https://doi.org/10.1051/epjap:2005015
High mechanical quality factor of calcium fluoride (CaF2) at room temperature
1
School of Physics, University of Western Australia, Nedlands, WA 6009,
Australia
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: yanzewu@hotmail.com
Received:
30
July
2004
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
