The earliest glass manufacturer in the world was the ancient Egyptians. The appearance and use of glass has a history of more than 4000 years in human life. Small glass beads have been unearthed from the remains of Mesopotamia and ancient Egypt 4000 years ago. ?
/kloc-in the 0/2 century, commercial glass appeared and began to become an industrial material. /kloc-in the 0/8th century, in order to meet the needs of making telescopes, optical glass was made. 1874, Belgium made flat glass for the first time.
1906, the flat glass is made in America. Since then, with the industrialization and scale of glass production, glasses with various uses and properties have come out one after another. In modern times, glass has become an important material in daily life, production and science and technology.
More than 3000 years ago, a European Phoenician merchant ship loaded with crystal mineral "natural soda" sailed on the Berus River on the Mediterranean coast. As the sea ebbed, the merchant ship ran aground, so the crew boarded the beach one after another. Some crew members also carry cauldrons and firewood, and use a few pieces of "natural soda" as the support of the cauldron to cook on the beach.
After the crew finished eating, the tide began to rise. They were about to pack up their things and go on sailing when someone shouted, "Come and see, there are some glittering and translucent things on the sand at the bottom of the pot!" " "
The crew took these shiny things to the ship to study them carefully. They found some quartz sand and melted natural soda sticking to these shiny things.
It turns out that these shiny things are natural soda used to make pot supports when they cook. Under the action of flame, they react chemically with quartz sand on the beach, which is the earliest glass. Later, the Phoenicians mixed quartz sand with natural soda, and then melted it in a special furnace to make glass balls, which made the Phoenicians make a fortune.
Extended data:
Glass has been handed down:
1, good perspective and light transmittance (the visible light transmittance of 3mm and 5mm thick lens glass is 87% and 84% respectively).
The transmittance of near-infrared heat rays in sunlight is high, but it effectively blocks the far-infrared long-wave heat rays produced by the refraction of visible light on indoor walls and floors, furniture and fabrics, so it can produce obvious "greenhouse effect". The transmittance of clean glass to ultraviolet rays in sunlight is low;
2. Sound insulation and certain heat insulation performance;
3. The tensile strength is far less than the compressive strength, and it is a typical brittle material;
4. It has high chemical stability. Generally speaking, it has strong resistance to acid, alkali, salt and chemical reagent box gas, but it will also lead to deterioration and damage under the action of corrosive media for a long time. For example, the weathering and mildew of glass will damage the appearance and reduce the light transmittance;
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