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 consumed. The material is able to allow electrons on its surface to move at room temperatures without consuming energy, resulting in a significant increase in the operating speeds of computer chips.

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. It is a way to grow single crystalline crystals through melting and crystallizing polycrystalline ingots. The polycrystalline ingot rod is melted only in a small area. The rest is solid.

2. Bridgman method is a method of crystal growth that is commonly used. It’s also known as crucible descending. This method involves putting the crystal-growing material in a cylinder crucible. It is then passed slowly through a resistance furnace or high-frequency oven that has a temperature gradient. The furnace’s temperature should be slightly higher that the melting point of crystal material. The melting of crystal material occurs when the crucible drops into the heating center. If the crucible falls slowly after passing the center, it is the temperature in the bottom that begins to decrease. This method works best with common ionic compound, like halides of metals such as alkali and earth metals.

3. Czochralski 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.