Tungstent Applications In Light Bulb
【Chinatungsten Online News Net- Tungsten News】
When Thomas Edison and other scientists were working on developing the electric light bulb, they experimented with a number of materials for the light-producing filament. Until the early 20th century, the most successful incandescent light bulbs utilized a filament of carbonized bamboo, which lasted about 1,200 hours. Edison wasn’t the first to use tungsten, which was introduced as an incandescent light bulb filament in Europe in 1904.
In 1906, Edison's company General Electric (GE) developed a process for making pure tungsten flexible enough to draw into a coiled wire. Using a coiled wire allowed GE to increase the surface area of tungsten that would be inside the bulb. By 1911, the company was manufacturing and selling light bulbs using the new filaments, which outlasted all others. Advances in this technology continued almost uninterrupted, so that the cost of operating an incandescent bulb by the turn of the 21st century was less than 5% of what it was in 1911.
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