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Precipitate Formation and Particle Size Control01:16

Precipitate Formation and Particle Size Control

In precipitation gravimetry, the precipitating agent should react specifically or selectively with the analyte. While a specific reagent reacts with the analyte alone, a selective reagent can react with a limited number of chemical species.
The obtained precipitate should be either a pure substance of known composition or easily converted to one by a simple process, such as ignition or drying. In addition, the precipitate should be insoluble and easily filterable. In general, filterability...

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Simultaneous Efficient Fragmentation and Spheroidization: Cyclone Atomization Enables Defect-Free, High-Yield FeNi50

Kai Kang1, Shasha Huang2, Kuanguang Hu3

  • 1School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China.

Materials (Basel, Switzerland)
|July 15, 2026
PubMed
Summary

Cyclone atomization significantly improves FeNi50 powder production by increasing fine powder yield and reducing particle size. This method yields spherical, dense particles suitable for high-performance magnetic cores.

Keywords:
FeNi50 powderatomization pressurecyclone atomizationmicrostructure evolutionspherical particles

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Area of Science:

  • Materials Science
  • Powder Metallurgy
  • Nanotechnology

Background:

  • FeNi50 powder is crucial for metallic magnetic cores.
  • Current production methods face challenges like low fine powder yield and particle defects (e.g., hollow particles).

Purpose of the Study:

  • To optimize FeNi50 powder production using cyclone atomization.
  • To investigate the impact of atomization pressure on powder characteristics.

Main Methods:

  • Cyclone atomization technique.
  • Systematic variation of atomization pressure (1-6 MPa).
  • Combined simulation, experimental, and theoretical analysis.

Main Results:

  • Increased atomization pressure reduced average particle size (D50) from 80.7 μm to 27.9 μm.
  • Fine powder yield (-500 mesh) increased from 19.4% to 50.0%, surpassing other methods.
  • Produced spherical, dense particles with refined grain structures and suppressed impurity absorption.

Conclusions:

  • Cyclone atomization is a promising method for high-quality FeNi50 powder production.
  • Optimized pressure enhances powder characteristics for magnetic applications.
  • The method is suitable for large-scale manufacturing of high-performance magnetic powder cores.