Silicon Dioxide (SiO₂) is the second most abundant natural inorganic mineral in the Earth’s crust. After purification and synthesis, it is widely used in construction materials, rubber, electronics, cosmetics and other fields, serving as a key material for both basic and high-end manufacturing.
1.Production processes (two routes)
(1)Natural mineral purification method
Uses quartzite, quartz sand, diatomite as raw materials; removes Fe/Al impurities via crushing, grinding and flotation. SiO₂ purity ≥98.5%, cost-effective, suitable for construction materials, coatings and other general applications.
(2)Chemical synthesis method
Uses silanes and silicates as raw materials; produced by fumed/precipitation process with AI temperature control and vacuum reaction. Purity up to 99.9%+, particle size controllable from nano to micron. Ideal for electronics, semiconductors, high-end cosmetics; accounts for over 60% of the high-end market。
2.Core Features
（1）High temperature & weather resistance, melting point ~1800℃, UV-resistant, no aging or decomposition after long-term outdoor use
（2）Eco-friendly & non-toxic, heavy-metal free, compliant with EU REACH & RoHS; safe for food contact, children’s products, cosmetics
（3）Reinforcement & toughening, high specific surface area; improves tensile strength by 30%–50% in rubber/plastics
（4）Porous adsorption & dispersion; used as matting agent, desiccant, prevents stratification & sedimentation
3.Application industries
（1）Construction Materials
Strengthens wear resistance in concrete/mortar; acts as filler/matting agent in coatings/waterproofing to boost adhesion and weatherability.
（2）Rubber and Plastics
Reinforces tires, seals, cable sheaths; enhances rigidity & heat resistance in pipes, appliance housings, food packaging. Purchased by over 40% of leading rubber enterprises.
（3）Cosmetics and Refractories
Nano-grade used for oil control & makeup setting; high-melting-point grade for refractory bricks & abrasives in metallurgy & machining.
4.Procurement Standards
Qualifications: comply with GB/T 30916-2014, ISO certification; REACH/FDA for export. Specifications: purity, particle size/specific surface area, moisture ≤1%, residue ≤0.1%. Conduct small-batch compatibility test first; prioritize audited suppliers with customization & after-sales technical support.
