SMIDA Mixer for LED Phosphor & Silicone Compounds
Color consistency decides the fate of an LED batch.
Phosphor powder agglomerates easily, and when it is not fully dispersed in silicone, the symptoms are unmistakable: color-temperature drift, uneven light distribution, and brightness falloff.
Add air bubbles and light extraction drops further.
SMIDA planetary centrifugal mixers are built to keep phosphor-silicone compounds uniform, bubble-free, and reproducible:
•Blade-free mixing.
The phosphor only touches the cup — no contamination, and switching between phosphor colors takes minutes, not a cleaning shift.
•Vacuum degassing.
The optional vacuum system (down to 0.2 kPa) pulls microbubbles out during the same cycle, protecting light output.
•Independent speed control.
Revolution and rotation can be tuned separately to match the particle size and viscosity of your phosphor system.
•Temperature control option.
TTC models hold -15 °C to 25 °C for heat-sensitive phosphors and fast-curing systems.
The Process in Three Steps
1.Premix phosphor and silicone at low speed (200–500 rpm) to wet the powder;
2.Disperse at medium-high speed (1500–2000 rpm) to break up agglomerates;
3.Degas under vacuum (0.2 kPa-class) to remove microbubbles.
The result is a transparent, homogeneous compound with stable chromaticity, batch after batch.
Quick Answers
Why do my LEDs show color shift?
Usually incomplete dispersion: undispersed phosphor and trapped air scatter light unevenly.
Can one machine handle different phosphors?
Yes — cup-based mixing means no shared mixing head; just change cups.
What capacity do I need?
From 1 g R&D samples to multi-kilogram production with the TMV-10000TT and larger models.
For the full 3-step process guide, read LED Phosphor Dispersion: A 3-Step Process.
