Journal of Crystal Growth, vol.364, pp.34-39, 2013 (SCI-Expanded)
The grain boundary groove shapes for equilibrated solid neopentylglycol (NPG) solution (NPG-26 mol% AMPD-4 mol% SCN) in equilibrium with the succinonitrile (SCN)-neopentylglycol (NPG)-aminomethylpropanediol (AMPD) liquid (NPG-45 mol% SCN-2.9 mol% AMPD) have been directly observed by using a horizontal linear temperature gradient apparatus. From the observed grain boundary groove shapes, the Gibbs-Thomson coefficient (Γ) and solid-liquid interfacial energy (σSL) of solid NPG solution have been determined to be (7.8 ± 0.8) × 10-8 K m and (8.1 ± 1.2) × 10-3 J m-2, respectively. The grain boundary energy of solid NPG solution has been determined to be (15.8 ± 2.5) × 10-3 J m-2 from the observed grain boundary groove shapes. The ratio of thermal conductivity of equilibrated liquid to thermal conductivity of solid NPG solution has also been determined to be 0.42. © 2012 Elsevier B.V. All rights reserved.