Ultrafine High-Whiteness Silica Powder
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- Address:連云港經(jīng)濟(jì)技術(shù)開發(fā)區(qū)大浦工業(yè)區(qū)先鋒路1號, Zip: 222000
- Contact: 楊雪
- :0518-86070855 86070856
- :sale@guikepharm.com
Other Products
High-whiteness ultrafine silica powder, active ultrafine silica powder, transparent ultrafine silica powder
Crystalline silica powder
Crystalline silica powder is an alpha-crystalline silicon dioxide powder material processed from natural quartz through sorting, crushing, purification, grinding, classification, and other procedures.
Crystalline silica powder
Silica powder is a neutral inorganic filler with highly stable physical and chemical properties. It contains no crystalline water, does not participate in curing reactions, and does not affect the reaction mechanism.
1. It has good wettability with various resins, excellent adsorption properties, is easy to mix, and does not cause agglomeration.
2. The particle size distribution of silica powder is reasonable, with strong density, high hardness, and good wear resistance, significantly improving the tensile strength, compressive strength, impact resistance, and wear resistance of cured products.
3. It can increase thermal conductivity, modify adhesion, and enhance flame retardancy.
4. It can reduce the exothermic peak temperature of epoxy resin curing reactions, decrease the linear expansion coefficient and shrinkage rate of cured products, thereby eliminating internal stress and preventing cracking.
5. Due to its fine particle size and reasonable distribution, it effectively reduces and eliminates sedimentation and stratification.
6. Silica powder is of high purity with low impurity content and stable physicochemical properties, giving cured products excellent insulation and arc resistance.
7. The chemical composition of silica powder is silicon dioxide (SiO2), an inert substance that does not react with most acids and bases. It distributes uniformly and covers the surface of objects, providing strong corrosion resistance.
8. Adding silica powder can reduce the cost of various products.
Basic characteristics of the 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) |
| Linear expansion coefficient | 1/K | 14×10?? |
| Thermal conductivity | W/K·m | 12.6 |
| Refractive index | / | 1.54 |
>Crystalline silica powder can be differentiated and customized based on the following characteristics according to customer requirements:
| Item | Related Indicators | Description | |||||||||||||||||||||||||||||||||||||||||||||||
| Purity | SiO? content | Selectable within 98.0-99.9% | |||||||||||||||||||||||||||||||||||||||||||||||
| Ionic impurities | Na?, Cl?, etc. | Can be as low as below 3ppm | |||||||||||||||||||||||||||||||||||||||||||||||
| Particle size distribution | D50 | D50 selectable within 0.5-50μm | |||||||||||||||||||||||||||||||||||||||||||||||
| Particle size distribution | Adjustable based on typical distribution requirements, including multimodal distribution, narrow distribution, etc. | ||||||||||||||||||||||||||||||||||||||||||||||||
| Appearance characteristics | Whiteness, transparency, etc. | Whiteness selectable in the range of 60-98; high transparency products available. | |||||||||||||||||||||||||||||||||||||||||||||||
| Surface characteristics | Hydrophobicity, oil absorption value, etc. | Different functional treatment agents can be selected according to customer requirements for crystalline silica powder. Crystalline silica powder is an alpha-crystalline silicon dioxide powder material processed from natural quartz through sorting, crushing, purification, grinding, classification, and other procedures. Crystalline silica powder Silica powder is a neutral inorganic filler with highly stable physical and chemical properties. It contains no crystalline water, does not participate in curing reactions, and does not affect the reaction mechanism. 1. It has good wettability with various resins, excellent adsorption properties, is easy to mix, and does not cause agglomeration. 2. The particle size distribution of silica powder is reasonable, with strong density, high hardness, and good wear resistance, significantly improving the tensile strength, compressive strength, impact resistance, and wear resistance of cured products. 3. It can increase thermal conductivity, modify adhesion, and enhance flame retardancy. 4. It can reduce the exothermic peak temperature of epoxy resin curing reactions, decrease the linear expansion coefficient and shrinkage rate of cured products, thereby eliminating internal stress and preventing cracking. 5. Due to its fine particle size and reasonable distribution, it effectively reduces and eliminates sedimentation and stratification. 6. Silica powder is of high purity with low impurity content and stable physicochemical properties, giving cured products excellent insulation and arc resistance. 7. The chemical composition of silica powder is silicon dioxide (SiO2), an inert substance that does not react with most acids and bases. It distributes uniformly and covers the surface of objects, providing strong corrosion resistance. 8. Adding silica powder can reduce the cost of various products. Basic characteristics of the powder:
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