Advantages of sintered corundum compared with fused corundum

Sintered  and fused corundum, as two important members in the field of refractory materials, each play an irreplaceable role in industrial production with their unique physical and chemical properties and wide range of applications. This article will compare the advantages of these two corundum materials from multiple dimensions, hoping to provide readers with a comprehensive and in-depth understanding.

 Impurity content and purity

 First of all, from the perspective of impurity content and purity, sintered tabular corundum is known for its low and uniform impurity content. It uses high-purity industrial alumina as raw material and does not add any additives during the production process. Therefore, the content of impurities such as iron, silicon, and sodium is extremely low and evenly distributed. In contrast, iron, carbon, etc. need to be added as additives during the production process of fused corundum, resulting in relatively high impurity content and uneven distribution. This difference is particularly important in high-end refractory applications, where low impurity content means greater chemical stability and longer service life.

 Physical properties and structural characteristics

 Sintered tabular alumina also exhibits excellent physical properties. Its crystal structure is mainly α-Al₂O₃, and the crystals are coarse and well-developed, forming a unique plate-like crystal structure. This structure enables sintered tabular corundum to have excellent heating volume stability and thermal shock resistance. It contains a large number of circular closed pores inside, which effectively resists thermal shock and prevents cracks from spreading, thus improving the overall performance of the material. In contrast, although fused corundum also has high purity, its crystal structure is mostly elongated or diamond-shaped and contains more open pore structures, which to a certain extent reduces its thermal shock resistance and Resistance to peeling.

 Production technology, energy conservation and environmental protection

 From the perspective of production technology, the production process of sintered tabular corundum is more energy-saving and environmentally friendly. The sintering process uses natural gas as the heat source and does not emit other waste gases and slag except carbon dioxide, which meets the environmental protection requirements of modern industry. The production of fused corundum is relatively energy-intensive. The energy consumption per ton of product is as high as 2300-3300 kilowatt hours, and a large amount of waste gas and slag will be generated during the production process. Therefore, in today's pursuit of sustainable development, the advantages of sintered tabular corundum in the production process are particularly prominent.

 Application areas and performance

 In terms of application fields, sintered tabular corundum is widely used in various high-temperature environments due to its excellent properties. Its resistance to thermal shock and slag erosion at high temperatures makes it a leader in the field of refractory materials. Whether used as refractory bricks, castables or refractory coatings, sintered tabular alumina offers outstanding performance guarantees. Fused corundum is widely used in abrasives, precision casting and other fields because of its high hardness and good wear resistance. Especially in investment casting, fused corundum is used as the shell surface material, which can significantly improve the surface quality and mechanical properties of the casting.

 Economic benefits and social value

 From the perspective of economic and social benefits, sintered tabular alumina has brought significant economic benefits to users with its lower production cost and longer service life. At the same time, its environmentally friendly production process is also in line with the concept of green development of modern industry, which is conducive to reducing environmental pollution and reducing carbon emissions. Although the production cost of fused corundum is relatively high, it performs well in applications in certain specific fields, providing strong support for the development of related industries.

 In summary, sintered tabular corundum and fused corundum each have their own unique advantages and application areas. Sintered tabular corundum is popular for its low impurity content, excellent physical properties, energy-saving and environmentally friendly production technology, and wide range of applications; while fused corundum is popular for its high hardness, good wear resistance, and its use in precision casting, etc. Unique performance in the field. When selecting these two materials, users should make comprehensive considerations based on specific application needs and scenarios to achieve the best economic and social benefits.