- Average particle size 3.0μm max, white powder.
- Particle size distribution is narrow and does not contain large particles.
- The particle is disc-shaped or strip-shaped with no broken surfaces (disk thickness of 0.1μm or less).

- Average particle size 3.0μm max, white powder.
- Particle size distribution is narrow and does not contain large particles.
- The particle is disc-shaped or strip-shaped with no broken surfaces (disk thickness of 0.1μm or less).
