AZS channel bricks comprise alumina (Al₂O₃), zirconia (ZrO₂) and silica (SiO₂) as primary constituents, forming a dense, uniform crystalline structure through the electric melting process. Their core advantages include:
High resistance to glass melt erosion: The incorporation of zirconium oxide significantly enhances chemical erosion resistance against diverse glass melts such as soda-lime and borosilicate glass, prolonging the service life of the feed channel。
Minimal contamination tendency: Extremely low glass phase exudation prevents defects like slag inclusions and bubbles, ensuring the transparency and purity of glass products。
Superior thermal stability: A low thermal expansion coefficient coupled with high thermal conductivity ensures structural integrity under temperature fluctuations, preventing cracking。
Precise dimensional control: High dimensional accuracy and tight joint sealing minimise the risk of molten glass leakage。
Typical Physical Properties (AZS-33 grade):
ZrO₂ content: 33% ± 1%
Bulk density: ≥3.75 g/cm³
Apparent porosity: ≤1.2%
Room-temperature compressive strength: ≥160 MPa
Maximum service temperature: ≥1700°C
