Abstract
Aluminium point cells have been constructed on the basis of a new metal-filling method. High-purity aluminium (6N nominal), purchased as a single rod and as pellets, were used in the newly constructed cells. The new method for filling aluminium was customized for each cell according to the form of aluminium used. Measurements have been conducted on the newly constructed cells as well as on an existing one to evaluate any improvement that may be brought by the proposed cell design and metal-filling method. The measurements include temperature measurements during the solidification of aluminium within each cell from which its freezing curve is obtained, and direct comparative measurements among cells from which the difference in the aluminium point realized among the cells is determined. Both measurements indicate that the proposed method significantly reduces the uncertainty of fixed-point realization.
