In which country was glass invented? When did China begin to use glass extensively?
The earliest glass makers in the world were ancient Egyptians. The appearance and use of glass has a history of more than 4,000 years in human life. Small glass beads have been unearthed in the remains of Mesopotamia and ancient Egypt 4,000 years ago.
During the Yongzheng period, Guangzhou’s foreign trade flourished. Every summer and autumn, 20 large Western trade ships arrive at the port, from Britain, France, the Netherlands, Austria and Sweden. These big ships came to buy Chinese tea, porcelain, and silk. Although most of the ships brought on board were silver, usually three to five tons of Spanish silver coins, there were also some Western products, such as woolen cloth, clocks, etc., among which there was the same A more special product is glass.
Glass is an amorphous inorganic non-metallic material. It is generally made from a variety of inorganic minerals (such as quartz sand, borax, boric acid, barite, barium carbonate, limestone, feldspar, soda ash, etc.) as the main raw material, and a small amount of auxiliary raw materials are added of. Its main components are silicon dioxide and other oxides.
The chemical composition of ordinary glass is Na2SiO3, CaSiO3, SiO2 or Na2O·CaO·6SiO2, etc. The main component is silicate double salt, which is an amorphous solid with irregular structure. It is widely used in buildings to separate wind and transmit light. It is a mixture. There are also colored glass that is mixed with certain metal oxides or salts to show color, and tempered glass made by physical or chemical methods. Sometimes some transparent plastics (such as polymethyl methacrylate) are also called plexiglass.
Post time: May-10-2021