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What property does tungsten have that make it suitable for making filament?
Wiki User
∙ 12y ago
the reason that tungsten is better then carbon for light filaments is because the melting point is higher,. the melting point of carbon is only 3550, as where tungstens melting point is 3695
Wiki User
∙ 15y ago
Wiki User
∙ 12y agoThey say that tungsten is a good conuctor of heat. I am still not sure.
If I know, i will post it on Tungsten 2345678910.
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Who invented the tungsten filament lamps?
Thomas Edison It was actually Irving Langmuir (of General Electric), also an American. Edison's incandescent lamp used a carbon filament, as did that of his contemporary, England's Joseph Swan who got there before Edison (who invented a longer lasting carbon filament). William Coolidge improve on Langmuir's filament by making it longer (the familiar twisted shape) and brighter. Humphrey Davy had invented a platinum filament way back in 1809 that worked, but was too expensive for commercial use. Those that followed him failed to cotton on to the use of a metallic filament and went for carbon instead. What Tomas Edison can claim is the 'development' of a commercially useful light bulb using a carbon filament - though this was superseded by the tungsten filament not long after.
Is tungsten a metal or a non metal?
Tungsten is a Transition metal. Thus for making it a metal.
What are some of the components in a light bulb?
The bulb and the filament are the two main components of an incandescent light bulb.
What type of steel is best suited for making permanent magnets?
tungsten
What kind of soil is most suitable for making toys?
The clay is most suitable for making toys.
Suggest the physical property that can render tungsten suitable for making filament of tungsten light bulb?
The physical property that can render tungsten suitable for making filament of tungsten light bulbs is incandescence.
Which metal is used in making filament of a bulb?
The metal is Tungsten.
Why the filament of a bulb is made of tungsten but not of copper?
Because when heated, copper would react with the oxygen in the air and oxidise. Tungsten is not as reactive (I think, but check). I think Argon can also be used as a light bulb filament. Tungsten has a higher melting point than all other metals (3422 degrees C) and a very low coefficient of expansion, making it suitable for the filament in incandescent light bulbs. Argon is an inert gas used in incandescent bulbs to prevent chemical reactions which might degrade the filament.
Which elements is used in light bulbs as a filament?
Tungsten ( chemical name Wolfram ) is used for the filament of an incandescent lamp. This is due to ability for making fine guage Tungsten wires , mechanical strength of such wires and the High melting point , which is considerably more than the normal operating temperature of the filament.
Which elements are used to make a filament?
The most common element used in making filaments is Tungsten.
How do you identify Tungsten?
Tungsten is heavy and fragile . Pure tungsten metal should be in dark grey color, tungsten metal usually use in industrial for filament and making steel. Another important part for tungsten is the tungsten carbide, usually use in jewelry. Tungsten carbide jewelry are in bright silver color, it's made from the 85.7 tungsten carbide and together mixed titanium.
Who invented the tungsten filament lamps?
Thomas Edison It was actually Irving Langmuir (of General Electric), also an American. Edison's incandescent lamp used a carbon filament, as did that of his contemporary, England's Joseph Swan who got there before Edison (who invented a longer lasting carbon filament). William Coolidge improve on Langmuir's filament by making it longer (the familiar twisted shape) and brighter. Humphrey Davy had invented a platinum filament way back in 1809 that worked, but was too expensive for commercial use. Those that followed him failed to cotton on to the use of a metallic filament and went for carbon instead. What Tomas Edison can claim is the 'development' of a commercially useful light bulb using a carbon filament - though this was superseded by the tungsten filament not long after.
What is the function of the Tungsten filament in a light bulb?
Because it has a very very high melting temperature: 6191F, 3422C. However it is also very difficult to work with, so early light bulbs used carbon for making the filament instead. Around the year 1900, carbon filaments were replaced with tantalum filaments. It was not until about 1910 that it became practical to make tungsten filaments.
How reactive is tungsten the element?
Tungsten is very inert compared to most elements. This gives it the high boiling point that makes it suitable for applications like making water heater coils and bulb filaments.
What property of gold makes it most suitable for jewelry-making?
Its Malleability
What causes a light bulb to turn black when they burn out?
As an incandescent light bulb is used, tungsten slowly evaporates from the filament causing it to get thinner. When it gets too thin it can no longer carry the current and part of it melts causing the bulb to blow out.
Why does tungsten halogen lamp have a longer life span than the tungsten filament lamp?
One of the problems all incandescent lamps have is evaporation/sublimation of the filament. You might have a hard time imagining a metal like tungsten becoming vapor, but it does, its slow but the filament does turn to vapor. In ordinary lamps this hot tungsten vapor condenses out on the cool glass envelope, darkening it. The filament slowly gets thinner too and as it does some parts begin to thin faster, those parts get hotter causing the tungsten to evaporate faster making them thin even faster. Eventually some part of the filament gets too thin and the lamp burns out.In a halogen lamp part of the fill gas of the lamp is a halogen (e.g. chlorine, bromine). Metal vapor and the halogen gas react, creating a metal halide gas. High temperature breaks down this metal halide gas, depositing the metal and reforming the original halogen gas (the catalyst). As the highest temperature in the lamp is on the filament (with the hottest parts of the filament being the thinnest), the tungsten is deposited right back on the filament where it came from (with more of it being deposited on those parts that are thinnest, thus patching them back up). Thus since the filament in a halogen lamp thins much much more slowly (and is self patching when spots thin faster, instead of running away and thinning even faster) than that in an ordinary lamp it takes much longer before it burns out.
