1. Product Composition and Structural Residence
1.1 Alumina Content and Crystal Stage Evolution
( Alumina Lining Bricks)
Alumina lining bricks are thick, engineered refractory porcelains largely made up of light weight aluminum oxide (Al â‚‚ O FOUR), with web content generally ranging from 50% to over 99%, directly influencing their performance in high-temperature applications.
The mechanical stamina, rust resistance, and refractoriness of these bricks boost with greater alumina concentration as a result of the development of a robust microstructure controlled by the thermodynamically secure α-alumina (corundum) phase.
During manufacturing, precursor products such as calcined bauxite, merged alumina, or artificial alumina hydrate go through high-temperature firing (1400 ° C– 1700 ° C), promoting stage makeover from transitional alumina forms (Îł, δ) to α-Al Two O FIVE, which exhibits extraordinary firmness (9 on the Mohs scale) and melting factor (2054 ° C).
The resulting polycrystalline framework contains interlacing diamond grains embedded in a siliceous or aluminosilicate glazed matrix, the make-up and volume of which are meticulously controlled to stabilize thermal shock resistance and chemical resilience.
Minor additives such as silica (SiO TWO), titania (TiO â‚‚), or zirconia (ZrO â‚‚) might be presented to customize sintering behavior, improve densification, or enhance resistance to particular slags and fluxes.
1.2 Microstructure, Porosity, and Mechanical Integrity
The efficiency of alumina lining blocks is critically based on their microstructure, specifically grain dimension circulation, pore morphology, and bonding stage attributes.
Optimal bricks display great, evenly dispersed pores (closed porosity liked) and very little open porosity (
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