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Zero temperature coefficient of frequency crystal cuts in monoclinic NdCa 4 O(BO 3 ) 3 piezoelectric crystals
Author(s) -
Yu Fapeng,
Zhang Shujun,
Zhao Xian,
Yuan Duorong,
Wang QingMing,
Shrout Thomas R.
Publication year - 2010
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201004188
Subject(s) - electromechanical coupling coefficient , monoclinic crystal system , piezoelectricity , crystal (programming language) , temperature coefficient , atmospheric temperature range , materials science , piezoelectric coefficient , coupling (piping) , q factor , zero (linguistics) , resonator , coupling coefficient of resonators , condensed matter physics , crystal structure , crystallography , chemistry , physics , thermodynamics , composite material , optoelectronics , linguistics , philosophy , computer science , programming language
The temperature coefficient of frequency (TCF) was investigated in monoclinic NdCa 4 O(BO 3 ) 3 (NdCOB) piezoelectric crystals over the temperature range of –140 °C to 200 °C. A zero TCF characteristic was achieved for the ( ZXw ) 15° crystal cut, with turnover point at 20 °C. The electromechanical coupling k 26 and piezoelectric coefficient d 26 , in shear vibration mode, were determined to be 25% and 13.5 pC/N, respectively. The zero TCF crystal cut, large coupling factor and high piezoelectric coefficient, together with a high mechanical quality factor ( Q > 10,000), demonstrate NdCOB crystals promising candidates for bulk acoustic wave resonators over a wide temperature range. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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