Pure nickel fixed points for contact thermometry calibrations

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DOIResolve DOI: http://doi.org/10.1007/s10765-014-1727-9
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TypeArticle
Journal titleInternational Journal of Thermophysics
ISSN0195-928X
Volume35
Issue6
Pages12151222; # of pages: 8
SubjectThermocouples; Fixed points; Pure nickels; Nickel
AbstractA robust fixed point using pure nickel contained in an alumina crucible has been developed for thermocouple calibrations. It was observed that a deep supercool often caused the freezing plateau to be short and have a large slope. A procedure for realizing the pure nickel fixed points was developed that reserved a small amount of nickel in the solid state to act as a seed for nucleation of the freeze. This procedure was found to allow freezing plateaus that were suitably long and flat to make them useful for calibrating thermocouples. Using a calibrated Pt/Pd thermocouple, the freezing temperature of nickel was determined to be (Formula presented.) with a (Formula presented.) uncertainty of (Formula presented.).
Publication date
LanguageEnglish
AffiliationMeasurement Science and Standards; National Research Council Canada
Peer reviewedYes
NPARC number21272692
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Record identifier8e95a51c-c838-4e74-a46a-4e63cff310a5
Record created2014-12-03
Record modified2016-05-09
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