White aluminum oxide particle size
White aluminum oxide abrasive is a man-made abrasive. Its production method is very complicated. It is made by a special smelting process. The white aluminum oxide is then processed by crushing and shaping, magnetic separation and iron removal, and sieved into various particle sizes.
How to detect the particle size of white aluminum oxide?
Sieving Method
Advantages: Simple, intuitive, low-cost equipment, commonly used for samples larger than 40 μm.
Disadvantages: Results are significantly affected by human factors and sieve hole deformation.
Microscopy (Image) Method
Advantages: Simple, intuitive, capable of topographic analysis, and suitable for samples with a narrow particle size distribution (maximum to minimum particle size ratio less than 10:1).
Disadvantages: Poor representativeness, cumbersome to analyze samples with a wide distribution range, and incapable of analyzing samples smaller than 1 μm.
Sedimentation Method
Advantages: Gradual operation, continuous instrument operation, low price, good accuracy and repeatability, and a wide test range. Disadvantages: Long test time and cumbersome operation.
Electrical resistance method
Advantages: Gradual operation allows for particle count measurement, clear equivalent concepts, fast speed, and good accuracy.
Disadvantages: Unsuitable for measuring samples with particles smaller than 0.1 μm. Changing the small-bore tube is cumbersome for samples with a wide white aluminum oxide particle size distribution.
Laser Method
Advantages: Easy operation, fast test speed, wide test range, good repeatability and accuracy, and capable of online and dry measurement.
Disadvantages: Results are significantly affected by the distribution model, instrument cost is high, and resolution is low.
Electron Microscopy
Advantages: Suitable for testing ultra-high-density particles and even nanoparticles; high resolution, capable of morphological and structural analysis.
Disadvantages: Limited sample size, poor representativeness, measurement susceptible to human error, and expensive instrumentation.
Light Obscuration Method
Advantages: Convenient and fast testing, capable of measuring particle counts in liquids or gases, and high resolution.
Disadvantages: Not suitable for samples with particle sizes less than 1 μm, requires a sophisticated system, and is only suitable for measuring dust, contaminants, or diluted pharmaceuticals; it is rarely used for general powders.
Permeability Method
Advantages: Low instrument price. No sample dispersion required, suitable for measuring powdered materials.
Disadvantages: Only average particle size can be obtained, not particle size distribution; cannot measure fine powders smaller than 5µm.
Small-angle X-ray scattering
Used for measuring the particle size of nanoparticles.
White aluminum oxide photon correlation spectroscopy (dynamic light scattering)
Used for particle size measurement of nanoparticles.
