shu Jun
PY - 2010/12/1
Y1 - 2010/12/1
N2 - 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.
AB - 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.
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U2 - 10.1109/SPAWDA.2010.5744376
DO - 10.1109/SPAWDA.2010.5744376
M3 - Conference contribution
AN - SCOPUS:79955764365
SN - 9781424498208
T3 - Proceedings of the 2010 Symposium on Piezoelectricity, Acoustic Waves and Device Applications, SPAWDA10
SP - 564
EP - 569
BT - Proceedings of the 2010 Symposium on Piezoelectricity, Acoustic Waves and Device Applications, SPAWDA10
T2 - 2010 Symposium on Piezoelectricity, Acoustic Waves and Device Applications, SPAWDA10
Y2 - 10 December 2010 through 13 December 2010
ER -