How does the high temperature resistant tempering process of rice cooker cover glass maintain structural stability and transparency in sudden cold and hot environments?
Release Time : 2025-07-16
The high temperature resistant tempering process of rice cooker cover glass changes the molecular structure and stress distribution inside the rice cooker cover glass, so that it can maintain structural stability and transparency in a sudden cold and hot environment. This process is not a simple high temperature treatment, but a systematic strengthening process, which allows rice cooker cover glass to have special properties to cope with drastic temperature changes.
During the tempering process, the rice cooker cover glass will undergo a process of rapid cooling after high temperature heating. The high temperature allows the molecules inside the rice cooker cover glass to obtain enough energy to break the original stable arrangement; while the rapid cooling allows the surface of the rice cooker cover glass to shrink before the inside, forming a stress state in which the surface is compressed and the inside is tensile. This uniform stress distribution is like an invisible net that firmly binds the molecules. When encountering sudden cold and heat, the expansion or contraction of the molecules will be buffered by the stress net, reducing the risk of rupture caused by excessive temperature difference between the inside and the outside, thereby maintaining structural stability.
At the same time, the raw materials of rice cooker cover glass selected for the tempering process are of high purity, which reduces the impact of impurities on transparency. When the temperature changes drastically, the tiny impurities in the ordinary rice cooker cover glass may cause local stress concentration due to different coefficients of thermal expansion and contraction, resulting in cracks or turbidity in the rice cooker cover glass. The high-purity raw materials used in the high-temperature resistant tempering process reduce the impurity content, so that the consistency of the molecular arrangement of the rice cooker cover glass is not destroyed when it experiences temperature fluctuations, and the light can pass smoothly and maintain good transparency.
The surface treatment of the rice cooker cover glass in the process also enhances its ability to resist temperature shock. Through special chemical or physical methods, the surface of the rice cooker cover glass forms a denser structure, which has better thermal stability than the inner layer. When encountering sudden cold and heat, the surface layer can first withstand the pressure caused by temperature changes and reduce the impact on the internal structure. At the same time, this dense surface layer can also prevent moisture or impurities in the air from invading the interior of the rice cooker cover glass when the temperature changes, avoiding the decrease in transparency caused by erosion.
The tempering process can also optimize the thermal conductivity of the rice cooker cover glass, making its heat distribution more uniform when the temperature changes. When ordinary rice cooker cover glass is suddenly cooled or heated, a large temperature difference may occur in some areas due to untimely heat transfer, causing deformation or cracking. The heat conduction efficiency of the rice cooker cover glass after tempering is improved, which can quickly disperse the local heat to the whole, so that the temperature changes of various parts of the rice cooker cover glass tend to be consistent, reduce the internal stress caused by the temperature difference, and thus maintain the stability of the structure.
In addition, the special treatment of the edge of the rice cooker cover glass in the process also helps to improve its stability in temperature changes. The edge of the rice cooker cover glass is often a weak link where stress is concentrated, and it is easy to be damaged first when it is suddenly cooled or heated. The high-temperature resistant tempering process will finely polish and strengthen the edge, eliminate tiny cracks or flaws, make the stress distribution of the edge more uniform, and be able to withstand the pressure caused by temperature changes together with the main body of the rice cooker cover glass to avoid cracking from the edge.
In terms of maintaining transparency, the tempering process avoids the damage to the optical properties of the rice cooker cover glass caused by high-temperature treatment. Traditional heating may cause bubbles or crystallization inside the rice cooker cover glass, affecting light transmittance. The high-temperature resistant tempering process ensures that the rice cooker cover glass will not have such defects at high temperatures by precisely controlling the heating temperature and time. After cooling, it can still maintain a uniform molecular arrangement, allowing light to pass through almost unimpeded, thus maintaining clear transparency even when the temperature changes drastically.
The high-temperature resistant tempering process of the rice cooker cover glass optimizes stress distribution, improves raw material purity, strengthens the surface and edges, and improves thermal conductivity, so that the rice cooker cover glass can maintain both structural stability and good transparency in sudden cold and hot environments, meeting the use requirements of the rice cooker during cooking.