Will lighting tempered glass change color or produce thermal stress cracks in high temperature environments?
Publish Time: 2025-04-02
The performance of lighting tempered glass in high temperature environments has always been the focus of the lighting industry. As a material widely used in indoor and outdoor lighting equipment, lighting tempered glass is known for its high strength, good light transmittance and heat resistance. However, when facing extreme high temperature environments, whether it will change color or produce thermal stress cracks has become a key factor affecting the quality and service life of lighting products.The performance of lighting tempered glass in high temperature environments depends first on the tempering treatment during its production process. Tempering is a process that forms a prestressed layer on the surface of glass by physical or chemical methods to improve its impact strength and heat resistance. Tempered glass can maintain high stability and durability even when facing high temperatures. This is because the prestressed layer formed during the tempering process can effectively offset the thermal stress caused by high temperature and reduce the risk of glass breakage.However, although tempering improves the heat resistance of glass, lighting tempered glass may still change color under extreme high temperature conditions. This is mainly due to the chemical reaction of certain components in the glass at high temperatures, resulting in color changes. Especially for glass containing metal oxides, high temperature may cause the oxide to reduce, resulting in color changes. In addition, long-term high temperature exposure may also damage the protective film on the surface of the glass, accelerate the aging process, and further affect the light transmittance and aesthetics of the glass.As for thermal stress cracking, this is another challenge that glass may face in a high temperature environment. When the glass is heated unevenly, different parts expand to different degrees, which will cause stress inside the glass. If this stress exceeds the tolerance limit of the glass, it will cause cracks. For lighting tempered glass, since a prestressed layer has been formed inside it, it can resist the influence of thermal stress to a certain extent. However, if the high temperature environment is continuous and severe, or if there are defects in the glass during the manufacturing process (such as bubbles, inclusions, etc.), the risk of thermal stress cracking may increase.In order to reduce the risk of discoloration and thermal stress cracking of lighting tempered glass in a high temperature environment, a series of measures can be taken. First, the quality of raw materials and process parameters should be strictly controlled during the glass production process to ensure that the glass composition is uniform and the structure is dense. Secondly, the prestress level of the glass can be increased by optimizing the tempering process parameters, thereby enhancing its ability to resist thermal stress. In addition, a protective film can be applied on the glass surface to slow down the erosion of the glass surface by high temperature.In summary, although lighting tempered glass has a certain risk of discoloration and thermal stress cracking in high temperature environments, these risks can be effectively reduced by optimizing the production process, improving the quality of glass and taking necessary protective measures. This will help ensure the quality and service life of lighting products and meet consumers' demand for high-quality lighting equipment.
