Elevating Melting Temperature
Aluminum hydroxide decomposes at high temperatures, releasing oxygen and combining with other components to form the glass network. This helps raise the glass’s melting temperature, making it more heat-resistant.
Enhancing Glass Stability
The addition of aluminum hydroxide can improve the chemical stability and physical properties of the glass, making it more resistant to corrosion and dissolution. This makes the glass more durable under different environmental conditions.
Reducing Thermal Expansion Coefficient
Aluminum hydroxide can reduce the thermal expansion coefficient of glass, making the glass more stable when exposed to temperature variations. This is crucial for glass products that need to withstand temperature changes.
Improving Optical Properties
In some cases, the addition of aluminum hydroxide can enhance the glass’s optical properties, such as transparency and refractive index, making it more suitable for specific optical applications like optical lenses and optical fibers.
Aluminum hydroxide is typically a relatively inexpensive material, and its addition can lower the cost of glass manufacturing compared to other components, improving production efficiency.
In summary, the roles of aluminum hydroxide in glass manufacturing include elevating the melting temperature, improving stability, reducing the thermal expansion coefficient, enhancing optical properties, and reducing costs. This makes it a valuable addition in the production of various glass products, from architectural glass to optical devices.