Neon is a colorless rare gas, it was discharged when the orange-red. Neon is most commonly used in neon lights, the air contains a small amount of neon, in the air neon content of 18ppm. Neon is the second light of the rare gas, it is red in the discharge tube - orange light. Neon cooling capacity than liquid helium 40 times higher than three times higher than liquid hydrogen. Compared to helium in most cases it is a relatively cool coolant. The discharge of neon in all rare gases is the strongest in the same voltage and current conditions. Because of the characteristics of neon discharge, neon is widely used as electric light source gas, filled with neon neon is also widely used. So the question came, why can the neon be glowing? Neon work principle in the end what is it?
What is the working principle of neon First look at why the neon can shine! Who invented the first neon? The first neon lamp was invented by French scientists. They are filled with neon gas bulbs, neon in the electric field under the excitation, emitting a red light. The development of neon can be traced back to the British physicist and chemist Faraday on the study of gas discharge, the current through a small amount of positive and negative ions through the gas, by the role of ultraviolet light, cosmic rays, micro-radioactive substances in the high enough voltage Under the movement, and with the neutral gas molecules after the collision, so that the neutral molecules ionization, and thus the number of ions doubled. Current through the gas is also associated with the phenomenon of light, the so-called glow discharge. The luminous color varies with the filling of the gas. Faraday's theory and its achievements in the experiment, for the development of neon technology has laid a solid foundation.
Neon work principle in the end what is it? Neon by the electrode, the introduction of lines, lamp tube diameter of 6-20mm range. Luminous efficiency and diameter related. Such as: transformer side rated current of 0.03A, low pressure side inflammation 2.05A, neon transformer can be for the diameter of 10 meters, diameter 6-10 mm lamp length of 8 meters. Due to the lamp more thin, tube pressure will be large, can supply the neon tube will be shorter. When the external power supply circuit is connected, the transformer output will produce thousands of volts or even tens of thousands of volts of high pressure. When this high voltage is applied to the electrodes at both ends of the neon lamp, the charged particles in the neon bulb are accelerated in the high voltage electric field and fly to the electrode, which can generate a large amount of electrons. These excited electrons are accelerated in high voltage electric fields and collide with gas atoms in the lamp. When these electrons hit the free gas atoms of the energy is large enough, it can make the gas atoms ionization and become positive ions and electrons, which is the gas ionization phenomenon. The collision between the charged particles and the gas atoms, the excess energy is emitted in the form of photons, which completes the neon light lit the whole process.
In addition to understanding the working principle of neon, there are many friends wonder why the neon can issue different colors of light! On the eve of the Second World War, photoluminescent materials were developed. This material not only can send a variety of colors of light, and luminous efficiency is also high, we call it a phosphor. Phosphor is used in the production of neon, the brightness of the neon has not only improved significantly, and the color of the lamp is more vivid, varied, but also simplifies the process of making lights. Therefore, after the end of the Second World War, neon has been rapid development. Neon lamp according to the glass tube wall of the different powder, divided into three types: the first is not painted any glass inside the phosphor, the direct use of colorless transparent glass tube, usually known as the tube; the second is In the transparent glass tube coated with phosphor, we call it powder tube; the third is the use of stained glass tube, and in the glass tube wall evenly coated with phosphor, we call it CPT.