Measurement method for substance variable temperature magnetic susceptibility and measurement device thereof

A measurement method and technology of magnetic susceptibility, which is applied in the field of measurement method and device for measuring material magnetic susceptibility, and can solve problems such as limitations and large errors

Active Publication Date: 2014-04-23
SHANGHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the limitations of the traditional measurement method of magnetic susceptibility and the problem of large errors, the purpose of the present invention is to overcome the shortcomings of the existing technology, to provide a method for measuring the magnetic susceptibility of a ma

Method used

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  • Measurement method for substance variable temperature magnetic susceptibility and measurement device thereof
  • Measurement method for substance variable temperature magnetic susceptibility and measurement device thereof
  • Measurement method for substance variable temperature magnetic susceptibility and measurement device thereof

Examples

Experimental program
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Embodiment 1

[0055] In this example, see figure 1 The material magnetic susceptibility measuring device is composed of an electronic balance 1 with a hook, a balance support 2, a sample tube 4, a magnetic field generator and a magnetic susceptibility analysis system 14, the balance support supports the electronic balance 1, and the sample tube 4 is capable of loading the tested sample 5 has a bottomed container, the sample tube 4 is suspended on the hook of the electronic balance 1, the sample tube 4 is arranged in the magnetic field environment formed by the magnetic field generator, the weighing data signal output terminal of the electronic balance 1 and the magnetic susceptibility analysis system 14 The input end is connected, and the magnetic susceptibility information of the sample to be tested is processed and output by the magnetic susceptibility analysis system 14, and the sample tube 4 is suspended in the inner cavity of the heating furnace formed by a vertically arranged cylindric...

Embodiment 2

[0060] It is basically the same as the aforementioned first embodiment, and the special features are:

[0061] In this embodiment, a pure titanium sample is used as the tested sample 5, and the magnetic field generator adopts a superconducting coil for excitation, and by adjusting the shape and configuration of the superconducting coil, a magnetic field with a magnetic field gradient product stable region is generated, so that the magnetic field in the magnetic field gradient The magnetic force suffered by the matter in the product constant area is a constant value. Using a superconducting coil to excite the magnet, a similar magnetic field can be constructed by adjusting the shape and structure of the superconducting coil, without using the auxiliary wedge-shaped magnetic conducting pole head 13 in the first embodiment. When using the material magnetic susceptibility measuring device of this embodiment to measure the variable temperature magnetic susceptibility of pure titani...

Embodiment 3

[0064] It is basically the same as the aforementioned first embodiment, and the special features are:

[0065] In this embodiment, a single crystal aluminum sample is used as the test sample 5, and the magnetic susceptibility of the (100) crystal plane is measured, wherein the gradient magnetic field is generated by a superconducting coil. When measuring the variable temperature magnetic susceptibility of a single crystal aluminum sample, first adjust the input current in the superconducting coil, and adjust the magnetic field gradient product to 400T 2 / m. Then put a single crystal aluminum sample with a known mass m=1.0000g into the sample tube 4, hang it in the uniform area of ​​the magnetic field gradient product, and make the measured crystal plane (100) perpendicular to the direction of the magnetic field, and place the whole device in a vacuum In the sealing device 6, vacuumize to 10 -3 Pa, exclude air interference. Then adjust the heating current of the temperature c...

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Abstract

The invention discloses a measurement method for a substance variable temperature magnetic susceptibility. The measurement method comprises the following steps: controlling a temperature in a vacuum furnace to a pre-set temperature; adjusting a numerical value of a magnetic field gradient product by using a magnetic field generator; generating a special magnetic field gradient product constant area in a space area, where a sample to be measured and a sample tube are arranged, inside the vacuum furnace; enabling the sample to be measured and the sample tube to be entirely located in the magnetic field gradient product constant area formed by the magnetic field generator; respectively measuring masses of the sample to be measured and the sample tube with different magnetic field gradient products at the pre-set temperature through an electronic balance; obtaining a mass magnetic susceptibility of the sample to be measured at a certain temperature through calculation. The invention further provides a measurement device for the substance variable temperature magnetic susceptibility. With the adoption of the measurement method and the measurement device, the problems in the traditional magnetic susceptibility measurement method of larger limitation and error are solved; not only can the magnetic susceptibility of an unknown substance be more accurately measured, but also the magnetic susceptibilities and different crystal orientation magnetic susceptibilities of the substance at different temperatures can be measured.

Description

Technical field [0001] This utility model involves the measurement method and device of the electromagnetic parameter of the substance, especially the measurement method and the device of the measurement of a material magnetization rate.For the field of magnetic performance detection technology for materials. Background technique [0002] Magnetization rate is an important physical quantity of reaction substance magnetic and weakness. When the magnetization rate is positive, the substance is a smooth magnetic substance.At the same time, the substance is anti -magnetic substance.Material magnetic is the vector of electronic rail magnetic torque, electronic spinning magnetic torque and atomic magnetic torque. Therefore, all matter is magnetic.The magnetization rate of the material is closely related to the composition, crystal, weaving, stress, and temperature of the material.For non -iron magnetic substances, its magnetization rate is very small, so the plus magnetic field is very...

Claims

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Application Information

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IPC IPC(8): G01R33/16
Inventor 钟云波董立城王怀刘洪玉刘春梅任维丽黄靖文任光宇任忠鸣
Owner SHANGHAI UNIV
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