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The source of the vacuum bottle

The modern thermos bottle was invented by British physicist Sir James Duval in 1892. At the time, he was working on a study to liquefy the gas, which had to be liquefied at low temperatures, first by designing a container that would insulate the gas from the outside temperature, so he asked glass technician Berg to blow a double-glazed container for him, with Mercury on the inner wall of the two layers, and then pumping out the air between the two layers to form a vacuum This vacuum bottle is also called "du bottle", so that the liquid in the inside, regardless of the temperature and heat will remain unchanged for a certain period of time. Because in the home thermos bottle is mainly used for hot water insulation, so also known as Thermos bottle. The structure of the thermos bottle is not complicated. The middle is a double-decker glass bottle gall, between the two layers into a vacuum state, and silver plating or aluminum, vacuum state can avoid hot convection, the glass itself is a hot bad conductor, silver-plated glass can be the container inside the radiation of the heat reflected back.

In turn, if a cold liquid is stored in the bottle, the bottle can prevent the heat from the outside from radiating into the bottle.

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