Tag: bismuth telluride

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The Property And Application of Bismuth Telluride

What property does Bismuth Telluride have?

Bismuth telluride The molecular formula for this powder is Bi2Te3. Bismuth telluride, an indirect band gap semiconductor, has a bandgap of 0.145eV at room temperature, electron mobility of 0.135m2/(V*s) and hole mobility of 4.x10-2m2/ (V*s), and a coefficient of thermoelectric quality of 1.6x10-3/K.
Bismuth Telluride is a dense material with a density 7.8587g/cm3 at a melting temperature of 585degC. It is bound with covalent and has an ionic bond. Bismuth telluride exhibits the characteristics of a topological insulate, allowing electrons flow freely over its surface.

The Bridgman method is one of the preparation methods for bismuth Telluride. Other methods include zone smelting and Czochralski. Bismuth telluride, a semiconductor, has a good electrical conductivity and mediocre thermal conductivity.

What is the use of Bismuth telluride?

Bismuth-telluride-based semiconductors have high performance thermoelectric conversion in the low- and mid-temperature range. These materials are widely used to control temperature and for local refrigeration in microelectronics. The applications of these devices are excellent in thermoelectric power generation and industrial waste heat recovery.

Through alloying, phonons scattering can improve to reduce thermal conductivity and carrier concentration to optimize the electrical performance. This will enhance the thermoelectric performance.

The dangers of bismuth-telluride are low but it can be fatal in large doses. The material is able to allow electrons on its surface to move at room temperatures without consuming energy, which can lead a significant increase in the speed.

Tech Co., Ltd. is a professional Bismuth Telluride We have over 12 year experience in research and development of chemical products. You can contact us for high quality Bismuth Telluride. Contact us Send an inquiry.

2023-08-10

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Study on Semiconductor Material Bismuth Telluride

What property does Bismuth Telluride have?

Bismuth-telluride, a powdery gray substance with the formula Bi2Te3, is a material that contains a high concentration of bismuth. Bismuth telluride, a semiconductor, has a good electrical conductivity but mediocre thermal conductivity. It is not fatal to consume large quantities of bismuth, but it can cause serious harm if taken in excessive amounts. The material is able to allow electrons on its surface to move at room temperatures without using energy, which can lead to a significant increase in the speed of chip operation.

What is the preparation method of Bismuth Teluride?

Bismuth Telluride Powder Materials can be made into various devices. There are several common preparation methods: plasma activated sintering, hot pressing, Bridgman and zone melting.

1. Zone melting: This is a method for growing single crystals through melting and crystallization polycrystalline ingots. The rod-shaped ingot of polycrystalline material is melted only in a small area. The rest is left solid.

2. Bridgman method is a method of crystal growth that is commonly used. It's also called crucible descending. This method involves putting the crystal-growing material in a crucible that is shaped like a cylinder, and passing it slowly through a resistance furnace or high-frequency oven with a gradient of temperature. The temperature of a furnace should be slightly greater than the melting points of crystal materials. When the crystal material in the crucible falls into the heating center, it begins to melt. If the crucible drops slowly after passing the center, then the temperature begins to drop at the bottom. This method works best with common ionic compound, like halides of metals such as alkali and earth metals.

3. Czochralski method (also called Chukraski technique): Chukraski, in 1917, invented this method to produce high-quality single crystalline from melt. This method involves placing crystal material in a crucible. Use the pull rod after the crystal melts and heats the crucible.

Tech Co., Ltd. is a professional Telluride of bismuth We have over 12 year experience in research and development of chemical products. You can contact us for high quality Bismuth Telluride. Contact us Send an inquiry.

2023-08-01

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What is the Formula For Rubidium Phosphate?

what is the formula for rubidium phosphate?

The formula for rubidium phosphate is RbH2PO4, which means that there are 2 cations with a 1+ charge and a single anion with a 1+ charge. This is how ionic compounds are formed by the transfer of electrons from one cation to another cation or anion.

What is the formula for dihydrogen phosphate?

The formula of dihydrogen phosphate is H2PO4 with a charge of 1. This is why it has three acidic hydrogens, which can be removed by neutralization.

What is the formula for phosphorous?

The chemistry of phosphorous is very similar to that of bicarbonate and carbonate. The chemistry of these two acids is very similar to that of phosphine and dihydrogen phosphate, but a different molecule structure.

What is the formula for niobium dihydrogen phosphate?

The cation of niobium dihydrogen phosphorous is niobium with a charge of 1+ and the anion is dihydrogen with a charge of -1. This is why niobium dihydrogen phosphine has a formula of NH2 and niobium dihydrogen carbonate has a formula of CO3 with a charge of -1.

What is the formula for octahedral niobium phosphate?

The atomic structure of the compound is very similar to that of niobium dihydrogen carbonate but with a different molecule structure. It is a triangular crystal with TeO6 polyhedra and [H2PO4]-, [HPO4]2- and [HPO4]-TeO6 sheets perpendicular to the c- direction.

It is a very interesting material to study because it shows very interesting properties such as protonic conduction. However, it is not very well understood and the structural studies are still incomplete. This is because this material is too complex to be studied using only single crystals.

2023-04-20

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