Magnetic susceptibility measuring device and method based on magneto-Archimedes levitation

A measurement device and magnetic susceptibility technology, applied in the field of measurement, can solve the problems of single measurement object, complicated operation process, inconvenient scientific research and engineering application, etc.

Inactive Publication Date: 2014-08-27
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above two methods are inconvenient to study the relationship between the magnetic susceptibility of the sample and the temperature change.
The experimental steps of the Faraday method are cumbersome and the operation process is relatively complicated, which brings inconvenience to scientific research and engineering applications
The AC mutual inductance measurement method is mainly suitable for the measurement of metal magnetic susceptibility, which is highly targeted and the measurement object is relatively single.
In recent years, new methods such as laser pendulum method and NMR bispectrometer method have been proposed to measure the magnetic susceptibility. However, these methods are more suitable for measuring the magnetic susceptibility of transition element ion compounds, and the scope of application is relatively narrow.

Method used

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  • Magnetic susceptibility measuring device and method based on magneto-Archimedes levitation
  • Magnetic susceptibility measuring device and method based on magneto-Archimedes levitation
  • Magnetic susceptibility measuring device and method based on magneto-Archimedes levitation

Examples

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Effect test

Embodiment 1

[0063] In this embodiment, both the first electromagnet 11 and the second electromagnet 6 are DC electromagnets with a diameter of 80mm, a height of 70mm, and a surface suction force of 120N to 290N. The measurement container is a transparent glass cylindrical container with a diameter of 10mm and a height of 45mm. The effect of the standard solution injected into the measurement container on the sample and the suspension of the sample can be observed through an external camera device, which transmits the image to the computer at any time. Recording, data acquisition of the image, measurement of the suspension height of the granular sample by the ruler of the measuring container.

[0064] Manganese chloride solution with known density and magnetic susceptibility is used as a paramagnetic medium, that is, a standard solution, and its density is 1.24g / cm 3 , with a magnetic susceptibility of 1.41×10 -4 . Take the density as 1.180g / cm 3 Silica gel is used as the granular sampl...

Embodiment 2

[0105] The magnetic susceptibility measuring device of this embodiment is the same as that of Embodiment 1.

[0106] In this embodiment, the manganese chloride solution with known density and magnetic susceptibility is used as paramagnetic medium and standard solution, and its density is 1.27g / cm 3 , with a magnetic susceptibility of 1.45×10 -4 , take the density as 2.230g / cm 3 Silica is the substance to be tested.

[0107] The selected manganese chloride solution is injected into the measuring container as a paramagnetic medium, then the granular sample is placed in the paramagnetic medium (standard solution), and the measuring container is placed in the magnetic field space between the two electromagnets, so that The electromagnet and the measuring container are in a coaxial vertical direction.

[0108] The method for measuring magnetic susceptibility by using the above-mentioned magnetic susceptibility measuring device based on magnetic Archimedes levitation, such as i...

Embodiment 3

[0136] The magnetic susceptibility measuring device of this embodiment is the same as that of Embodiment 1.

[0137] The manganese chloride solution with known density and magnetic susceptibility is used as the paramagnetic medium, that is, the standard solution, and its density is 1.10g / cm 3 , the magnetic susceptibility is 1.25×10 -4 . Take the density as 1.050g / cm 3 Polystyrene is the granular sample to be tested.

[0138] The experimental conditions and experimental operation are the same as in Example 2, the current is adjusted so that the surface magnetic induction of the electromagnet is 0.4T, and the suspension height of the granular sample to be measured can be obtained as 7.6mm by measuring the scale scale of the container, and the measured particle is obtained according to the calculation. The magnetic susceptibility χ of the granular sample s -2.78×10 -6 . The error between the measured value and the standard value is 0.48%, and the measurement accuracy is hi...

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Abstract

The invention provides a magnetic susceptibility measuring device based on magneto-Archimedes levitation. The device comprises a magnetic field generating device, a measuring container, a magnetic field regulating device and a remote observing system, wherein the measuring container is placed in the magnetic field generating device, the magnetic field generating device comprises an upper support, a lower support, a first electromagnet and a second electromagnet, the upper support and the lower support are fixed through four screws matched with nuts, the first electromagnet is placed in the hollow portion of the upper support, the second electromagnet is placed in the hollow portion of the lower support, the same magnetic poles of the first electromagnet and the second electromagnet are opposite, the first electromagnet and the second electromagnet are connected in parallel and then connected with the magnetic field regulating device in series, and the remote observing system comprises a camera and a computer. According to the magnetic susceptibility measuring device based on magneto-Archimedes levitation, magnetic induction intensity can be effectively controlled through the magnetic field regulating device, and then a wider magnetic susceptibility measurement range is realized; the distance between the two electromagnets can be adjusted as needed during measurement, measuring span is enlarged, and the flexibility of the device is improved greatly.

Description

technical field [0001] The invention belongs to the technical field of measurement, and in particular relates to a magnetic susceptibility measurement device and method based on magnetic Archimedes levitation. Background technique [0002] Magnetic susceptibility is an important physical quantity that describes the magnetization properties of a substance. According to the electronic theory of matter structure, it can be proved that the magnetic susceptibility of matter has a very close relationship with its microstructure. By measuring the magnetic susceptibility of these substances, a lot of information about their microstructure can be obtained. Magnetic susceptibility has important applications in judging whether there are unpaired electrons in the substance molecule and the structure type of the complex. Calculating the number of unpaired electrons in a molecule by measuring the magnetic susceptibility of a substance is an effective method for studying the bonding situ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/16
Inventor 王强王俊廖静马琳
Owner NORTHEASTERN UNIV LIAONING
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