DocumentCode :
2656132
Title :
Elasto-acoustic properties of ReCa4O(BO3)3 (Re=La, Pr, Nd, Y, Gd) piezoelectric crystals
Author :
Shrout, T.R. ; Yu, F.P. ; Zhang, S.J. ; Wang, Q.M. ; Fei, Y.T. ; Chai, B.H.T.
Author_Institution :
Mater. Res. Inst., Pennsylvania State Univ., University Park, PA, USA
fYear :
2011
fDate :
2-5 May 2011
Firstpage :
1
Lastpage :
4
Abstract :
Oxyborate single crystals, ReCa4O(BO3)3 (Re=La, Pr, Nd, Y. Gd), have recently been demonstrated to offer superior dielectric, piezoelectric and electromechanical properties to quartz, langasite and other commonly used piezoelectric crystals. Of particular significance is the ability to function at temperatures >; 1000°C, offering the potential for SAW, BAW and related sensors operational in harsh environments. In this work, the elasto-acoustic properties of oxyborate crystals were investigated as a function of rare earth cation. Crystallographic relationships were determined to be related to bond length and dependence of cation ordering, which was also reflected in the mechanical loss. Parameters related to high temperature operation, including electrical resistivity, dielectric loss, together with temperature dependent electromechanical and elastic properties were determined and discussed in relation to various applications.
Keywords :
bulk acoustic wave devices; calcium compounds; crystal structure; crystallography; dielectric losses; elasticity; electrical resistivity; gadolinium compounds; lanthanum compounds; neodymium compounds; piezoelectric materials; praseodymium compounds; quartz; surface acoustic wave sensors; yttrium compounds; BAW sensor; GdCa4O(BO3)3; LaCa4O(BO3)3; NdCa4O(BO3)3; PrCa4O(BO3)3; SAW sensor; YCa4O(BO3)3; cation ordering; crystallographic relationship; dielectric loss; dielectric properties; elastoacoustic properties; electrical resistivity; electromechanical properties; langasite; oxyborate single crystal; piezoelectric crystal; quartz; rare earth cation; Couplings; Crystals; Neodymium; Resonant frequency; Temperature distribution; Temperature sensors;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Frequency Control and the European Frequency and Time Forum (FCS), 2011 Joint Conference of the IEEE International
Conference_Location :
San Fransisco, CA
ISSN :
1075-6787
Print_ISBN :
978-1-61284-111-3
Type :
conf
DOI :
10.1109/FCS.2011.5977271
Filename :
5977271
Link To Document :
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