What should we know when buying quartz powder?

   Cristobalite powder is made of quartz ore from vein by high temperature calcination at about 1500 ℃, pollution-free grinding, magnetic separation and classification. The silicon content is more than 99.8%, the crystal phase is tetragonal system, the hardness is about 6.5, the density is 2.45, the specific surface is large, the porosity is high, the weather resistance is good, the precipitation resistance is good, and the thermal shock resistance is good. What are the characteristics of quartz powder? Lianyungang Haosen mineral products Co., Ltd. takes you to know some knowledge about the purchase of silicon powder.

Main features:

1. Excellent optical properties. The refractive index of cristobalite decreases from 1.55 to 1.48, which is closer to that of PE, PP and some resins. The mixed resin is transparent and does not cover the color of the pigment itself, while filling with other fillers will lighten and distort the color of the pigment.

2. High reflectivity. The specific structure of cristobalite is helpful for light reflection and can replace glass beads as reflective paint, which can not only enhance the skid resistance, but also improve the reflective property of paint.

3. High whiteness, low density, bright color. The whiteness of cristobalite is more than 95%. It can be used in coatings and paints to replace part of titanium dioxide and reduce the formulation cost.

4. Corrosion resistant, scratch resistant and scrub resistant.

5. No organic pollution, low metal content. It can enhance the UV resistance of the coating and has good insulation.

6. Excellent thermal shock resistance. When cristobalite is heated at about 220-240 ℃, a certain degree of thermal expansion occurs, which just compensates the shrinkage of epoxy resin and gypsum during curing reaction at this temperature and makes the casting body not deformed.