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Crystal Research and Technology |
Cryst. Res. Technol. 42, 1217 (2007) - Abstract -
Measurement of specific surface free energy of ruby and quartz single crystals using contact angle of liquids
Takaomi Suzuki, Naoki Sugihara, Eiichi Iguchi, Katsuya Teshima, Shuji Oishi, and Masayuki Kawasaki*
Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, Japan
*Nihon Dempa Kogyo Co. Ltd. (NDK), 1275-2, Kamihirose, Sayama 350-1321, Japan
The specific surface free energy of ruby and quartz single crystal was experimentally obtained using contact angle of water and formamide droplets on the crystal surfaces, and compared with the morphology of each crystal. The ruby crystals satisfied Wulff’s relationship even though their shape were not equilibrium form. The specific surface free energies of the growing faces of synthetic quartz crystal, -X, +X, Z, and S faces were obtained as 51.9, 55.6, 57.4, and 58.9 mN/m, respectively. The growth rates of these faces were 0.09, 0.23, 0.28, and 0.33 mm/day, respectively. The growth rate of each face of the quartz crystal can be regarded as a function of the experimentally obtained specific surface free energy.
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