Silicon carbide powder coating machine, powder dryer, powder disperser-Wanrong equipment

Release time:

2024-10-10 09:37

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As a non-metallic material, silicon carbide has excellent properties such as high hardness, high strength, oxidation resistance, high temperature resistance, wear resistance and corrosion resistance, and is widely used in refractory materials, engineering ceramics, structural materials and other fields. However, because nano-sized silicon carbide powder is prone to agglomeration during ultrafine grinding, it is necessary to modify it to improve its dispersion, fluidity and other properties..

The modification of silicon carbide is mainly to optimize its surface or performance to improve its performance and effect in different application fields. The modification methods of silicon carbide mainly include physical modification and chemical modification.：

Physical modification refers to the physical and chemical properties of the surface of silicon carbide by physical methods to enhance its application performance. Common physical modification methods include：

1. Surface adsorption modification：The use of physical or chemical adsorption principle to make the coating material(such as some organic or inorganic) evenly adsorbed on the surface of silicon carbide particles to form a continuous and complete coating. This method is simple to operate, but the effect is limited.

2. Inorganic coating modification：with inorganic oxides or hydroxidesCladdingOn the surface of the silicon carbide particles, it is bonded to the surface of the particles by physical methods or van der Waals forces. This modification method can enhance the wear resistance, corrosion resistance, etc. of the silicon carbide particles to improve their application performance.

Chemical modification is the use of functional groups in organic molecules and silicon carbide particle surface chemical adsorption or chemical bonding reaction, the particle surface is coated or modified. Chemical modification methods can be divided into surface pickling purification, surface coating modification and coupling modification..

1. Surface coating modification：by inorganic compounds or organic compounds(e. g., surfactants, hyperdispersants, fatty acid soaps, etc.) to coat the surface of the silicon carbide particles to change their surface properties. The coating can generate steric repulsion to prevent agglomeration of the particles, thereby improving their dispersibility and stability.

2. Coupling modification：The modifying agent is bonded to the surface of the silicon carbide particles by a chemical coupling reaction to form a strong bonding force such as a covalent bond or an ionic bond. This modification method can enhance the compatibility of silicon carbide particles with organic materials and improve its application performance in composite materials.

In industrial mass production, the use of both methods requires the use of auxiliary modification machines."Honeycomb mill" for processing, Wanrong powder equipmentHoneycomb mill is a special equipment for the modification and production of functional materials. It can simultaneously realize grinding, drying, sorting, and surface chemical treatment with powder, and at the same time dry and depolymerize wet grinding filter cake and slurry. After the modifier is applied, the powder particles are usually heated or cured to ensure the adhesion and stability of the coating. Finally, the modification andCladdingAfter the powder particles are tested and evaluated to verify their enhanced performance and performance.

Modification effect and application throughhoneycomb mill modificationThe performance of silicon carbide can be significantly improved. For example, the dispersion and stability of the modified silicon carbide powder in the liquid phase are improved, and the slurry with high solid content and low viscosity can be prepared.：At the same time, the modification can also improve the formability of silicon carbide ceramics and the final performance of the product. In aerospace, electronics, chemical and other fields, modified silicon carbide has a wider application prospect.

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