Abstract：The Alumel ferromagnetic material, which has a stable Curie temperature, is usually used as a standard material for thermal analysis temperature calibration. The selection of the raw material of Alumel, the test of raw material composition, the influence of composition difference on the Curie temperature, and the measurement of Curie temperature method were systematically introduced. After the instrument was calibrated with traceable temperature certified reference materials, the indium melting point reference material was selected as the external standard according to the Curie temperature of Alumel, which made the Curie temperature traceable to SI units. The national certified reference material GBW(E)130668(Curie temperature: 161.6 ℃,U=2.1℃,k=2) was tested, and the test value was 161.8℃. The test result was within the uncertainty range of the certified value.
ISO Guide 35:2006 Reference materials statistical principles certification［S］.
［1］
Mitsui Y, Onoue M, Koyama K. Selective Synthesis of Magnetic Materials by Reaction under Magnetic Fields［J］. Materia Japan, 2020, 59(8): 422-428.
Li S, Yu Z G, Yao Y X, et al. Temperature Calibration Method of Optical Power Thermal Analyzer［J］. Acta Metrologica Sinica, 2021, 42(1): 41-45.
［5］
Gallagher P K, Blaine R, Charsley E L, et al. Magnetic Temperature Standards for TG［J］. Journal of Thermal Analysis & Calorimetry, 2003, 72(3): 1109-1116.
［6］
ASTM E1582-00 Standard practice for calibration of temperature scale for thermogravimetry［S］.
Zhou J Y, Huang Y J, Xu J B,et al. Development of Acid Orange Ⅱ Purity Reference Material［J］. Acta Metrologica Sinica, 2020, 41(9): 1163-1170.
［13］
Ting W, Haifeng W, Fang W, et al. Certification of reference materials of Alumel, nickel and iron for Curie point［J］.Journal of Thermal Analysis and Calorimetry, 2018, 131(2): 1979-1985.
Mansfield E, Kar A, Hooker S A. Applications of TGA in quality control of SWCNTs［J］. Anal Bioanal Chem, 2010, 396(3): 1071-1077.
Wu Q, Xiao X F, Gu X J, et al.Correlation Study on Core Size and Complex Permeability of Ni Zn Ferrite with high frequency［J］. Acta Metrologica Sinica, 2010,31(5): 400-403.
Wang Y, Deng X J, Xue T, et al. Study on the Influence of Standard Curve Preparation on Heavy Metals Analysis in Drinking Water by Inductively Coupled Plasma Mass Spectrometry Method［J］. Acta Metrologica Sinica, 2022, 43(6): 818-824.
CNAS-GL06:2006 Guidance on Evaluating the Uncertainty in Chemical Analysis［S］.
［17］
ASTM E 2008-06 Standard test methods for volatility rate by thermogravimetry［S］.
Zou Q, Xiang G Q, Luo W Q, et al. Research progress of novel magnetic materials［J］. Journal of Yanshan University, 2021, 45(1): 1-10.
Tang Z X, Zhang B. The Measurement Method for Permittivity and Permeability of Medium at Microwave Frequencies［J］. Acta Metrologica Sinica, 2007, 28(4): 383-387.
Wang P, Zhao R L, Ling F X, et al. Determination of Nickel Content in Crude Oil by ICP-AES and Evaluation of Uncertainty［J］. Acta Metrologica Sinica, 2021, 42(6): 822-827.
Tan L S, Sun M Y, Hu Y J, et al. Heavy Metal Removal from Aqueous Solution by Functional Magnetic Fe3O4 Nanoparticles［J］. Progress in Chemistry, 2013, 25(12): 12.
Zhang L Y, He S Z, Qiu H R, et al. Uncertainty Evaluation for the Furfural Content in Transformer Oil by HPLC［J］. Acta Metrologica Sinica, 2022, 43(4): 560-564.
2023, Vol. 44 
