TABLE 4.
The particle determination and appearance quality evaluation of different PSPs.
| Particle (μm) | α | β | γ | δ | ε |
|---|---|---|---|---|---|
| Laser particle | 5.33 ± 0.516a | 4.62 ± 0.218b | 4.06 ± 0.082c | 3.37 ± 0.034d | 2.47 ± 0.020e |
| Microscope | 5.64 ± 0.966a | 4.67 ± 1.837b | 4.06 ± 1.156c | 3.02 ± 1.333d | 2.18 ± 1.135e |
| SEM | 6.66 ± 1.056a | 6.04 ± 1.460b | 5.27 ± 0.690c | 3.55 ± 0.688d | 2.95 ± 0.519e |
| Yield | 78.03% | 88.56% | 88.14% | 92.80% | 93.63% |
| Exterior | Powdery | Powdery | Powdery | Powdery | Powdery |
| Color | Light yellow | Light yellow | Khaki | Brownish yellow | Grayish white |
| Touch | Fine powder feeling, no obvious graininess | Fine powder feeling, no obvious graininess | Fine powder feeling, no obvious graininess | Fine powder feeling, no obvious graininess | Very fine powder, no graininess |
The different letter superscripts including α-ε indicate the particle from 6.66 to 2.95 μm and a-e indicate significant differences at p < 0.05.