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Spherical silica powder
Spherical silica powder
【基本說明】：Spherical silica powder refers to the spherical silicon dioxide powder material made of irregular corner silicon powder by process of flame and fusion method. It is featured by small surface area, good liquidity and low stress.
【應用范圍】：
>Basic characteristics of Spherical silica powder：
| Item | Unit | Typical Value |
|---|---|---|
| Appearance | / | White powder |
| Particle morphology | / | Spherical |
| Density | kg/m3 | 2.20×103 |
| Mohs Hardness | / | 6.0 |
| Dielectric Constant | / | 3.88（1MHz） |
| Dielectric Loss | / | 0.0002（1MHz） |
| Coefficient of Linear Expansion | 1/K | 0.5×10-6 |
| Thermal Conductivity | W/K·m | 1.1 |
| Refraction Coefficient | / | 1.45 |
>Spherical silica powder can be sorted on basis of following characteristics and prepared as required by customers:
| Item | Index of Correction | Introduction |
|---|---|---|
| Purity | SiO2content | Available within 98.0-99.9% |
| Ion impurity | Na+、Cl-,etc. | Can be reduced below 1ppm |
| Particle size distribution | D50 | Available within D50=2-50μm |
| Particle size distribution | May be adjusted on basis of typical distribution as needed, including multimodal distribution and narrow-range distribution. | |
| Appearance characteristics | Surface characteristics | 0.5-30m2/g Controllable. |
| Hydrophobicity and oil absorption | Treatment agent of different functions may be selected as needed by customer |
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