UME Radiation Thermometer Calibration Facilities below the Freezing Point of Silver (961.78 °C)

2003 ◽  
Author(s):  
Ahmet Diril
Keyword(s):  
Freezing Point ◽  
Radiation Thermometer ◽  
Thermometer Calibration ◽  
Freezing Point Of Silver

scholarly journals Uncertainty Assessment on the Freezing Point of Silver in the ITS-90.

Netsu Bussei ◽  
2000 ◽  
Vol 14 (4) ◽  
pp. 278-283 ◽  
Author(s):  
Masaru Arai ◽  
Katsuhiko Harada
Keyword(s):  
Freezing Point ◽  
Uncertainty Assessment ◽  
Freezing Point Of Silver

scholarly journals Effects of Quartz Glass Insulation on Platinum Gold Thermocouples

2019 ◽  
Vol 19 (5) ◽  
pp. 209-212
Author(s):  
Peter Pavlasek ◽  
Jan Rybař ◽  
Stanislav Ďuriš ◽  
Jakub Palenčar
Keyword(s):  
Quartz Glass ◽  
Freezing Point ◽  
Aluminium Oxide ◽  
Platinum Resistance ◽  
Insulation Material ◽  
Glass Insulation ◽  
Purity Aluminium ◽  
Platinum Resistance Thermometers ◽  
High Purity Aluminium ◽  
Freezing Point Of Silver

Abstract Au/Pt thermocouples are considered as an alternative to High Temperature Platinum Resistance Thermometers and are one of the prime candidates to replace them as the interpolating instrument of the International Temperature Scale of 1990 (ITS-90) in the temperature range between about 660 °C and 962 °C. This work presents the results of investigation of two Au/Pt thermocouples that used exclusively quartz glass (SiO2) as insulation material. Measurements in fixed points of Zn, Al, and Ag were realized on these thermocouples as well with interchanged inner insulation made of high purity aluminium oxide (Al2O3). The conducted experiments tested the performance of Au/Pt thermocouples with the use of different insulation materials. The measured electromotive forces were found to be sensitive to the replacement of the quartz glass by aluminium oxide as an insulation material of the Au/Pt thermocouples. This change of insulation has resulted in a temperature increase up to about 0.5 K measured at the freezing point of silver. The decreasing insulation resistance of quartz glass at higher temperatures is believed to be the source of thermoelectric instability.

scholarly journals The Freezing Point of Silver

Nature ◽  
1895 ◽  
Vol 52 (1355) ◽  
pp. 596-597
Author(s):  
C. T. HEYCOCK ◽  
F. H. NEVILLE
Keyword(s):  
Freezing Point ◽  
Freezing Point Of Silver
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