Introduction to Preparation of Composite Ceramics from Alumina Ceramics

Preparation of Composite Ceramics from Alumina Ceramics

Alumina ceramics are the most important and widely used type of ceramics in the ceramic material family. They have high strength, high temperature resistance, good insulation, wear and corrosion resistance, and good mechanical and electrical properties. Alumina ceramics are widely used in industries such as electronics, machinery, and chemical engineering. It can be used as a crucible, rotor, piston, vacuum device, circuit substrate, sodium lamp tube, chemical sensor, missile window, satellite fairing, antenna window, catalytic carrier, and bioceramics.

Adding a certain amount of titanium oxide to alumina, they are prepared into different ratios of alumina and titanium oxide composite oxide powders, and these powders are prepared into bulk multiphase ceramic materials. This multiphase material is expected to be applied in the field of wear-resistant materials.

However, its low strength, toughness, and other properties limit its application. Then, material scientists thought of introducing nanotechnology into this field, and re granulating the nano scale alumina and titanium oxide powder into the nano structured alumina and titanium oxide composite oxide powder and used it to prepare Fine structure multiphase ceramics.

Research has shown that this fine multiphase ceramic has a certain improvement in strength, toughness, and wear resistance compared to traditional micron sized multiphase ceramics.

In order to improve the mechanical properties of multiphase ceramics and reduce the firing temperature of this series of multiphase ceramics, we adopt a new process route to prepare high-performance fine alumina and titanium oxide multiphase ceramics, providing a method of modifying multiphase ceramics to improve their mechanical properties.

At present, traditional steel pipelines are commonly used for transporting coal, mineral powder, and oil in domestic and foreign steel plants, cement plants, power plants, refineries, and metal smelters. In order to extend the service life of transportation pipelines, wear-resistant castables and ceramic or hard plastic patches are commonly used both domestically and internationally, resulting in rapid development of wear-resistant engineering ceramics.

Wear resistant engineering ceramics utilize the excellent wear resistance and corrosion resistance of modern engineering ceramics. Through reasonable structural design and composite processes combined with metal component matrices, ceramics are used as the working surface, significantly improving the wear resistance and corrosion resistance service life of equipment while reducing overall costs.

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