Overview of Silicon Nitride

Silicon Nitride (Si₃N₄) is a critical ceramic material renowned for its exceptional mechanical properties, high-temperature resistance, and chemical stability. It is widely used in the fabrication of high-temperature structural components, bearings, cutting tools, and electronic devices. Silicon Nitride can be prepared through methods such as reaction sintering or hot pressing, resulting in two crystalline forms: α-Si₃N₄ and β-Si₃N₄, depending on the production process.

Features of Silicon Nitride

High Hardness and Wear Resistance: Silicon Nitride boasts remarkable hardness and wear resistance, making it ideal for high-performance cutting tools.

Thermal Stability: It maintains excellent mechanical properties at extremely high temperatures, with a maximum usage temperature exceeding 1200°C.

Good Chemical Stability: It shows great resistance to corrosion by most molten metals and acid-base solutions.

Low Density: Compared to metal materials, Silicon Nitride has a lower density, beneficial for reducing the weight of structural components.

Excellent Electrical Insulation Properties: It is a preferred choice for electronic packaging materials.

(Cheap Hydrophilic And Hydrophobic Fumed Silica Dioxide 90%-99% SiO2 Content Fine White Fumed Precipitated Silica powder)

Specification of Cheap Hydrophilic And Hydrophobic Fumed Silica Dioxide 90%-99% SiO2 Content Fine White Fumed Precipitated Silica powder

Product Content: Cheap Hydrophilic and Hydrophobic Fumed Silica Dioxide 90%–99% SiO2 Content Fine White Fumed Precipitated Silica Powder

This high-purity silica powder is a versatile material available in both hydrophilic and hydrophobic forms, engineered for applications requiring enhanced performance in industrial, chemical, and manufacturing processes. With a SiO2 content ranging from 90% to 99%, it is produced via advanced fumed or precipitation methods, ensuring consistent quality and cost-effectiveness.

**Key Specifications:**
– **SiO2 Content:** 90%–99% (adjustable based on grade and application requirements).
– **Appearance:** Fine white powder with uniform particle distribution.
– **Particle Size:** Fumed silica typically ranges between 7–40 nm (primary particles), while precipitated silica particles are slightly larger, averaging 5–40 microns.
– **Surface Area:** Fumed silica offers high surface area (50–400 m²/g); precipitated variants have lower surface area (30–200 m²/g).
– **Hydrophilic Properties:** Untreated, hydroxyl-rich surface for applications requiring moisture absorption, thickening, or anti-caking. Compatible with polar systems.
– **Hydrophobic Properties:** Surface-modified with silanes or siloxanes to repel water, ideal for waterproofing, enhancing dispersibility in non-polar media, or improving mechanical properties in composites.
– **pH Value:** Hydrophilic grades: 3.6–4.3 (aqueous suspension); hydrophobic grades: neutral to slightly alkaline.
– **Loss on Ignition (LOI):** ≤1.5% (hydrophilic), ≤5% (hydrophobic, varies with surface treatment).
– **Moisture Content:** ≤1.5% (hydrophilic), ≤0.5% (hydrophobic).
– **Bulk Density:** 30–60 g/L (fumed), 80–200 g/L (precipitated).

**Applications:**
– **Hydrophilic:** Used as a thickener in adhesives, coatings, and paints; free-flow agent in food powders; reinforcing filler in rubber and silicone products; carrier for pharmaceuticals.
– **Hydrophobic:** Enhances water resistance in sealants, coatings, and composites; improves rheology in lubricants and resins; prevents clumping in plastics and inks.

**Advantages:**
– High chemical purity and thermal stability (up to 1,200°C).
– Adjustable surface treatments for tailored performance.
– Improves mechanical strength, viscosity, and UV resistance in end products.
– Cost-efficient compared to premium silica grades, without compromising functionality.

**Packaging:** Available in 1 kg, 5 kg, 25 kg bags, or customized bulk packaging. Suitable for global shipping and compliant with ISO, REACH, and industrial safety standards. Ideal for manufacturers seeking reliable, budget-friendly silica solutions for diverse technical applications.

(Cheap Hydrophilic And Hydrophobic Fumed Silica Dioxide 90%-99% SiO2 Content Fine White Fumed Precipitated Silica powder)

Applications of Cheap Hydrophilic And Hydrophobic Fumed Silica Dioxide 90%-99% SiO2 Content Fine White Fumed Precipitated Silica powder

Cheap hydrophilic and hydrophobic fumed silica dioxide (90%-99% SiO2 content) is a versatile, fine white powder with a wide range of industrial and commercial applications due to its unique physical and chemical properties. Hydrophilic fumed silica is characterized by its high surface area and strong water-absorbing capacity, while hydrophobic fumed silica is treated to repel water, making it ideal for moisture-sensitive environments. Both forms are cost-effective solutions for enhancing product performance across industries.

In **coatings and paints**, hydrophobic fumed silica acts as a rheology modifier, preventing sagging and improving water resistance. Hydrophilic variants are used as thickeners and anti-settling agents, ensuring uniform pigment dispersion. For **adhesives and sealants**, these silicas improve viscosity control, enhance bonding strength, and provide thixotropic behavior, preventing dripping during application.

The **pharmaceutical and cosmetics industries** utilize hydrophilic fumed silica as a flow aid in tablet manufacturing or to adjust the texture of creams and lotions. Hydrophobic silica is added to powders and foundations to improve water resistance and reduce greasiness. In **construction materials**, such as concrete and cement, hydrophilic silica enhances mechanical strength and reduces cracking, while hydrophobic variants protect structures from water damage.

**Rubber and plastics** benefit from fumed silica as a reinforcing filler, improving tensile strength, abrasion resistance, and durability. It is critical in automotive tire production for low rolling resistance and grip. In **electronics**, hydrophobic silica is used in encapsulants and sealants to protect components from humidity, while hydrophilic grades serve as dielectric fillers in circuit boards.

For **agricultural applications**, hydrophobic silica improves pesticide adhesion to plant surfaces and reduces granule clumping. In **environmental cleanup**, it aids in oil spill absorption due to its high surface area and oleophilic properties. The **food industry** employs food-grade hydrophilic silica as an anti-caking agent in powdered products.

Additionally, fumed silica is used in **3D printing resins** to control viscosity and reduce shrinkage. Its low cost, high purity, and adaptability make it indispensable for R&D and large-scale manufacturing. With customizable particle sizes and surface treatments, cheap hydrophilic and hydrophobic fumed silica dioxide offers a reliable, efficient solution for optimizing product performance while maintaining budget efficiency.

Company Introduction

Welcome to JatujakGuide,a leading global supplier of high-quality silicon nitride (Si₃N₄) products. We specialize in providing advanced ceramic materials that offer exceptional strength, thermal stability, and wear resistance, making them ideal for industries such as aerospace, automotive, and electronics. Our state-of-the-art manufacturing processes ensure superior product quality and consistency. With a commitment to innovation and customer satisfaction, we deliver reliable and cost-effective solutions worldwide. Whether you need silicon nitride for cutting tools, bearings, or thermal management applications, trust [Your Company Name] to meet your needs. Partner with us for high-performance materials and expert support.

If you have any questions, please feel free to contact us(nanotrun@yahoo.com).

Payment Methods

T/T, Western Union, Paypal, Credit Card etc.

Shipment Methods

By air, by sea, by express, as customers request.

5 FAQs of Cheap Hydrophilic And Hydrophobic Fumed Silica Dioxide 90%-99% SiO2 Content Fine White Fumed Precipitated Silica powder

What is hydrophilic and hydrophobic fumed silica dioxide? Hydrophilic and hydrophobic fumed silica dioxide are high-purity silicon dioxide powders with surface treatments that determine their interaction with water. Hydrophilic silica has untreated surfaces, making it water-attracting, while hydrophobic silica is chemically modified to repel water. Both types have a fine, white powder form with 90%–99% SiO2 content, offering versatility in industrial applications like adhesives, coatings, and personal care products.

What are the key differences between hydrophilic and hydrophobic fumed silica? The primary difference lies in their moisture interaction. Hydrophilic silica absorbs water, enhancing viscosity and stability in water-based systems like paints or gels. Hydrophobic silica resists moisture, ideal for waterproofing applications, improving flowability in powders, or reinforcing silicone rubber. The choice depends on whether water compatibility or resistance is required in the end product.

Why does SiO2 content range from 90% to 99%? The SiO2 percentage reflects purity and processing methods. Higher purity (99%) ensures minimal impurities, critical for sensitive applications like pharmaceuticals or food-grade products. Lower grades (90%–95%) are cost-effective for industrial uses like construction materials, where ultra-high purity isn’t essential. The range allows flexibility in balancing performance needs with budget constraints.

Is this silica powder safe to handle? Yes, but precautions are necessary. Inhalation of fine particles can irritate the respiratory system, so use masks and ensure ventilation. Skin contact is generally safe, but gloves are recommended to prevent dryness. Store in a cool, dry place away from moisture. Always follow safety data sheets (SDS) and local regulations for safe usage and disposal.

Which industries use hydrophilic/hydrophobic fumed silica? These powders are widely used in coatings, adhesives, and sealants for thickening and anti-settling properties. The automotive and construction sectors use hydrophobic silica for water-resistant materials. Pharmaceuticals employ high-purity grades as flow agents in tablets. Cosmetics utilize them for texture enhancement, and food industries apply them as anti-caking agents. Their versatility makes them essential across technical and industrial fields.

(Cheap Hydrophilic And Hydrophobic Fumed Silica Dioxide 90%-99% SiO2 Content Fine White Fumed Precipitated Silica powder)