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Cambodia Heavy calcium carbonate
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Ground calcium carbonate is an important inorganic filler and functional additive, with the chemical formula CaCO₃. It is mainly sourced from natural minerals such as limestone and marble, obtained through physical crushing and classification processes. It has a high density and low specific surface area, a wide particle size distribution, high purity, a bright white color, and good chemical and thermal stability.
Application Overview:
• Industrial Filler: Ground calcium carbonate is widely used in industries such as plastics, rubber, coatings, and papermaking as a filler, which can increase the volume of products, reduce costs, and improve certain physical properties, such as enhancing the dimensional stability of plastics, increasing the tensile strength and wear resistance of rubber products, and improving the opacity and durability of coatings.
• Building Materials: In fields such as artificial tiles, concrete, and mortar, ground calcium carbonate serves as a raw material or filler, improving the hardness, strength, and durability of products.
• Chemicals and Pharmaceuticals: In the chemical industry, ground calcium carbonate can be used as a raw material for chemical reactions; in the pharmaceutical field, it can serve as a calcium supplement for the prevention and treatment of diseases such as osteoporosis and rickets.
• Brake Pads: In the manufacturing of automotive brake pads, the role of ground calcium carbonate includes the following aspects:
• Cost Reduction: As a cheap and stable filler, it can reduce the amount of more expensive raw materials in the brake pad formulation.
• Enhanced Friction Performance: By adjusting the particle size distribution and addition ratio, ground calcium carbonate can have a certain impact on the friction coefficient of brake pads, helping to regulate braking effectiveness.
• Improved Mechanical Properties: Adding an appropriate amount of ground calcium carbonate can increase the mechanical strength and wear resistance of brake pads, allowing them to maintain structural integrity under the high temperatures generated by high-speed friction, thus extending their service life.
• Thermal Stability and Noise Control: During braking, ground calcium carbonate helps absorb some heat and slow down temperature rise, while potentially reducing braking noise by altering the microstructure.
In the production of brake pads, ground calcium carbonate is not a key factor determining the core friction performance of the pads, but rather serves as an auxiliary filler used in conjunction with other high-performance friction materials (such as asbestos, metal fibers, ceramic particles, etc.). In practical applications, suitable specifications and addition ratios of ground calcium carbonate are selected based on the specific performance requirements of the brake pads to ensure compliance with safety standards and performance indicators.
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