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Crystalline silica powder
Crystalline silica powder
【大体阐述】：The crystalline silica powder refers to ɑ-crystalline silica powder made of natural quartz through such processes as sorting, crushing, grinding and classifying.【应用范围】：
>Basic characteristics of crystalline silica powder：
| Item | Unit | Typical Value |
|---|---|---|
| Appearance | / | White powder |
| Density | kg/m3 | 2.65×103 |
| Mohs Hardness | / | 7 |
| Dielectric Constant | / | 4.65（1MHz） |
| Dielectric Loss | / | 0.0018（1MHz） |
| Coefficient of Linear Expansion | 1/K | 14×10-6 |
| Thermal Conductivity | W/K·m | 12.6 |
| Refraction Coefficient | / | 1.54 |
>Crystalline 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 3ppm |
| Particle size distribution | D50 | Available within D50=0.5-50µm |
| Particle size distribution | May be adjusted on basis of typical distribution as needed, including multimodal distribution and narrow-range distribution. | |
| Appearance characteristics | Whiteness and transparency | Whiteness is within 60-98, high-transparency product is available. |
| Surface characteristics | Hydrophobicity and oil absorption | Treatment agent of different functions may be selected as needed by customer |
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