A method for measuring the degree of agglomeration of non-ferromagnetic powder in a suspension system

A non-ferromagnetic, measurement method technology, applied in the direction of measuring devices, nuclear magnetic resonance analysis, instruments, etc., can solve the problems of difficult comparison of dispersion effects, achieve improved production process and product performance, simple process and good repeatability Effect

Inactive Publication Date: 2021-03-12
SHANGHAI UNIV OF MEDICINE & HEALTH SCI
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Problems solved by technology

[0009] In order to solve the problems existing in the prior art, the present invention provides a method for measuring the degree of agglomeration of non-ferromagnetic powders in a water-based suspension system, using nuclear magnetic resonance technology to measure the degree of agglomeration of non-ferromagnetic powders in a suspension system, which is used to solve It is difficult to compare the dispersion effect of powder materials in different aqueous solution environments and different concentrations, so as to achieve the purpose of scientifically evaluating the state of powder agglomeration

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  • A method for measuring the degree of agglomeration of non-ferromagnetic powder in a suspension system

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Embodiment

[0037] A method for measuring the degree of agglomeration of non-ferromagnetic powder in a suspension system, comprising the following steps:

[0038] (1) Prepare powder suspension solutions with different solid content ω, the solute is non-ferromagnetic powder, and the solvent is water;

[0039] (2) The solution prepared in step (1) was diluted with pure water in series, and then the T 2 relaxation time and calculate the relaxation rate R 2 , R 2f , where R 2 , R 2f are the relaxation rates of the powder particle suspension system and the solvent, that is, the corresponding T 2 The reciprocal of the relaxation time; finally obtain the ω' value of the powder suspension solution with different solid content when the powder is completely dispersed, and ω' is the solid content of the powder material when it is completely dispersed in an ideal state;

[0040] (3) Calculate the powder agglomeration degree φ (%) in the suspension system:

[0041] φ(%)=1-(S 覆盖面积 / S 总表面面积 )

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Abstract

The invention discloses a method for measuring the agglomeration degree of non-ferromagnetic powder in a suspension system, which comprises the following steps: (1) preparing powder suspension solutions with different solid contents ω; (2) performing a series of dilutions on the above solutions with pure water respectively , and then use nuclear magnetic resonance technology to measure the T 2 relaxation time and calculate the relaxation rate R 2 , R 2f ; (3) Calculate the powder agglomeration degree φ (%) in the suspension system; (4) Draw the corresponding relationship curve between the powder material agglomeration degree φ (%) and its different solid content ω in the system, which is used to evaluate the powder Dispersion of bulk materials. The invention is simple and feasible in operation, can effectively evaluate the dispersion difference of powder particles in a suspension system, achieves the purpose of scientifically characterizing the agglomeration degree of powder materials, and is beneficial to improving the production process and product performance of powder materials.

Description

technical field [0001] The invention relates to a method for measuring the degree of agglomeration of non-ferromagnetic powder in a suspension system, in particular to a method for measuring the degree of agglomeration of non-ferromagnetic powder in a suspension system using nuclear magnetic resonance technology. Background technique [0002] Powder materials with basic particle sizes at the submicron and nanometer levels endow the above materials with special properties due to small size effects, surface effects, quantum size effects, or macroscopic quantum tunneling effects. Scientifically characterizing the agglomeration state (degree of agglomeration) of the above-mentioned powder materials and establishing an agglomeration parameter that accurately describes its structure is of great significance for its application in medicine, materials, biology, environment, manufacturing, energy, food and other fields. [0003] Taking nanomaterials as an example, due to their small ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N24/08
CPCG01N24/082
Inventor 黄钢杨培强杨翼
Owner SHANGHAI UNIV OF MEDICINE & HEALTH SCI
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