Why Is Alumina Widely Used in The Ceramic Industry?

Alumina is widely used in the ceramic industry because it can greatly improve the properties of ceramics. In the field of traditional ceramics, such as in the production of tableware and building ceramics, adding alumina to the ceramic body can effectively increase the hardness, strength and wear resistance of ceramics, making them more durable, and also making the surface smoother and enhancing their ability to withstand temperature changes so that they are less likely to break. Adding alumina to ceramic glazes can improve the performance of the glazes, enabling ceramic products to have better glossiness, wear resistance and chemical stability, thus prolonging their service life and enhancing their decorative properties. In the aspect of special ceramics, alumina is an even more crucial raw material. For electronic ceramics, it has high insulation, a high dielectric constant and good high-frequency characteristics, and can be used to make substrates, packaging materials and other components for electronic elements. For example, in the manufacturing of integrated circuits, alumina ceramic substrates can provide good electrical insulation and heat dissipation performance for chips. In the field of bioceramics, due to its good biocompatibility and chemical stability, alumina ceramics can be used to make artificial joints, dental restoration materials and so on. It has a small reaction with human tissues and can remain stable in the human body for a long time. In high-temperature ceramics, alumina-based ceramic fibers can be used as high-temperature thermal insulation materials, which can withstand high temperatures ranging from 1000 to 1800 °C and play a key role in heat protection for aerospace engines and thermal insulation for industrial kilns.