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Preface
The main components of inert ceramic balls are aluminium oxide, silicon dioxide, etc. The content of aluminium oxide directly affects their chemical and physical properties, while ferric oxide is an impurity component, the less the better.
Main Components
Silicon dioxide (SiO₂): It is one of the main components of inert ceramic balls, with a content usually above 60%. Silicon dioxide has excellent chemical stability and high-temperature resistance, ensuring that inert ceramic balls maintain a stable structure and performance in high-temperature and corrosive environments.
Aluminum oxide (Al₂O₃): The content is generally between 20% and 35%. It enhances the mechanical strength and high-temperature resistance of inert ceramic balls, making them less prone to breakage and deformation during use.
Other Oxides:
Calcium oxide (CaO): The content is relatively low, typically between 1% and 5%. Its role is to regulate the sintering temperature and chemical stability of the ceramic balls.
Magnesium oxide (MgO): The content is usually between 0.5% and 3%, which can improve the thermal stability and thermal shock resistance of the ceramic balls.
Iron oxide (Fe₂O₃): The content is generally no more than 1%. Excessive amounts can affect the color and chemical stability of the ceramic balls.
Low alumina inert ceramic balls composition
| Al2O3 | SiO2 | MgO | K2O+Na2O | CaO | TiO2 | Leachable Fe2O3 |
| 23-26% | 62-72% | <1.0% | <4% | <1.5 % | <1.0% | <0.1% |
High-purity alumina inert ceramic balls composition
| Al2O3 | SiO2 | Fe2O3 | CaO+MgO | TiO2 | K2O+Na2O |
| ≥99% | ≤0.25% | ≤0.1% | ≤0.2% | ≤0.1% | ≤0.4% |
Composition characteristics and functions
Chemical inertness: The main component of inert ceramic balls gives them strong chemical inertness, which can resist the erosion of chemical substances such as acids and bases, and is suitable for the treatment of various corrosive media.
High temperature resistance: Components such as silicon dioxide and aluminum oxide endow inert ceramic balls with high refractoriness, allowing them to be used for a long time in high temperature environments without melting or deteriorating.
High mechanical strength: Reasonable composition combination enables inert ceramic balls to have high compressive strength and wear resistance, and can withstand the erosion and pressure of the medium.
application area
Inert ceramic balls are widely used in reactors and towers in industries such as chemical, petroleum, metallurgy, and environmental protection. They serve as catalyst support layers or fillers, playing a role in evenly distributing fluids and protecting catalysts. The composition and performance requirements of inert ceramic balls may vary in different application scenarios, so manufacturers will adjust the formula according to specific needs.
