Types and Uses of Abrasive Materials
Refractory tabular alumina is a key component widely used in refractory materials due to its unique crystal structure and high temperature stability. Its manufacturing process and application areas demonstrate its importance in industry. This article will explore the characteristics of refractory tabular alumina and its applications in depth.
Refractory tabular alumina is known for its excellent physical properties. The material consists of pure α-Al2O3 crystals, which are sintered at high temperatures up to 2035℃ to form coarse-crystalline and structurally stable tabular alumina. Its main features include:
High Melting Point and Hardness
The melting point of refractory tabular alumina is as high as 2040℃, which makes it extremely stable in high temperature environments. At the same time, its grain hardness reaches Mohs hardness 9 and Knoop hardness 2000, showing excellent wear resistance.
Excellent Thermal Shock Stability
Due to the closed pores in the crystal structure of refractory tabular alumina and the lack of microcracks, the material has excellent thermal shock resistance. This means that it maintains good strength and stability when undergoing rapid temperature changes.
Good Chemical Resistance
Refractory tabular alumina has excellent chemical resistance to most alkaline and mineral acids. It is not affected by most chemicals except hydrofluoric acid and phosphoric acid.
High Thermal Conductivity and Resistivity
The material not only has good thermal conductivity, but also exhibits excellent electrical properties in high-frequency and high-temperature environments, making it excellent in electrical applications.
Due to its excellent properties, refractory tabular alumina has been widely used in many industries:
Applications in the Steel Industry
In steel smelting, refractory tabular alumina is used in various furnace bodies and furnace components, such as blast furnaces, hot blast furnaces, converters and continuous casting equipment. Especially in functional refractories for continuous casting, such as slide plates and breathable bricks, tabular alumina exhibits excellent thermal shock stability and wear resistance, which significantly increases the service life of the refractory materials.
Applications in the Ceramic Industry
In ceramic manufacturing, refractory tabular alumina is used to produce kiln furniture, ceramic rollers and high-temperature ceramic components. These applications can significantly improve the thermal shock stability and deformation resistance of the material. For example, refractory tabular alumina used in firing spark plugs can extend the product life and enhance its performance.
Applications in Refractory Materials
Refractory tabular alumina is also commonly used in the production of various refractory materials and castables. In refractory bricks, refractory concrete and calcium aluminate cement bonding materials, the introduction of tabular corundum can improve the thermal shock stability and strength of the material and enhance its performance in high temperature environments.
In general, refractory tabular alumina plays an indispensable role in modern industry with its excellent performance and diverse application fields. Its high temperature stability, excellent thermal shock resistance and chemical corrosion resistance make it an ideal choice for the manufacture of high-performance refractory materials and other industrial components.
