Green Silicon carbide 0.5microns works in foamed ceramics industry
I. Basic Physical Properties of green silicon carbide 0.5microns
1. Particle Size: D50 is 0.5μm, D100≤0.9μm, ultrafine particles are uniformly dispersed;
2. High Temperature Resistance: Melting point 2700℃, chemically stable in foaming and sintering environments at 1100-1200℃;
3. Mohs Hardness 9.5, high thermal conductivity, low coefficient of thermal expansion 7-9×10-6/℃, resistant to thermal shock;
4. Resistant to acid and alkali corrosion, high powder activity, easily undergoes oxidation and gas generation reaction at high temperatures.
II. Five Core Roles of Green Silicon Carbide 0.5microns in Foamed Ceramics
1. Ultrafine Foaming Pore-Forming Agent
0.5microns are extremely fine, and the powder is uniformly dispersed within the ceramic blank, producing micron-sized closed micropores. These pores are small in size, narrow in diameter, and rounded, avoiding defects such as large pores, interconnected coarse pores, and collapsed pores.
2. Matrix Reinforcement, Toughening, and Anti-Powdering
Ultrafine SiC microparticles fill the grain boundaries of the ceramic matrix, providing grain boundary reinforcement:
• Improve the compressive and flexural strength of foamed ceramics, solving common problems of loose texture, powdering, edge chipping, and flaking during polishing in ordinary foamed ceramics;
• Improve the wear resistance and erosion resistance of finished products, significantly increasing the service life of filter and adsorption-type foamed ceramics.
3. Optimized Thermal Conductivity, Insulation, and Thermal Shock Resistance
1. Controllable microporous structure reduces the thermal conductivity at room temperature, upgrading thermal insulation performance.
2. SiC’s low thermal expansion property reduces the overall coefficient of thermal expansion of the green body, making the sheets less prone to cracking and warping during high-temperature sintering and thermal cycling, suitable for high-temperature kiln insulation foamed ceramic components.
4. Imparting Antistatic, Thermal Conductivity, and Electromagnetic Shielding Functions
Green silicon carbide possesses inherent semiconductor conductivity, and 0.5microns ultrafine powder has excellent dispersibility, enabling the preparation of antistatic foamed ceramics, thermally conductive porous ceramics, and electromagnetic adsorption carriers for waste gas treatment.
5. Enhanced Chemical Inertness and Acid/Alkali Resistance
Green silicon carbide 0.5microns has extremely low impurity content, with low iron and free carbon content; the finished foamed ceramics are resistant to strong acids and alkalis and oil corrosion, suitable for oil-water separation, wastewater filtration, and chemical adsorption porous ceramic substrates.
III. Practical Case Studies in the Specific Foamed Ceramic Industry
1. High-End Closed-Cell Foamed Ceramic Insulation Boards (Exterior Wall Insulation, Partition Walls, Fireproof Insulation)
Green silicon carbide 0.5microns generates fine closed pores, resulting in lower thermal conductivity, extremely low water absorption, and high closed-cell rate. This solves the problems of high water absorption and insulation degradation in ordinary foamed ceramics, and is used in Class A fireproof exterior wall insulation boards.
2. Industrial Filtration Porous Foamed Ceramic
Oil-water separation foamed ceramic filter blocks, microporous carriers for oily wastewater treatment; ultra-fine pores increase specific surface area, providing strong oil adsorption and retention capacity;
High-temperature flue gas dust removal, kiln exhaust gas filtration carriers, resistant to high temperatures and thermal shock, and does not crack or collapse even after repeated high-temperature cooling.
3. Functional Specialty Foamed Ceramics
1. Antistatic foamed ceramic pads, porous antistatic substrates for lithium battery workshops;
2. Heat-dissipating porous ceramics, breathable heat dissipation substrates for high-power devices;
3. Exhaust gas catalyst carriers, catalyst-loaded foamed ceramic matrices, with ultra-fine pore structure increasing the catalyst adhesion area.
4. Glazed Foamed Ceramic Decorative Panels
Ultra-fine foaming agent ensures uniform cell size in the green body, resulting in high surface flatness of the panels. This reduces the likelihood of pinholes and unevenness in the glaze layer, improving the yield of finished glazed foamed ceramic products.
IV. Extended Applications
In addition to being used as a foaming agent, green silicon carbide 0.5microns can also be used as a polishing powder for foamed ceramics and as a filler for wear-resistant modified coatings on the surface of foamed ceramics.