Modified Fused Silica Powder High Purity (≥ 99%)

• Customization: Available
• Certification: ISO
• Application: Rubber, Plastic, Chemical, Construction, Metallurgy, Ceramic, Casting, Glass
• Model NO.: SF
• Transport Package: Paper Bag, Big Bag, Pallet
• Specification: SiO2>99.9%
• Trademark: ST
• Origin: Lianyungang, China
• HS Code: 32074000
• Production Capacity: 50000pieces/Year

Product Description

Product Overview

Modified fused silica powder is a spherical silicon dioxide powder produced through high-temperature melting technology, followed by surface modification. It features ultra-high purity (≥99%), controllable particle size distribution (D50 0.5μm-50μm, customizable), low thermal expansion coefficient, and excellent dispersibility. Widely used in electronic packaging, polymer composites, specialty coatings, and other fields, it significantly enhances mechanical strength and thermal stability.

Key Parameters

 

Parameter	Value/Property
Chemical Purity	SiO2≥99%, Heavy Metals <50ppm
Particle Size Distribution	D50 0.5μm-50μm (Customizable)
Specific Surface Area	1-15m²/g (Adjustable based on particle size)
Loss on Ignition	≤0.5% (1050ºC×2h)
Surface Treatment	Silane/Titanate Coupling Agent (Optional)
Mohs Hardness	6-7

Product Advantages

 

 High Purity & Precision - Purity ≥99%, extremely low impurities, meeting electronic-grade material requirements.
 Precise Particle Size - Strictly controlled by laser particle size analyzer, customizable in the range of 0.5-50μm.
 Modification Technology - Surface-active groups enhance interfacial bonding with resins/plastics.
 Stable Performance - Low thermal expansion coefficient (0.5×10^-6/ºC), excellent compatibility with plastics.
 Eco-Friendly & Safe - Compliant with RoHS/REACH, free of radioactive substances.

Typical Applications

 

• Electronic Encapsulation: Filler for epoxy/silicone encapsulants, reducing CTE.

• Composite Materials: Reinforcement for nylon/PP/PBT engineering plastics, improving heat resistance.

• Specialty Coatings: Functional filler for wear-resistant/anti-corrosion coatings, enhancing hardness.

• Adhesives: Improves rheological properties of silicone rubber, reducing sedimentation.

• Advanced Ceramics: Sintering aid for alumina/silicon nitride ceramics.

Packaging & Storage

 

• 25kg/bag (moisture-proof composite bag), customizable.

• Non-hazardous, store in a dry, ventilated environment.

• Avoid contact with strong acids/bases.

Technical Support

Provides particle size distribution charts/SEM images/MSDS and other test reports.
Supports custom surface modification solutions based on customer samples.
Professional team offers material application solutions.
 

Company Information:

Jiangsu Shengtian New Materials Co., Ltd. has a technical research and development team focusing on ultra-fine powder materials, and has strong strength in the research and development and production of ultra-fine functional materials, composite materials and related applications, and has become a more influential high-tech enterprise in the ultra-fine functional powder industry.
The company's products include crystalline silicon powder, molten silicon powder, soft composite silicon powder, spherical silicon powder, aluminum oxide powder, ceramic powder, glass powder and other ten categories, nearly 100 kinds of different specifications of products, and has a strong modification, compounding and other follow-up deep processing technology and capabilities. The products are processed by special technology, the production technology is leading and innovative, and the introduction of international technical standards for similar products, widely used in electronic packaging, copper clad plate, ink coating, adhesive, ceramics, precision casting, glass fiber, plastic rubber and other industries, giving its functionality while helping customers reduce costs. And provide the overall application of technology solutions.
The company has more than 20 different types of production lines, more than 100 sets of domestic advanced equipment, with an annual output of 50,000 tons. The company adopts professional production and testing equipment and formulates strict production quality control system to conduct all-round control of product quality. All products of the company have passed SGS environmental protection testing, in line with the EU ROHS green environmental protection standards. The company took the lead in the silicon powder industry through the ISO9001 quality management system certification and ISO14001 environmental management system certification, has passed the high-tech product identification. The company's products and solutions have been applied to more than 160 enterprises around the world, including more than 80 customers with stable cooperation for more than 10 years.

Workshop:
 

An excellent manufacturing enterprise

The company has 20 patents, the company has passed ISO9001 and ISO14001 certification, and has been recognized as a national high-tech enterprise