Glass (i.e. silicon dioxide) is amorphous, glass is not crystalline and has no fixed melting point. It only has a melting range of 600-800 ℃, and begins to soften. The higher the temperature, the better the fluidity.
So glass does not have a fixed melting point, but it has a softening point, with a softening point of 500 degrees for lead glass and 1600 degrees for quartz glass. When the glass reaches 600 degrees Celsius, it can be softened by a furnace fire, pulled with glass wire. The gas burner is 1300 degrees Celsius, and the alcohol burner is 1000 degrees Celsius
Glass does not have a certain melting and solidification point, but ordinary alcohol lamps are sufficient to soften it. Ordinary glass is mainly made of soda ash, limestone, quartz, and feldspar as raw materials, mixed, melted, clarified, and homogenized in a glass kiln, and then processed into glass products after annealing. The main composition of ordinary glass is approximately CaO: Na2O: 6SiO2, which is a substance fused together with sodium phosphate, calcium silicate, and silicon dioxide.
Glass can be made into any shape of product when softened. In addition to ordinary glass, there are also special glass mainly composed of borate, phosphate, and fluoride. When making glass, the raw material melts slightly above 1200 ℃ and is cooled in a mold to form glass.