부산대학교 도서관

To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.jct.2009.02.009 Byline: O. BeneA , R.J.M. Konings, C. Kuenzel, M. Sierig, A. Dockendorf, L. Vlahovic Keywords: Heat capacity; Drop calorimetry; Laser welding; Fluoride salts Abstract: The enthalpy increments of four liquid solutions Li.sub.0.8Na.sub.0.2F,Li.sub.0.6Na.sub.0.4F, Li.sub.0.4Na.sub.0.6F, and Li.sub.0.2Na.sub.0.8F were measured in the temperature range (1230 to 1470)K by drop calorimetry. The liquid phases of the LiF and NaF end-members were also measured, in the temperature range (1230 to 1470)K and (1320 to 1540)K, respectively. From the obtained results the molar heat capacity was derived and the data for pure LiF and NaF were correlated with the literature. In order to overcome problems related with the corrosive nature of alkali metal fluoride vapours at high temperature, a novel encapsulation technique is presented in this study. Small nickel crucibles were developed for this purpose which are sealed by laser welding. Author Affiliation: European Commission, Joint Research Centre, Institute for Transuranium Elements, P.O. Box 2340, 76125 Karlsruhe, Germany Article History: Received 13 November 2008; Revised 28 January 2009; Accepted 16 February 2009