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Working principle and application of laser diffraction particle size analyzer
Date: 2025-09-19Read: 0
  Laser diffraction particle size analyzerIt is based on the scattering theory of light. When a parallel laser beam encounters particle obstruction, a portion of the light will scatter, and the size of the scattering angle is related to the size of the particles. The larger the particles, the smaller the θ angle of the scattered light; The smaller the particle, the larger the θ angle of the scattered light. By measuring the scattered light intensity at different angles, the particle size distribution of the sample can be calculated based on Mie scattering theory or Fraunhofer diffraction theory.
  Laser diffraction particle size analyzerApplication scenarios:
1. Industrial production
Cement building materials: Predicting the 28 day strength of cement particles through particle size to guide production process optimization.
Lithium battery materials: Control the particle size distribution of positive and negative electrode materials to improve battery energy density and cycle life.
3D printing: Accurately controlling the particle size of metal or ceramic powders to ensure the mechanical properties and surface accuracy of printed parts.
2. Research field
Nanomaterials: Detecting the aggregation state of nanoparticles (such as silica and carbon nanotubes) and evaluating their distribution uniformity.
Catalyst development: Optimize the activity and reaction efficiency of catalyst particles to enhance energy conversion efficiency.
3. Environmental monitoring
Atmospheric monitoring: Analyze the particle size distribution of aerosols such as PM2.5 and PM10, track pollution sources and health impacts.
Water quality testing: measuring the particle size of suspended solids (sediment, microplastics) in rivers and lakes, and evaluating the degree of pollution.
4. Medicine and Food
Drug quality control: Monitor the uniformity of drug particles to ensure the stability and bioavailability of the formulation.
Food processing: Analyze the particle size of powdered materials such as dairy products and seasonings to optimize taste and processing efficiency.