Preparation method and application of Alema alloy Curie point standard substance

Abstract

The invention discloses a preparation method of a Curie point standard substance of an Aleimel alloy. The method comprises steps by using the Aleimel alloy as a raw material, analyzing and confirmingcomponents and the content of raw materials, and purifying the raw materials by using a vacuum distillation method according to different boiling points and saturated vapor pressures of the components; making the purified raw materials be subjected to uniformity initial detection with a specific quantity value, and screening the raw materials with the uniform Curie temperature out to serve as candidate standard substances; and carrying out uniformity test, stability test, magnitude determination and uncertainty analysis of a candidate standard substance according to metrology requirements, ifuniformity, stability and uncertainty meet the requirements, the magnitude is accurate and stable and conforms to metrology characteristics, namely, the Aleimel alloy Curie point standard substance isobtained. The method is advantaged in that the standard substance obtained by the preparation method is accurate and stable in characteristic quantity value, can be used for verification or 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, environmental protection,biological medicines, food inspection and the like.

Description

Technical field [0001] The invention belongs to the technical field of measurement, and relates to a standard substance, in particular to a preparation method and application of the Aleumel alloy Curie point standard substance. Background technique [0002] In recent years, the development of magnetic materials has been very rapid, with a wide range of applications, especially the continuous emergence of new magnetic materials, which has played a huge role in the advancement of modern industrial technology. Therefore, it has become one of the hotspots for scientists from all over the world to explore and research. . 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. It reflects that ferromagnetic materials change from ferromagnetic materials to paramagnetic materials with increasing temperature, namely Mark the transition from magnetic to no...

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Problems solved by technology

[0005] In the prior art, the patent CN1198127C discloses a standard sample used for thermogravimetric analyzer temperature calibration and its preparation method. The standard sample consists of two samples Composition, the calibration temperature of one sample is 29°C, and the calibration temperature of the other is 90.4°C, but both samples are prepared by sol-gel method, non-metallic standard substances, and have no metrological traceability

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