Al2O3 ceramic balls are spherical objects made of ceramic material with aluminum oxide (Al2O3) as the main component.

Characteristics of Al2O3 Ceramic Balls:

High Hardness: Has extremely high hardness, which provides better wear resistance compared to traditional steel balls and can be used for a long time without easily deforming or wearing out.

Good Chemical Stability: Has strong resistance to acid, alkali, and salts, and is not easily corroded, making it suitable for various complex chemical environments.

High Temperature Resistance: Has stability at high temperatures and can work in high-temperature environments for a long time without deforming.

The role of Al2O3 ceramic balls:

Catalyst carrier: Due to its high-temperature stability and corrosion resistance, it can be used as a carrier for catalysts, which can be used at high temperatures and in harsh chemical environments to effectively improve the efficiency and service life of catalysts.

Air filtration: It can be used to make high-efficiency air filters, which can effectively filter small particles and dust in the air to improve air quality. It has applications in air purification, ventilation systems, etc.

The production process of Al2O3 ceramic balls typically involves the following steps: raw material selection, grinding, powder preparation, shaping, drying, and sintering. Different production processes and parameters can affect the performance of the ceramic balls, so they need to be optimized and adjusted according to specific application requirements.

Factors Affecting the Quality of Al2O3 Ceramic Balls

Alumina content: Alumina is the main component of ceramic balls, and its content directly affects the performance. Generally speaking, the higher the alumina content, the better the hardness, high-temperature resistance, wear resistance, etc. of the ceramic ball, but excessively high alumina content may cause the sintering temperature to rise, increase the cost, and possibly reduce the mechanical strength of the ceramic ball.

Purity of raw materials: High-purity raw materials can reduce the presence of impurities. Impurities may react with alumina during sintering or remain in the matrix to form micro-crack defects, reducing the density, strength, and wear resistance of the ceramic ball.

Particle size: The size and distribution of the raw material powder have a significant impact on the performance of ceramic balls. Finer particles promote sintering, resulting in a higher density and stronger ceramic ball, and can disperse the stress concentration caused by the different line expansion coefficient at the grain boundary, reducing the risk of cracking and improving the fracture toughness and wear resistance; an uneven particle size distribution may result in uneven sintering, affecting performance.

Forming method: Different forming methods have different effects on the performance of ceramic balls. For example, dry pressing results in a denser product, but may be limited in terms of the complexity of shape; isostatic pressing can make the body of the product receive equal pressure in all directions, resulting in a higher density and uniform structure; injection molding is suitable for products with complex shapes, but may have a lower density compared to other methods.

Sintering temperature: Sintering temperature is one of the key factors affecting the performance of alumina ceramic balls. If the temperature is too low, sintering is not fully completed, resulting in a low density ceramic ball with low strength, hardness, and wear resistance; if the temperature is too high, it may promote the growth of alumina crystals, increase the liquid phase, and cause a decrease in strength and weakening of wear resistance.

Technical Parameters of Inert Alumina Ceramic Balls