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

A measurement method, ferromagnetic technology, applied in the direction of nuclear magnetic resonance analysis, etc., can solve the problem of difficult comparison of dispersion effect, achieve the effect of improving production process and product performance, simple process and good repeatability
CN108872287BInactive Publication Date: 2021-03-26SHANGHAI UNIV OF MEDICINE & HEALTH SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI UNIV OF MEDICINE & HEALTH SCI
Publication Date
2021-03-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a determination method for an agglomeration degree of ferromagnetism powder in a suspension system. The determination method comprises the following steps: (1) preparing different solid contents omega of powder suspension solutions; (2) utilizing pure water to respectively and serially dilute the solutions, then utilizing a nuclear magnetic resonance technology for respectively measuring T2 relaxation time of the pure water and T2 relaxation time of the different gradient concentrations of diluted powder suspension solution samples and calculating out relaxation rates R2 and R2f; (3) calculating out the agglomeration degree phi (%) of powder in the suspension system; (4) drawing a corresponding relation curve between the agglomeration degrees phi (%) of the powder materials and the powder materials under different solid contents omega in the system and using the corresponding relation curve to evaluate dispersity difference of the powder materials. The determination method disclosed by the invention is simple and practical to operate, can effectively evaluate dispersity difference of powder particles in the suspension system, achieves the purpose of scientifically representing the agglomeration degrees of the powder materials and is favorable for improving powder material production technologies and product performance.
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Description

Technical field

[0001] The present invention relates to a method of determining the degree of ferromagnetic powder in a suspension system, and more particularly to a method for determining the ferromagnetic powder in a suspension system using nuclear magnetic resonance techniques. Background technique

[0002] The basic particle size is in submicron, and the nanometer powder material gives the above material special properties due to small dimensional effects, surface effects, quantum dimensional effects, or macro quantum tunneling effects. Scientifically characterize the aggregation state of the above powder material (degree of agglomeration), establishing an accurate description of the aggregation parameters of its structure, is of great significance for its application in the fields of medical, materials, biology, environment, manufacturing, energy, food and other fields.

[0003] Taking nanomaterials as an example, due to its small size, the specific surface area is large, th...

Claims

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