Glass filled in nitrogen

Glass filled in nitrogen, to form a thin filament stability around the protective layer of gas so that the filament can work at higher temperatures, and effectively restrain the evaporation of tungsten, tungsten overcome the performance in the course of defective (until today, inflatable bulb production process is still an important process). after the incandescent light in order to improve efficiency, extend bulb life, people once again in the filament of the composition and structure of the upper and lower foot of the effort. inventors have introduced a new element rhenium mmm. rhenium the advantage of not only the high melting point corrosion resistance, and mechanical properties, electrical resistivity is much higher than that of tungsten. rhenium plated tungsten wire, the strength and resistance greatly enhanced life span can be extended by five times!
At the same time, people began to spiral filament made of, so doing can reduce the occupied space, improving luminous efficiency, the other can continue to reduce tungsten evaporation, to extend the useful life's sense .1936, the people made a double helix filament, so that the working temperature of inflatable incandescent up to 2500. more, even to the incandescent lamp used in photography 3000.: the first generation of incandescent mature. .in the 20th century to the 21st century, the incandescent lighting apparatus has been the largest family in a beautiful landscape.