Nickel curie point standard substance and preparation method thereof

Abstract

The invention discloses a preparation method of a nickel curie point standard substance, which comprises the following steps of: by using a nickel foil with the purity of more than 99% as a raw material, analyzing and confirming the components and content of the raw material, and purifying the raw material by adopting a vacuum distillation method according to different boiling points and saturatedvapor pressures of the components, carrying out uniformity initial detection with a specific magnitude on the purified raw materials and taking the screened raw materials with the uniform Curie temperature as candidate standard substances, and carrying out uniformity test, stability test, magnitude determination and uncertainty analysis on the candidate standard substances according to metrologyrequirements, and if the uniformity, stability and uncertainty meet the requirements and the magnitude is accurate and stable and meets metrology characteristics, obtaining the nickel curie point standard substance. The nickel curie point standard substance obtained by the preparation method disclosed by the invention is accurate and stable in characteristic magnitude, can be used for verificationor calibration of related instruments and evaluation of an analysis method, and provides important technical support for detection and supervision management in the fields of materials, environmentalprotection, biological medicines, food inspection and the like.

Description

technical field [0001] The invention belongs to the technical field of measurement, relates to the field of a standard substance, in particular to a nickel Curie point standard substance and a preparation method thereof. Background technique [0002] In recent years, the development of magnetic materials has been very rapid and widely used, especially the continuous emergence of new magnetic materials, which has played a huge role in promoting the progress of modern industrial technology. Therefore, it has become one of the hot fields of exploration and research by scientists from all over the world. . As one of the most important intrinsic parameters of magnetic materials, the Curie temperature is also the main physical parameter of the intrinsic magnetic properties of magnetic materials, which reflects that ferromagnetic materials change from ferromagnetic substances to paramagnetic substances with the increase of temperature, that is, Sign of the transition from magnetic...

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Problems solved by technology

[0005] Patent CN1198127C discloses a standard sample used for temperature calibration of thermogravimetric analyzer and its preparation method. The standard sample is composed of two samples, one sample with a calibration temperature of 29°C and the other with a calibration temperature of 90.4°C, but Both samples are prepared by the sol-gel method, non-metallic standard substances, and do not have metrological traceability

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