NFJ Inorganic Medium to High-Temperature Secondary Binder

Inorganic Medium to High-Temperature Secondary Binders are materials used in various industrial processes to provide additional bonding strength at elevated temperatures, typically for applications such as refractory materials, coatings, or high-temperature adhesives. These binders are often used as secondary bonding agents to enhance the performance of primary binders in environments where high heat resistance is essential.

Inorganic Medium Temperature Secondary Binder Principle:

1、Stability of Friction Performance: During braking, the secondary adhesive replaces some resin that loses its bonding properties at high temperatures, ensuring the stability of friction performance. Resins (or other organic bonding materials) tend to undergo carbonization and decomposition at elevated temperatures, leading to a reduction in bonding performance and increased risk of brake slippage. NFJ inorganic high-temperature secondary adhesive exhibits increasing viscosity with temperature, compensating for the lost bonding properties of resin and enhancing the toughness of brake pads, thereby reducing the occurrence of slippage. It can replace some bonding materials.

2、Improvement of Wear Resistance: Lnorganic High Temperature Secondary Binder has fine particles, rough surface, and a porous structure, resulting in excellent bonding properties with other friction materials. With a hardness ranging from 5-7 (Mohs hardness), it enhances the wear resistance of friction materials. It can substitute for some wear-resistant materials.

3、Easy Dispersion, Mixing, and Demolding: The fine and uniform particle size of NFJ inorganic high-temperature secondary adhesive facilitates easy dispersion when mixed with other powder materials. Its bulk density is similar to fibers and other friction materials, making it easy to blend with them. This reduces friction between friction materials and processing equipment, resulting in significant demolding effects and improving the surface density of the final product.

4、Low Thermal Expansion Coefficient: NFJ inorganic high-temperature secondary adhesive exhibits no change at 550°C.

Types of Inorganic Binders:

Silicate Binders:

Composed of sodium silicate or potassium silicate, these binders are commonly used in refractory coatings, cements, and adhesives due to their ability to form strong bonds that can withstand high temperatures.

Phosphate Binders:

Phosphate-based binders, such as aluminum phosphate, are often used in high-temperature ceramic applications and coatings due to their chemical stability and resistance to thermal shock.

Alumina-Based Binders:

Alumina binders are used in refractory applications to provide additional strength and thermal resistance at very high temperatures.

Borate Binders:

Used in specific ceramic formulations and coatings, borate binders provide good thermal and chemical resistance while maintaining flexibility in certain applications.

Usage scenarios: resin materials, plastics, powder metallurgy

● Refractory Materials:

In high-temperature industries, such as steelmaking or glass manufacturing, these binders are used in refractory bricks, castables, or ceramic fibers to provide structural integrity in furnaces and kilns.

● Coatings:

Used in protective coatings for metal, ceramic, or composite substrates to resist thermal and chemical degradation in high-heat environments.

● Foundries:

In casting processes, secondary binders are used to bind sand molds and cores in metal casting to ensure the mold retains its shape under the high temperatures of molten metal.

● Ceramic Adhesives:

These binders are used in high-temperature ceramic adhesives for joining or repairing ceramic components, such as tiles or furnace linings.

● Aerospace and Automotive:

Inorganic binders are used in thermal shielding and exhaust systems in aerospace and automotive applications due to their resistance to heat and thermal expansion.

● Industrial Insulation:

Used to bind high-temperature insulation materials, such as ceramic fibers or silica-based materials, providing structural stability and thermal resistance in heat treatment or power generation applications.

● Catalyst Supports:

Inorganic binders are used to create high-temperature-resistant supports for catalysts used in chemical processing or emissions control systems, as they offer excellent thermal stability and strength.

Main Functions:

1、Exhibits good plasticity, enhancing the toughness of brake pads during braking.

2、Facilitates uniform blending of synthetic friction materials during mixing.

3、Improves the toughness and impact resistance of friction materials.

4、Enhances the sealing performance of sealing materials.

5、Provides a good surface feel upon demolding.

6、Improves the wear resistance of friction materials.