1. Product Make-up and Structural Feature
1.1 Alumina Material and Crystal Stage Advancement
( Alumina Lining Bricks)
Alumina lining blocks are dense, crafted refractory porcelains mostly composed of aluminum oxide (Al ₂ O ₃), with web content commonly varying from 50% to over 99%, directly influencing their efficiency in high-temperature applications.
The mechanical stamina, rust resistance, and refractoriness of these blocks boost with greater alumina focus due to the advancement of a robust microstructure dominated by the thermodynamically secure α-alumina (diamond) phase.
During production, precursor materials such as calcined bauxite, fused alumina, or synthetic alumina hydrate undergo high-temperature firing (1400 ° C– 1700 ° C), promoting stage improvement from transitional alumina types (γ, δ) to α-Al Two O THREE, which shows phenomenal firmness (9 on the Mohs scale) and melting point (2054 ° C).
The resulting polycrystalline structure includes interlocking diamond grains embedded in a siliceous or aluminosilicate lustrous matrix, the make-up and volume of which are meticulously managed to balance thermal shock resistance and chemical longevity.
Minor ingredients such as silica (SiO ₂), titania (TiO ₂), or zirconia (ZrO ₂) might be presented to modify sintering habits, boost densification, or boost resistance to specific slags and changes.
1.2 Microstructure, Porosity, and Mechanical Integrity
The performance of alumina lining bricks is critically depending on their microstructure, particularly grain dimension circulation, pore morphology, and bonding phase qualities.
Optimum blocks show great, evenly distributed pores (shut porosity preferred) and very little open porosity (
Alumina Technology Co., Ltd focus on the research and development, production and sales of aluminum oxide powder, aluminum oxide products, aluminum oxide crucible, etc., serving the electronics, ceramics, chemical and other industries. Since its establishment in 2005, the company has been committed to providing customers with the best products and services. If you are looking for high quality alumina oxide ceramic, please feel free to contact us.
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