The mercury vapor pressure during ignition is 2 to 5 atmospheres, and the inner tube is made of quartz glass. The ultraviolet spectrum of the high-pressure mercury lamp is broadened and blue-green, which can be used for photochemical reactions, lithography machines, ultraviolet detection and fluorescence analysis. In order to make the high-pressure mercury lamp use in illumination, it is often improved in the following two ways: 1 outside the quartz inner tube, plus a glass shell, the inner wall is coated with a higher temperature resistant phosphor, and the ultraviolet radiation is converted. The red visible light makes the radiation spectrum of the high-pressure fluorescent mercury lamp close to warm white and has high luminous efficiency. 2 The inner wall of the glass casing is not coated with phosphor, and a tungsten wire is connected in series between the casing and the quartz lamp tube, which acts as both a ballast and a red light that is lacking in the high-pressure mercury lamp to improve the color of the light. This type of high-pressure incandescent mercury lamp is easy to use and can be directly connected to a 220 volt AC power source. The luminous efficiency is lower than that of a high-pressure fluorescent mercury lamp, but higher than that of an incandescent lamp.
It refers to a mercury vapor arc lamp with a mercury vapor pressure of 51-507 kPa, a main emission wavelength of 365.0 nm and a comparable energy of 327.3 kJ/mol. High-pressure mercury lamp is a UV-cured standard lamp. It has a large heat and needs to be cooled by air or water, but it has high power and is suitable for photocurable coatings and ink coating lines requiring fast curing rate. Since the advent of incandescent lamps in 1879, people have had an indissoluble bond with electric lights. With the continuous development of science and technology, new lights in the electric light source family have come forth in large numbers. The high pressure mercury lamp is also an efficient and long life electric light source. It consists of a fluorescent bulb and a discharge tube. The discharge tube is thin and short, only the size of a human finger, containing high-pressure mercury vapor, and a cotton-shaped fluorescent bulb outside the discharge tube. After being energized, the discharge tube generates strong visible light and ultraviolet rays, and the ultraviolet rays are irradiated on the fluorescent bulb to emit a large amount of visible light. The light emitted by the high-pressure mercury lamp does not contain red, and the object it emits is blue, so it is only suitable for lighting in squares and streets.
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