Heat treatment is a key link in the production process of oil sand craft glass. It has a significant optimization effect on its structure and performance, thereby improving the quality and application value of the product.
First, in terms of structure, heat treatment can promote stress relief inside the glass. During the preliminary processing of oil sand craft glass, internal stress may be introduced due to sanding, coating and other process operations. Through appropriate heat treatment, the glass structure is relaxed and the internal atoms are rearranged, reducing the probability of microcracks caused by stress concentration and making the glass structure more uniform and stable. For example, during the annealing process, slowly heating the glass to a certain temperature and maintaining it for a period of time, and then slowly cooling it, can effectively eliminate processing stress and enhance the structural integrity of the glass.
From the perspective of optical properties, heat treatment can improve the light transmittance and scattering properties of oil sand craft glass. After heat treatment, the crystal structure or microscopic defects inside the glass are adjusted, reducing the scattering center of light during propagation, making the light transmission more uniform and soft. For some application scenarios that have high requirements for light transmittance, such as building lighting roofs, heat-treated oil sand craft glass can not only maintain its unique hazy beauty, but also ensure sufficient and comfortable lighting effects.
In terms of mechanical properties, heat treatment significantly improves the strength of oil sand craft glass. High-temperature heat treatment promotes ion exchange or microcrystallization on the glass surface, forming a surface compressive stress layer. This compressive stress layer can effectively resist external tensile stress and improve the impact resistance and bending strength of the glass. For example, chemical tempering heat treatment immerses the glass in molten salt containing specific ions, so that the sodium ions on the glass surface exchange with the potassium ions in the molten salt. Since the potassium ion radius is larger than the sodium ion, a "crowding" is formed on the glass surface. Effect, producing compressive stress and greatly improving the mechanical properties of glass.
In addition, heat treatment also has a positive impact on the chemical stability of oil sand craft glass. It can make the chemical bonds on the glass surface more stable and enhance the resistance to chemical attack. Whether it is acid and alkali erosion in daily use environments or exposure to chemicals in some special industrial environments, heat-treated oil sand craft glass can better maintain the stability of its structure and performance.
In terms of thermal properties, heat treatment can adjust the thermal expansion coefficient of glass. Appropriate heat treatment technology can make the thermal expansion coefficient of glass more consistent with the surrounding environment or the materials connected to it, reduce thermal stress caused by temperature changes, and improve the reliability of glass in different temperature environments.
However, the heat treatment process requires precise control of parameters such as temperature, time and cooling rate. Improper parameters may result in glass deformation, color change or even performance deterioration. Therefore, in actual production, it is necessary to formulate a precise heat treatment process plan based on the specific composition, thickness and expected performance requirements of oil sand craft glass through a large number of experiments and simulation optimization to give full play to the impact of heat treatment on the structure and performance of oil sand craft glass. Optimization function to meet diversified market needs.
