Specific Surface Free Energy of As-Grown and Polished Faces of Synthetic Quartz

Takaomi Suzuki^1*, Keiko Takahashi¹, Masayuki Kawasaki², Toshihiko Kagami²

¹Faculty of Engineering, Shinshu University, Nagano, Japan.
²Nihon Dempa Kogyo Co., Ltd. (NDK), Sayama, Japan.

DOI: 10.4236/jcpt.2014.44022                

Abstract

Contact angles of water droplet on as-grown Z, +X, –X, and m faces of synthetic quartz crystals with growth term of 20 and 48 days, and polished Z, +X, –X, Y, and 45° cut faces of synthetic quartz crystal were observed. The average of the contact angles on as-grown Z, +X, and –X faces increased with the growth term, and they were larger than that on polished Z, +X, and –X faces. On the other hand, the average of the contact angles of water on m face decreased with the growth term, and they were smaller than that on polished Y cut face. Growth rate of the faces of synthetic crystals was measured and the order of growth rate was, m < –X < +X < Z. Specific surface free energy (SSFE) was calculated using Neumann’s equation. The SSFE of polished face was in the order of, m < –X < +X < Z, which corresponds to the order of the growth rate. The SSFE was larger for the face with larger growth rate.

Keywords

Surface Free Energy, Quartz Crystals

Conflicts of Interest

The authors declare no conflicts of interest.

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