1. Material Structure and Structural Feature
1.1 Alumina Content and Crystal Phase Evolution
( Alumina Lining Bricks)
Alumina lining bricks are thick, crafted refractory porcelains largely made up of light weight aluminum oxide (Al â‚‚ O TWO), with content generally varying from 50% to over 99%, directly influencing their performance in high-temperature applications.
The mechanical stamina, corrosion resistance, and refractoriness of these blocks increase with greater alumina concentration due to the advancement of a robust microstructure controlled by the thermodynamically stable α-alumina (corundum) stage.
Throughout manufacturing, forerunner materials such as calcined bauxite, merged alumina, or synthetic alumina hydrate undergo high-temperature shooting (1400 ° C– 1700 ° C), advertising phase improvement from transitional alumina forms (γ, δ) to α-Al â‚‚ O FIVE, which exhibits extraordinary firmness (9 on the Mohs range) and melting point (2054 ° C).
The resulting polycrystalline structure consists of interlacing diamond grains installed in a siliceous or aluminosilicate glassy matrix, the structure and volume of which are very carefully controlled to stabilize thermal shock resistance and chemical sturdiness.
Minor additives such as silica (SiO TWO), titania (TiO â‚‚), or zirconia (ZrO TWO) may be introduced to modify sintering habits, boost densification, or enhance resistance to details slags and fluxes.
1.2 Microstructure, Porosity, and Mechanical Honesty
The efficiency of alumina lining blocks is critically dependent on their microstructure, especially grain size circulation, pore morphology, and bonding stage qualities.
Optimal bricks show fine, uniformly 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 alumina rods, please feel free to contact us.
Tags: Alumina Lining Bricks, alumina, alumina oxide
All articles and pictures are from the Internet. If there are any copyright issues, please contact us in time to delete.
Inquiry us