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1、 Common range of working frequency

• Typical frequency rangeUsually in20~40kHzbetween.

• For example, when processing fine powders such as lithium iron phosphate and lithium cobalt oxide as positive electrode materials for lithium batteries, the commonly used frequency is25~35kHzIt can avoid screen fatigue caused by high frequency and effectively disperse agglomerated particles through high-frequency vibration.

• Some specialized equipment may increase the frequency for high adsorption materials (such as nanoscale negative electrode materials)35~40kHzTo enhance the cavitation effect and material suspension effect of ultrasound.

• Frequency selection criteria：

• Material GranularityThe finer the particle size (such as micrometer or nanometer), the higher the required frequency to ensure that the particles remain suspended under high-frequency vibration and avoid clogging.

• mesh countHigh mesh screens (such as 300 mesh and above) correspond to higher frequencies to prevent fine particles from accumulating on the surface of the screen.

2、 Common range of amplitude

• Typical amplitude rangeGenerally, it is10~100μm（0.01~0.1mm）.

• In conventional screening scenarios (such as lithium battery material grading), the amplitude is often controlled within20~50μmIt can ensure the jumping motion of materials on the screen surface and avoid particle breakage or screen damage caused by excessive amplitude.

• For high hardness or easily agglomerated materials, the amplitude may be adjusted to50~80μmBy using stronger mechanical vibration energy to break the adsorption force between particles.

• Factors affecting amplitude：

• Material CharacteristicsMaterials with high density and viscosity, such as impurity particles in electrolytes, require larger amplitudes to overcome gravity and surface tension, ensuring screening efficiency.

• Equipment powerThe power of the ultrasonic vibration system (such as 100~500W) is positively correlated with the amplitude. The higher the power, the larger the amplitude may be, but the parameters need to be optimized based on the strength of the sieve.

3、 The synergistic effect of frequency and amplitude

• High frequency low amplitudeSuitable for fine screening (such as controlling the particle size of battery materials within 5-10 μ m), it can reduce particle damage and prevent fine particles from clogging the mesh through high-frequency vibration.

• Low frequency high amplitudeSuitable for coarse particle screening or high viscosity materials, it pushes the material to move with greater mechanical force to avoid material accumulation.

4、 Parameter adjustment in practical applications

• Case study of lithium battery materials：

• When screening lithium iron phosphate (D50 ≈ 5 μ m), it is commonly used30kHz frequency+30 μ m amplitudeIt can disperse and agglomerate particles while ensuring the lifespan of the sieve (avoiding high-frequency wear).

• When dealing with graphite negative electrode materials (D50 ≈ 15 μ m), it may be necessary to use25kHz frequency+50 μ m amplitudeBy using lower frequency and larger amplitude to push particles through the sieve, while reducing the damage to the graphite layer structure.

• Adjustment principle：

1. First, fix the frequency and fine tune the amplitude to observe the screening efficiency (such as screening rate and production capacity);

2. If there is a network blockage, prioritize increasing the frequency; If the material is screened slowly, the amplitude can be increased appropriately.

5、 Typical parameter reference for equipment manufacturers

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