Abstract
The temperature of thermogravimetric analyzer (TG) was commonly calibrated by the reference material of ferromagnetic for Curie point (T c). RM for T c was used to be determined by simultaneous thermal analyzer (STA). Three certified reference materials (CRMs) including Alumel, nickel and iron were developed. Prior to the certification, the effects of the heating rate, the magnetic field strength and the type of sample pan upon T c were investigated using STA and TG. These CRMs were certified by an optimized STA method in a collaborative study with eight laboratories involved. Subsequently, their certified values (expanded uncertainties) were 153.9 °C (1.1 °C), 358.7 °C (1.3 °C) and 771.4 °C (1.5 °C), respectively.
Published Version
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