Spherical Silica Powder Supplier for Electronics and Cosmetics
KOSNANO’s spherical silica powder (SiO2) is a high-performance, highly filled, ultrafine powder material with a sphericity exceeding 95%. As a source manufacturer of high-purity spherical silica, KOSNANO provides fine spherical silica with a particle size range of 0.5-75 μm and a purity >= 99.9%. The product boasts a high true specific gravity of 2.2 g/cm³, extremely low electrical conductivity (<= 5.0 uS/cm), and strictly controlled trace magnetic impurities (Fe <= 5 ppm), making it a core rheology modifier for semiconductor chip packaging (EMC) and large-scale integrated circuit electronic underfill.
Technical Specifications & Physical Properties
Property & Parameter | Standard Specification Limit (Fused Amorphous Grade) | Typical Analysis Value (Actual Lab Test) |
Silicon Dioxide Purity (SiO2) | >= 99.9% | 99.93% |
True Density (Specific Gravity) | 2.1 – 2.2 g/cm3 | 2.2 g/cm3 |
Moisture Content (105°C / 2h) | <= 0.10% | 0.04% |
Electrical Conductivity (Extract) | <= 5.0 uS/cm | 2.3 uS/cm |
pH Value (10% Suspension) | 5.5 – 7.5 | 6.4 |
Trace Total Iron (Fe Content) | <= 5 ppm | 2.1 ppm |
Magnetic Impurities (Fe, Ni, Cr) | <= 5 ppm | Passed Blind Audit |
Spherical Rate (Roundness) | >= 92% | 96.4% |
Why choose KOSNANO's spherical silica
Common names: Spherical Silica/Fused Silica/球状シリカ (Kyūjō Silica)/Optical Spherical Silica/Spherical Quartz
1) Quality Assurance: We use high-purity amorphous quartz raw materials, and the product undergoes at least three quality inspections from raw material to finished product, consistently maintaining a roundness of ≥ 95%, ensuring customer peace of mind.
2) Batch-to-Batch Consistency and Stability: We have a mature R&D team and utilize precision laser diffraction particle size analyzers (such as the Mastersizer 2000) to ensure strict particle size distribution (D50 range of 0.5 μm to 75 μm) and absolutely consistent specific surface area (200 ± 20 m²/g) in large-scale commercial production.
3) Sufficient capacity support: We have three standard-compliant production lines with an annual capacity of over 5,000 tons, ensuring a stable supply.
4) Global Shipping and Compliance: KOSNANO has over 15 years of experience in industrial B2B exports and adheres to the ISO quality management system, ensuring smooth customs clearance. We provide accurate HS codes (2811220000), robust container pallet packaging, and highly secure double-layer PE protective packaging
Advanced Material Insights, Flowability & Custom Modification
1. Why does spherical silica powder significantly improve the flowability and bulk density of epoxy resins? Spherical silica, due to its highly smooth surface and measured sphericity exceeding 95%, creates a “ball bearing” effect within the resin matrix. Compared to amorphous, irregular powders, it not only significantly increases the solid mass filler ratio of composite materials to 70%-90%, but also effectively reduces the coefficient of thermal expansion (CTE) of epoxy molding compounds (EMC) by over 20%, perfectly protecting chips from thermal stress damage.
2. How does KOSNANO ensure the ultra-low trace metal and electrical conductivity required for semiconductors? To meet the stringent high insulation requirements of semiconductor and integrated circuit packaging, our spherical silica maintains a strictly controlled conductivity of <= 5.0 uS/cm (laboratory measurements show it as low as 2.3 uS/cm). Simultaneously, through multiple strong magnetic separation processes, the total amount of magnetic foreign matter (Fe, Ni, Cr) is limited to below 5 ppm, completely eliminating the risk of leakage and short circuits in electronic components under long-term high-temperature and high-pressure operation.
3. What are the operational advantages of choosing between hydrophilic and hydrophobic surface treatments? We offer hydrophilic and hydrophobic spherical silica nanoparticles modified with silane coupling agents, with moisture content controlled below 0.1%. After surface modification, the dispersion index of the powder in organic phases and silicone rubber systems can reach over 96%, completely eliminating the agglomeration of nanoparticles during high-speed mixing, perfectly meeting the high light transmittance and excellent rheological properties required for LED optical adhesives.
Related Products
spherical silica 30-75 μm
Custom Functional Formulations: KOSNANO actively supports custom engineering for specialized morphologies, including chain-like fumed silica, porous silica spheres, and ultra-stable silica aqueous dispersions.
Whether you need spherical silica powder, chain-like fumed silica, needle-like silica, lipophilic nano-silica, silica aqueous dispersion, or nano-silica powder, the KOSNANO team can provide you with silica of various particle sizes to meet your different application needs. —— When buy silica, KOSNANO will be your reliable choice!