what other things contain inert gases and what gas?
2007-12-24 11:00:16 · 7 answers · asked by Lorr C 1 in Science & Mathematics ➔ Chemistry
Most common incandescent light bulbs are filled with either nitrogen or argon.
The principle cause of the failure of lightbulb filaments is the evaporation of tungsten, which causes weak spots in the filament.
In a vacuum, the rate of evaporation of tungsten is greatly increased over evaporation at normal pressures.
Using an inert gas slows the evaporation of the tungsten, without reacting with the 2000-3000 degree filament.
Nitrogen and/or argon are typically used because they are both readily available and inexpensive.
2007-12-24 12:28:15 · answer #1 · answered by Ben H 6 · 2⤊ 0⤋
The inside of a light bulb is a vacuum filled with an inert gas such as argon. The element inside in Tungsten and at high temperatures can easily react with other substances. Because argon is inert, meaning it does not easily react with other substances, it is suitable for a gas inside the bulb, so that the tungsten stays together for much longer.
2016-04-10 23:29:31 · answer #2 · answered by Anonymous · 0⤊ 0⤋
The first bulbs were evacuated to vacuum. They burned and produced black deposits on the glass with the carbon filaments or the early tungsten filaments. Nitrogen came along. First vacuum, then backfill with almost STP pressure UHP nitrogen. Life went up. Lamp efficiencies went up because of higher temperatures used. In flashlight bulbs, Xenon was used to get even higher temperatures for the filaments and higher efiiciencies.. For the Tungsten halide bulbs, a mix of iodine or bromine is mixed with an inert mix of gas (mostly Nitrogen) to provide an environment for a hot filament which re-deposits tungsten on to the hottest (thinest ) part of a filament. The mix is proprietory and rarely mentioned in patents. The guys with the longest lasting and brightest bulbs get the business.
2007-12-24 12:37:35 · answer #3 · answered by Brian T 6 · 3⤊ 1⤋
Yes. Every neon sign is full of the inert gas neon. Although I grant it won't make a good light bulb, it does produce light. Pther inert gasses used include Argon, and Krypton. They are used as "filler" gasses in many bulbs because they don't react with the filament. Xenon is used in flash lamps and arc lamps because it is very bright when excited.
2007-12-24 11:15:44 · answer #4 · answered by Charles M 6 · 0⤊ 0⤋
There are. In the bulb there is low pressure, and a little inert gas, that can be nitrogene and argon (together) or only argon, or krypton. In the new car lamps can be xenon. The argon is used also for welding.
2007-12-24 11:16:45 · answer #5 · answered by charisz 2 · 1⤊ 1⤋
Not usually, they're in a vacuum. Nitrogen is a very good inert gas. It's used for pressure testing in many systems.
2007-12-24 11:04:18 · answer #6 · answered by Prophet 1102 7 · 0⤊ 1⤋
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2016-07-11 06:37:46 · answer #7 · answered by ? 3 · 0⤊ 0⤋