active silica powder

active silica powder

Active silicon micropowder is developed from crystalline silicon micropowder through our proprietary process. By applying specialized modifiers to the particle surface, we effectively modify the original surface composition, significantly enhancing the adhesion between resin and silicon micropowder while improving interfacial hydrophobicity. This results in increased mechanical strength, elastic modulus, thermal aging resistance, and weather resistance of the cured product. Most notably, it substantially reduces localized free discharge phenomena in high-voltage electrical equipment.

It is a non-toxic, odorless, and pollution-free hydrophobic (lipophilic) high-purity white quartz silica micro-powder, characterized by its pristine white color, pure texture, and high transparency. It exhibits excellent flowability, superior dispersibility, outstanding anti-settling properties, good temperature resistance, acid and alkali corrosion resistance, moderate thermal conductivity, high insulation, low expansion, stable chemical properties, and high hardness.

The main purpose of surface treatment of silicon powder is to improve the performance of the filling system. It has the characteristics of chemical stability, acid and alkali resistance, large specific surface area, well developed pore, high surface activity, good dispersibility, low oil absorption, strong thickening, high temperature resistance, good electrical insulation, anti-UV, and no discoloration when mixed with silica gel or heated.

II. Specifications Table of Active Micro-powder Products:

3、Common physical properties:

The data presented above are test values for standard products. These figures represent general product specifications that may fluctuate within acceptable ranges under various conditions. Customers may conduct customized testing based on these data as needed. When required, we can provide additional technical documentation and our application expertise to develop tailored solutions for individual clients.

4、Characteristics of active silica powder:

Active silicon micropowder is a surface-modifying agent customized by our company according to customer requirements, which undergoes surface modification treatment on silicon micropowder particles. Its main characteristics are:

1. Customized modifiers tailored to client specifications, featuring high encapsulation efficiency, superior modification performance, and exceptional anti-settling properties.

2. Customized modifiers tailored to customer specifications, offering enhanced fluidity and reduced product viscosity;

3. Customized modifiers tailored to client specifications, with increased filling capacity and cost reduction;

4. The particle surface features an interface compatible with organic systems, which enhances operational performance and improves the product's mechanical, electrical, and chemical properties post-application. 4. The particle surface features an interface compatible with organic systems, which enhances operational performance and improves the product's mechanical, electrical, and chemical properties post-application.

5. The particle surface exhibits hydrophobic properties with excellent moisture resistance;

6. Ensure the impact strength of recycled materials meets that of new materials, and that new materials meet the impact strength requirements for specialized engineering applications.

7. Enhance toughness and rigidity, lower freezing point temperature, and raise the thermal deformation temperature by 10–15°C;

8. Significantly reduce the cost of raw materials for products;

9. Extend the product's lifespan;

10. Particularly, it enables polyolefin plastics to achieve or even surpass the impact strength of pure polyolefin plastics at room temperature under low-temperature conditions, preventing product rupture and damage caused by transportation, handling collisions, or accidental drops at low temperatures. 10. Particularly, it enables polyolefin plastics to achieve or even surpass the impact strength of pure polyolefin plastics at room temperature under low-temperature conditions, preventing product rupture and damage caused by transportation, handling collisions, or accidental drops at low temperatures.

5、Analysis of main applications of active silicon micropowder

Active silica powder is a series of active silica products produced by using high-purity natural quartz raw ore, which is coated on the surface of silica powder particles with composite silane coupling agent through specific process, and then processed by grinding without iron pollution and high-precision classification.

Through advanced processing of quartz micropowder via coupling treatment, a cross-linked film is formed on its surface that enhances adhesion between the base resin and silica micropowder while improving surface hydrophobicity. This significantly boosts the product's compressive, tensile, and impact strength. The activated agent coating also improves miscibility with epoxy resin, effectively reducing delamination and sedimentation. Without compromising product quality or specifications, this process allows increased filler content while decreasing epoxy resin usage, ultimately lowering production costs and improving economic efficiency.

Moreover, it has good hydrophobicity, and the phase transition of crystal molecular structure at 200-500 degrees Celsius can compensate the preheating shrinkage of other fillers, such as rubber and gypsum.

Active silicon micropowder can be combined with epoxy resin and curing agents without accelerating or inhibiting the curing reaction rate of the epoxy resin-curing agent system, nor does it affect the performance during casting. It also significantly improves the interfacial cross-linking effect between epoxy resin and silicon micropowder, reduces viscosity, enhances fluidity, thereby improving the mechanical strength of the product.

The active silicon micropowder produced through coupling agent treatment significantly reduces the water absorption rate of potting compounds. This occurs because conventional silicon micropowders exhibit high polarity and hydrophilicity, resulting in substantial water absorption. Through hydrolysis and condensation reactions, the active silicon micropowder forms covalent bonds with the hydrolytic groups of the silane coupling agent, creating a silane coupling agent film on its surface. This transformation converts the surface from polar to non-polar, endowing it with hydrophobic and oleophilic properties, thereby reducing the water absorption rate of unsaturated polyester insulating varnish. The silicon micropowder's high surface activity generates interfacial forces far exceeding van der Waals forces with epoxy groups, facilitating stress transfer between the silicon micropowder and epoxy resin and enhancing load-bearing capacity.

To address the specific requirements of clients for the activation level and hydrophobic properties of active silicon micropowder, our company has developed a long-lasting active silicon micropowder product. This enhancement maintains the original product performance, particularly without increasing viscosity, while significantly improving hydrophobicity. As a result, the product effectively prevents delamination in the curing system.

VI. Applications of Activated Silicon Micro-powder:

1. Activated silica powder can be used as a substitute for silica, 660 silica, 550 silica, 330 silica, and 220 silica in rubber production.

2. Adding active silicon powder to the re-gummed roller products enhances their wear resistance, chemical corrosion resistance, and aging resistance. The products maintain stable hardness under temperature changes, exhibit better resilience, and achieve maximum strength.

3. Adding active silicon powder in the rubber hose production process can improve the high temperature resistance, oxygen resistance, ozone resistance, natural aging resistance, and increase the time of maintaining high elasticity.

4. Activated silica powder in tire products can improve wear resistance, high-temperature and cold-weather resistance, and extend the service life of tires.

5. The rubber products are filled with active silicon powder, resulting in a thinner rubber compound with excellent permeability and strong adhesion. This facilitates the application of the compound onto canvas, enhancing the bonding strength between the film and the canvas. Consequently, the mechanical properties of the products, including tensile strength and permanent deformation, are significantly improved.

6. Ultra-fine active silicon powder, when used in new adhesives, rapidly forms a network-like silica structure, inhibits colloid flow, accelerates curing speed, and significantly enhances bonding and sealing performance. It also provides resistance to moisture, heat, aging, and corrosion, while increasing strength and hardness.

7. Activated silica powder demonstrates exceptional efficacy in export-grade pharmaceutical butyl chloride rubber stoppers, as well as in electrical insulation rubber shoes and gloves.

8. The electrical insulation sealing tape, made from butyl rubber with active micro-powder, features high insulation strength, waterproofing, heat and cold resistance, chemical corrosion resistance, aging resistance, good plasticity, and excellent insulation properties. It is suitable for insulating and sealing electrical busbars and exposed electrical connections ranging from 0.4 to 10 kV.

7. Characteristics, Properties and Applications of Activated Silicon Micropowder:

1. Active silicon micro-powder is produced from high-quality natural quartz through the company's unique processing technology, resulting in a transition from ordered to disordered molecular structure. It exhibits white color, odorless, high purity, excellent flowability, and superior anti-settling properties, with the following characteristics:

1. Improve the compressive, tensile and impact strength of the product.

2. Promote the fluidity of product formation.

3. Shorten the vulcanization time of product, increase the output and save energy.

4. The product demolding yield rate is high.

5. Enhance the vibrancy of the product's surface color.

6. Most importantly, it can increase the filling capacity and reduce production costs.

2. Applications of active silicon micropowder: Used as filler in silicone rubber products, with its products widely applied in the silicone rubber industry. ● Remote control buttons ● Calculator keys ● Silicone components ● Refractory materials, electronic and electrical products.