Impurity Effects on the Tin Fized-Point Temperature
(0) The purpose of this work is to study the effect of trace impurities on the temperature realised by a high purity (99.9999%) tin fixed-point. This is to improve the measurement of the temperature shift caused by low level impuritydopants, to test the interpolation of previous tin binary alloy systems1 obtained using relatively high levels of impurities and to realise the change in shape of the melting transition for subsequent comparison with theory. The experiments and results revealed the shift of the melting and freezing curves of the initially pure tin cell by -0.71 mK/ppmW of cobalt, -0.18 mK/ppmw of lead and+0.06 mK/ppmW of antimony. It also confirmed the reproducibility of the temperature measurements and melting transition shape in this fixed-point.
Metrology Tin Fized-Point Temperature Impurity Doping Melting/Freezing Curves International Temperature Scale of 1990 (ITS-90)
Patchariya Petchpong David I Head Joe Y.H.Au
Advanced Manufacturing and Enterprise Engineering Group, Brunel University, Uxbridge, Middlesex UB8 National Physical Laboratory, Hampton Road, Teddington, Middlesex TW11 0LW, UK
国际会议
2008年国际温度与热物性测量会议(TEMP BEIJING 2008)
北京
英文
104-108
2008-10-20（万方平台首次上网日期，不代表论文的发表时间）