... ,300nm 500nm,1000nm,2800nm professioal factory 8 years usage supply technology support 1. Particle size:8nm40-60nm100nm300nm500nm1000nm2800nm2. Purity: 99.8% 3. MagneticNano ... Fe Oxide Powder Fe3O4 application range:1. Chemical industry, plastic, textile, painting, rubber, pigment, sealing, etc.2 ...