Why is the filament of incandescent lamps commonly used in life made of tungsten filament?

Because tungsten has a high melting point, the filament glows brightly, which is a phenomenon of white-hot non-combustibles, which is the state of white light when the object is heated to 1200 1500.

The resistance is larger. In the case of equal power-on time.

More heat is generated.

It is enough for the tungsten filament to reach the desired temperature for white-hotting.

Because the melting point of tungsten filament is as high as 2700, it will not melt quickly when the power is on, so the filament of incandescent lamps is tungsten filament.

Filament glow is a phenomenon in which non-combustibles become white-hot.

White heating is the state in which an object glows white when it is heated to 1200 1500.

Because tungsten filament has poor electrical conductivity.

The resistance is larger. In the case of equal power-on time.

More heat is generated.

It is enough for the tungsten filament to reach the desired temperature for white-hotting.

It will glow white as a result.

And because of the high melting point of tungsten filament.

Up to 2700 or more.

So it won't melt quickly when powered on.

Therefore, tungsten filament is used for incandescent lamps.

ps: Make a correction to the sniffing 26 downstairs.

After sublimation, the tungsten filament will adhere to the wall of the bulb after condensation.

It will affect the luminous intensity.

In modern times, there are incandescent lamps called iodine-tungsten lamps and tungsten bromide lamps.

Improvements are made specifically for this disadvantage of incandescent lamps.

I hope the landlord doesn't think it's too long......

The stability of tungsten wire is very good, the melting point of tungsten wire is very low, and the temperature can reach 2000 when the light is hot. Tungsten wire is used for stability. Moreover, the resistivity of tungsten wire is relatively large.

This is because the filament in electric lamps can only shine if tungsten filament is used. The characteristics are relatively strong, more convenient and more durable. The service life is relatively long.

Because tungsten filament is very easy to use, it is also very strong, and it is also very safe, and this is also to make the bulb brighter, and even to increase the service life of the lamp, if the situation is very good, it can also make the lamp very beautiful, so I think tungsten filament has many characteristics.

in a spectrophotometer.

as a visible light source. Its spectral active region can be extended to 3 m, so it is also used as a light source in the near-infrared region. Edison.

Also has been working on incandescent lamps.

In order to improve the quality of the bulb and prolong the life of the bulb, Edison tried every means to find a suitable material for making the filament. From the perspective of light source lighting, the light efficiency is low, but the spectrum is wider and red, and it is a line light source, so the color rendering is good. People feel more comfortable working with their visual cells.

Its heat can raise the room temperature in winter! It can also be rheumatism.

Disease. It is used for night lighting in the car, and it has a high degree of safety.

Incandescent lamp is the first to appear also called tungsten lamp, when the current flows through the tungsten filament, a large amount of heat is generated, and the temperature reaches more than 2,000 degrees in the incandescent state, so it is called incandescent lamp. Incandescent lamps are the closest light source to sunlight, with the best color rendering performance and the cheapest, and in the early years, incandescent lamps were the most popular light sources. Incandescent lamps are made by passing an electric current through a tungsten filament, making the filament reach a temperature of 2000 degrees Celsius.

Above, the higher the temperature of the filament, the brighter the light emitted. Light conversion rate.

About 8-10%.

Incandescent lamps, energy-saving lamps, LED lamps.

The root of the difference is the change of the luminaire, in which the name of "energy-saving lamp" is problematic - its natal name is "fluorescent lamp", "fluorescent", "incandescent" and "LED" are all luminous bodies. When fluorescent lamps first appeared, they were more energy-efficient than incandescent lamps, so they were also called "energy-saving lamps". Because most of the electrical energy is converted into heat, it is wasted.

At the same time, because the filament works under the harsh conditions of more than 2,000 degrees Celsius, the life of this lamp is also short, only about 1,000 hours.

Also due to the high temperature and the need for vacuuming, the lamp housing is usually made of glass, which is easily damaged. What makes people who play with lights more like is that LED lights are more plastic. These three points are also the difference between LED lights and the first two.

The incandescent lamp is actually a tungsten lamp, yes, it is the tungsten lamp invented by Edison, which produces a lot of heat by consuming electrical energy, and the temperature of the filament reaches more than 2000 degrees and enters the incandescent state, so it is called an incandescent lamp.

The light emitted by incandescent lamps is white and very energy-efficient. The light emitted by a tungsten lamp is dim and the light penetrates.

In terms of service life, the service life of tungsten lamp is longer than that of incandescent lamp, and it is often used for the direction light of the car; In terms of color temperature, the color temperature of tungsten lamps is generally 2760 2900K, while the color temperature of ordinary incandescent lamps is usually 2500K; In terms of **, tungsten filament lamp is higher than ordinary incandescent lamp**, which is due to the different materials of the filament, the ** of tungsten filament is higher than that of ordinary filament, so the production cost is higher than that of other incandescent lamps.

First of all, in terms of material, their material is different, and secondly, the white paper lamp should be a little brighter, so the black silk lamp looks a little darker, and it consumes more power.

Tungsten is a metallic element with a chemical element symbol of W, atomic number 74, atomic weight, atomic radius of 137 picometers, density grams per cubic centimeter, and belongs to the VIB group of the sixth (second longest) period of the periodic table. The smelted tungsten is a silvery-white lustrous metal with high melting point, high hardness, low vapor pressure, low evaporation rate and stable chemical properties. It is mainly used in the manufacture of filaments and high-speed cutting alloy steel, superhard molds, and is also used in optical instruments and chemical instruments.

The reason why tungsten white light bulb uses tungsten as filament is that the physical properties of tungsten are used: 1Tungsten filament has a high melting point and reaches the temperature required for white-hot filament.

The temperature when the filament glows is up to more than 2,000 degrees Celsius. At such a temperature, the metal has melted in general, and only tungsten has a melting point of high knowledge. 2. Cheap.

It is conducive to the popularization of tungsten light bulbs. 3.Tungsten wire has high resistance and poor conductivity.

It is mainly used in the manufacture of filament, high-speed cutting alloy steel, superhard mold, and is also used in optical instrument bench guessing table, chemical instruments, electronic components, mechanical tools, etc. The reason why incandescent bulbs use tungsten as filament is to use the physical properties of tungsten 1, the melting point of tungsten filament is high to reach the required temperature of white heat, so tungsten filament is not easy to melt at high temperature, and tungsten filament has excellent chemical corrosion resistance. At this temperature, the average metal has melted, with the exception of tungsten, which has a melting point of up to 3,400 degrees Celsius.

It is conducive to the wide promotion of tungsten filament containing coarse bulbs. Compared to other metals, tungsten produces more heat for the same energized time. Tungsten bulb has strong antioxidant ability and is not easy to change with other substances in the air.

To sum up, tungsten filament is the best choice for incandescent lamps.

Because tungsten filament does not melt quickly when energized, tungsten filament is used for incandescent lamps.

Because tungsten has a high melting point, and the chemical properties of tungsten are very stable.

Because tungsten filament can work for a long time in a high temperature environment.

Because the conductivity of tungsten wire is not good, the resistance is large.

Incandescent lamps rely on tungsten filaments and electricity to generate heat.

Because incandescent lamps can easily burn out other metals.

Because tungsten has a high melting point, low resistance and stable chemical properties.

Because tungsten filament has a high melting point and stable chemical properties.

Because the melting point of tungsten wire is as high as 2700 or more

Difference Between Incandescent and Tungsten Lamp: The range is different, and tungsten lamp is a type of incandescent lamp. They are not the same concept.

An incandescent lamp is an electric light source that heats the filament to an incandescent state by electrifying it, using thermal radiation to emit visible light. Since 1879, the American inventor Thomas Alvar Edison made carbon fiber (i.e., carbon filament) incandescent lamp, through the continuous improvement of filament materials, filament structure, and filling gas, the luminous efficiency of incandescent lamps has also been correspondingly improved. In 1959, the United States developed tungsten halogen lamps with very small volume and light decay on the basis of incandescent lamps.

The development trend of incandescent lamps is mainly the development of energy-saving bulbs, and the structure and components of incandescent lamps with different uses and requirements are not the same. The light color and light collection performance of incandescent lamps are very good, but because of the low light efficiency, they have been gradually withdrawn from production and sales.

Tungsten lamp is an incandescent lamp made of tungsten filament. Tungsten filament lamps produce a continuous spectrum for the visible spectral region of 400 780 nm. As a visible light source in a spectrophotometer. Its spectral active region can be extended to 3 m, so it is also used as a light source in the near-infrared region.

Edison has also been committed to the improvement of incandescent lamps, in order to improve the quality of the bulb and extend the life of the bulb, Edison tried every means to find a suitable material for making filament. In the process of developing incandescent bulb filament materials, Edison experimented with cotton thread, thin strips of wood, straw, gauze paper, thread, Manila hemp rope, horsehair, fishing line, hemp chestnut, hard rubber, cork, rattan, maize fiber, and even human beard and hair.

In 1880, Edison developed a carbonized bamboo filament lamp, which greatly improved the life of the filament, and in October of the same year, Edison set up a factory in New Jersey and began mass production, which was the world's earliest commercial incandescent lamp.

Incandescent lamps are also made of tungsten filament.

So incandescent lamps and tungsten lamps are not fundamentally different.

Ordinary incandescent lamps are filled with nitrogen.

Some small tungsten filament lamps are filled with halogen gases, such as iodine.

These lamps are called halogen lamps.

The service life will be longer.

It is often used as a turn signal in a car.

Both incandescent and halogen lamps emit light using the principle of white heat.

Also known as thermolights.

There are a lot of other lights.

The color of the high-pressure mercury lamp is purple, and many street lamps are used to use it, and the high-pressure sodium lamp is yellowish in color, and the small sun is often said on the construction site.

Tungsten lamps belong to incandescent lamps Incandescent lamps may have other filament lamps.

There is no difference, it is a concept.

Because of the metal tungsten.

The melting point is the highest of all metals, and at more than two thousand degrees, it is still solid.

Tungsten is a rare metal with a high melting point that can improve the high-temperature hardness of steel, and tungsten is a silvery-white metal that resembles steel. Tungsten has a high melting point, low vapor pressure, and a small evaporation rate. The chemical properties of tungsten are very stable, it does not react with air and water at room temperature, and when it is not heated, it contains any concentration of hydrochloric acid, sulfuric acid, nitric acid and hydrofluoric acid.

and aqua regia. It has no effect on tungsten, and when the temperature rises to 80°-100°C, among the above various acids, except for hydrofluoric acid, other acids have a weak effect on tungsten. At room temperature, tungsten can quickly dissolve in a mixture of hydrofluoric acid and concentrated nitric acid, but it does not work in alkaline solutions.

In the presence of air, molten alkali can oxidize tungsten to tungstate, and in the presence of oxidants (sodium nitrate, sodium nitrite.

potassium chlorate, lead dioxide) in the presence of tungstate, the reaction to generate tungstate is more violent. At high temperature, it can be combined with oxygen, fluorine, chlorine, bromine, iodine, carbon, nitrogen, sulfur, etc., but not with hydrogen.

There are two variants of tungsten, and . At standard temperature and atmospheric pressure, the model is a stable body-centered cubic structure. Type tungsten can only occur in the presence of oxygen.

It is stable below 630 and converted to tungsten above 630, and the process is irreversible.

There are five isotopes of tungsten that occur in nature.

They all have very long half-lives and can therefore be considered stable isotopes. The average relative atomic mass of tungsten.

It was 184. I hope I can help you with your doubts.

The use of metal tungsten wire as a bulb, first, is that the metal tungsten wire has a high melting point and can withstand high temperatures of 2000 degrees, second, the metal tungsten wire can emit strong light, and third, the metal tungsten wire has enough reserves on the earth.

Because after many and long-term experiments, it is found that the metal tungsten wire has good high temperature resistance, and can withstand high temperatures of up to 2000 when working, and other materials have been used to experiment, but the effect is not as good as the metal tungsten

The filament of incandescent lamps is made of tungsten metal, which takes advantage of the high melting point of tungsten

So the answer is: high melting point