Refined high-purity ultra-fine quartz powder (SiO2)

Refined high-purity ultra-fine quartz powder (SiO2)

This non-metallic silica mineral powder is produced through a multi-step processing of natural quartz (SiO2) or fused quartz (amorphous SiO2 formed by high-temperature melting and cooling of natural quartz). The manufacturing process includes crushing, ball milling (or vibration and air-jet milling), flotation, and acid leaching. The resulting powder exhibits high hardness, low oil absorption, excellent dry dispersibility, outstanding anti-settling properties, good flowability, strong stability, acid and corrosion resistance, as well as resistance to abrasion and wear.

Our company specializes in the production, R&D, and sales of high-purity ultra-fine quartz/silica powders with diverse mesh sizes and specifications. These materials are widely used in various industries due to their exceptional properties, including excellent temperature resistance, acid/alkali corrosion resistance, poor thermal conductivity, high insulation, low thermal expansion, chemical stability, and high hardness. They are applied in silicones, potting compounds, epoxy adhesives, dry-hanging adhesives, AB adhesives, thermal conductive adhesives, floor coatings, powder coatings, abrasive materials, photovoltaic glass, electronic components, plastics, artificial quartz, polishing waxes, ceramics, water treatment filtration systems, rubber, high-temperature casting, molten blocks, glass, and fiberglass pipes. Our products are renowned for their consistent quality and comprehensive specifications.

2. Technical specifications of conventional refined high-grade white quartz powder:

Technical specifications of high purity refined high white quartz powder:

III. Technical Performance Analysis of Refined High-Purity White Quartz Powder:

(1) The whiteness reaches 95-97%, significantly enhancing both the product's brightness and transparency.

(II) Excellent heat resistance and corrosion resistance, good insulation performance and arc resistance

(3) High hardness and excellent wear resistance, significantly enhancing the tensile, compressive, and impact strength of the coating or cured product. (3) High hardness and excellent wear resistance, significantly enhancing the tensile, compressive, and impact strength of the coating or cured product.

(4) It has good wettability and adsorption performance for various resins, easy to mix without agglomeration, reasonable particle size distribution, and can effectively reduce and eliminate precipitation and stratification.

(5) It has low oil absorption, can increase the critical volume concentration of the base material, reduce the amount of resin, and lower the cost. At the same time, it can reduce the exothermic temperature of the epoxy resin curing reaction, decrease the linear expansion coefficient and shrinkage rate of the cured material, thereby eliminating internal stress and preventing cracking.

4、Characteristics of refined high white quartz powder

1. The product features high purity, excellent whiteness, and controllable, adjustable particle size with uniform distribution;

2. Low ionic content and low conductivity, with excellent electrical insulation properties;

3. Mohs hardness 7.0, featuring high hardness, rigidity, and excellent wear/scratch resistance;

4、The oil absorption is low, the viscosity is low, the dispersion and fluidity are good;

5、With an refractive index of 1.54-1.55 and low birefringence, it exhibits exceptional and unique optical properties.

6、The thermal expansion coefficient is 0.5×10⁻⁶/k, extremely low, and can withstand thermal shock;

7. High insulation with non-conductive properties, exhibiting a thermal conductivity of 7.6 (W/mK), indicating moderate thermal conductivity.

8. High performance, enhancing the scratch resistance of the coating;

9. Low dielectric constant and dielectric loss are ideal filling materials for electronic and electrical products.

10. Excellent weather resistance, suitable for long-term use in paints, coatings, rubber, plastics and related products.

11. Non-toxic, odorless, and environmentally friendly;

12. It is chemically stable and does not react with any other substances except with HF and strong bases.

5、Application Analysis of Oulite New Material Refined Quartz Powder in Conventional Industry

1-Application of refined quartz powder in paint and coating:

By leveraging the unique functionality of refined quartz powder, it replaces barium sulfate and talcum powder in the formulation of paints, primers, and rust-proof coatings (6-15% by weight). This substitution not only serves as a filler and volume enhancer but also significantly improves paint fineness, leveling performance, film hardness, reduces coating grinding time, and enhances water resistance, rust and corrosion resistance, pigment dispersion, and storage stability. Furthermore, the melt film coating—prepared from silicon micro-powder, water glass, surfactants, and water in specific proportions—proves highly effective in precision casting due to its low viscosity, absence of sagging, and user-friendly application. When used for cabinet finishes, it delivers outstanding decorative effects and corrosion resistance.

2-Applications in rubber products:

Refined quartz powder is incorporated into rubber compounds such as natural rubber and polybutadiene rubber, ensuring easy dispersion, excellent mixing properties, and superior calendering and extrusion performance. It accelerates vulcanization rates and enhances rubber viscosity, particularly when ultra-fine silica micro-powder (average particle size ≤3μm) replaces silica fume as a filler. This substitution significantly improves product physical properties while reducing production costs. Notably, silica micro-powder with 60-70% particle size below 2μm demonstrates exceptional efficacy in export-grade pharmaceutical butyl chloride rubber stoppers and electrical insulation rubber shoes.

3-Applications in electrical insulation packaging materials:

Refined quartz powder (SiO2 ≥ 99.3%, Fe2O3 ≤ 0.03%, with uniform particle size distribution and quasi-spherical morphology) serves as a filler for epoxy resin insulation encapsulation materials in electrical products. It not only significantly increases the filling capacity but also plays a crucial role in reducing the viscosity of the mixed system, improving processing performance, enhancing the permeability of the mixture to high-voltage electrical coils, decreasing the expansion coefficient and shrinkage rate of the cured material, minimizing the thermal expansion difference between the mixture and the coil, and improving the thermal, electrical, and mechanical properties of the cured product.

4-Applications in Plastic Products

Refined quartz powder serves as an ideal reinforcing agent for polypropylene (PP), polyvinyl chloride (PVC), and polyethylene (PE) products, offering both high fill capacity and excellent tensile strength. When formulated into masterbatches for PVC floor tiles, it significantly enhances wear resistance. When applied to olefin resin films (10-12% content), the silicon micro-powder ensures uniform dispersion, superior film-forming properties, and robust mechanical performance. Compared to films using PCC as filler, this formulation reduces infrared transmission by over 10%, making it highly advantageous for agricultural greenhouse film applications. Additionally, it can be utilized in wire and cable sheathing applications.

5-Application in Leather Products

In leather-like product manufacturing, refined quartz powder serves as a filler, yielding products with superior technical properties including strength, elongation, and flexibility compared to inorganic fillers such as light calcium carbonate, active calcium carbonate, and active pyrophyllite. When silicon micropowder replaces refined clay (PEM) and light calcium carbonate (PCC) in battery casing production, it achieves a filler content of approximately 65% while maintaining excellent processability. The resulting battery casings exhibit smooth surfaces, high hardness, acid resistance, voltage tolerance, thermal deformation resistance, and impact resistance, all meeting or exceeding the technical specifications outlined in JB3076-82.

VI. Applications of refined quartz powder:

Silica is a non-toxic, odorless, and pollution-free inorganic non-metallic material. It boasts excellent properties including high temperature resistance, acid and alkali corrosion resistance, moderate thermal conductivity, high insulation, low thermal expansion, stable chemical properties, and high hardness. These characteristics make it widely used in various fields such as chemical engineering, electronics, integrated circuits (ICs), electrical appliances, plastics, coatings, high-grade paints, metallurgy, refractory materials, rubber, grinding tools and abrasives, polishing and grinding, and national defense.

Quartz powder is also used as a filler in synthetic resins, a thickener in inks, a sedimentation inhibitor in paint pigments, a matting agent, a soft polishing agent for vehicles and metals, and a sedimentation inhibitor in emulsifiers. With the rapid development of high-tech fields, quartz powder is also entering a new historical period of development.