Why should tempered glass be used for flame-retardant transparent components?

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Why is tempered glass chosen for explosion-proof transparent components? Transparent components are a very important element in explosion-proof electrical equipment, and customers always ask what material should be used for such components Can glass be used? Can plastic be used? Next, we will explain it to you. GB3836.1-2010, clause 26.5.2, specifies the test for thermal shock of transparent materials; the purpose of this test is to verify the thermal stability of glass under sudden cooling conditions. At present, tempered glass is a material that can meet this requirement while also offering a good cost-performance ratio. To explain this in simpler terms, tempered glass forms a uniform, permanent layer of compressive stress on its surface as a result of heating followed by quenching; this layer is intended to counteract the tensile stress that occurs on the surface during rapid cooling. Therefore, even when subjected to the stresses resulting from rapid cooling, qualified tempered glass still has this compressive stress layer to counteract those effects. https://pic3.zhimg.com/80/v2-03b7a4d4908cb8a09f64d5b4c175041e_720w.jpg