... : <1um, 98%, L/D >=20 3. Composite 4. Coating 5. Ceramic Micron ScaleSubmicron ScaleDiameter0.1-2.5um<1umPurity99%98% L/D ... ceramics, functional ceramics, bulletproof ceramics, piezoelectric ceramics, ceramic seals, thermocouple device, ceramic bearing, heat-resistant ceramic, ceramic grassroots, high-frequency ceramics, textile ceramics, wear-resisting ...