Recent research in the field of ceramic materials shows that silicon dioxide (SiO₂), as a core component accounting for more than 50% of the glaze content, is known as the "glass network former". Its introduction method and proportion control play a decisive role in the quality of ceramic products. Silicon dioxide in glazes is mainly introduced through quartz, with clay and feldspar serving as auxiliary sources. Quartz used for glaze preparation has strict quality standards, requiring a silicon dioxide purity of over 97% and a total content of iron oxide and titanium dioxide below 0.3%. Due to the high hardness of quartz, calcined quartz raw materials are universally adopted in actual production. It is worth noting that quartz undergoes multiple crystalline transformations. The low-temperature crystalline transformation occurs rapidly, and although it only produces a 0.82% volume change, it is highly prone to causing glaze cracking. Therefore, ceramics must control the heating and cooling rates during the firing stage of 500-600℃. The core functions of silicon dioxide are reflected in multiple aspects: by adjusting the molar ratio of SiO₂ to (R₂O+RO), the melting characteristics of the glaze can be precisely controlled. A ratio between 2.5 and 4.5 indicates a fusible glaze, while a ratio above 4.5 indicates a refractory glaze. The ratio is approximately 2:1 in low-temperature glazes and can reach 10:1 in high-temperature glazes. Meanwhile, it can significantly increase the melting temperature and viscosity of the glaze, enhance the hardness and wear resistance of the glaze layer, optimize the whiteness, transparency and chemical stability of the glaze surface, reduce the expansion coefficient of the glaze, and minimize the risk of product deformation. Industry experts stated that the reasonable introduction and scientific proportioning of silicon dioxide are crucial for balancing the decorativeness and practicality of ceramic glazes, and have important significance for promoting the quality improvement and efficiency enhancement of the ceramic industry. For more information, you can click: https://www.tiktok.com/@mia_iot