1. Product Composition and Structural Quality
1.1 Alumina Content and Crystal Stage Advancement
( Alumina Lining Bricks)
Alumina lining blocks are thick, crafted refractory porcelains mostly made up of light weight aluminum oxide (Al ₂ O ₃), with content generally ranging from 50% to over 99%, straight affecting their efficiency in high-temperature applications.
The mechanical strength, deterioration resistance, and refractoriness of these bricks boost with higher alumina concentration as a result of the advancement of a durable microstructure dominated by the thermodynamically secure α-alumina (corundum) phase.
During manufacturing, precursor products such as calcined bauxite, integrated alumina, or artificial alumina hydrate undergo high-temperature shooting (1400 ° C– 1700 ° C), advertising phase change from transitional alumina forms (γ, δ) to α-Al ₂ O FIVE, which displays outstanding solidity (9 on the Mohs range) and melting factor (2054 ° C).
The resulting polycrystalline framework consists of interlacing corundum grains embedded in a siliceous or aluminosilicate glazed matrix, the structure and volume of which are thoroughly managed to stabilize thermal shock resistance and chemical durability.
Small ingredients such as silica (SiO TWO), titania (TiO ₂), or zirconia (ZrO TWO) may be introduced to change sintering habits, improve densification, or boost resistance to specific slags and fluxes.
1.2 Microstructure, Porosity, and Mechanical Integrity
The efficiency of alumina lining blocks is critically depending on their microstructure, specifically grain size circulation, pore morphology, and bonding stage attributes.
Optimum bricks display fine, evenly distributed pores (closed porosity preferred) and minimal 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 99 alumina, please feel free to contact us.
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