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What property does Bismuth Telluride have?
Bismuth-telluride is gray powder that has the molecular Formula Bi2Te3. Bismuth telluride, a semiconductor, has a good electrical conductivity but mediocre thermal conductivity. It is not fatal to consume large amounts of bismuth, but it can cause serious harm if it is ingested. The material is able to allow electrons on its surface to move at room temperatures without consuming energy, which can lead to a significant increase in the chip’s operating speed.
What is the preparation method of Bismuth Teluride?
Bismuth Telluride Powder Materials can be made into many commonly used devices. There are several common preparation methods: plasma activated sintering, hot pressing, Bridgman and zone melting.
1. Zone melting method is a way to grow single crystalline crystals through melting and crystallization polycrystalline ingots. The polycrystalline ingot rod is melted only in a small area. The rest of it is solid.
2. Bridgman method is a method of crystal growth that is commonly used. It’s also known as crucible descending. The crystal growth material is put in a crucible with a gradient of temperature and passed slowly through a high frequency furnace or resistance oven. The temperature of a furnace should be slightly greater than the melting points of crystal materials. The melting of crystal material occurs when the crucible drops into the heating center. If the crucible falls slowly after passing through this center, it is the bottom temperature that begins to drop. 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.