Eur. Phys. J. Appl. Phys.
Volume 30, Number 3, June 2005
|Page(s)||189 - 192|
|Section||Imaging, Microscopy and Spectroscopy|
|Published online||04 March 2005|
High mechanical quality factor of calcium fluoride (CaF2) at room temperature
School of Physics, University of Western Australia, Nedlands, WA 6009,
2 Research Institute of Synthetic Crystals, Beijing 100018, P.R. China
3 School of Computer and Information Science, Edith Cowan University, Mt. Layley, WA 6050, Australia
Corresponding author: firstname.lastname@example.org
Revised: 16 December 2004
Accepted: 22 December 2004
Published online: 4 March 2005
We present results on the room temperature mechanical quality factor of single crystal calcium fluoride (CaF2) grown by the Bridgman-Stockbarger method. Resonant mode Q-factors are measured in the frequency range 20 to 76 kHz using tungsten wire loop suspensions. In spite of indications of only moderate crystal purity, we observed 6 modes with Q-factor > 107, and one with , more than an order of magnitude higher than previously reported results.
PACS: 43.40.+s – Structural acoustics and vibration / 43.60.+d – Acoustic signal processing / 46.50.+a – Fracture mechanics, fatigue and cracks / 62.30.+d – Mechanical and elastic waves; vibrations
© EDP Sciences, 2005
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