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Overview of Nano bismuth

wallpapers News 2021-08-17
Bismuth is a silvery-white to pink metal, brittle and easily crushed, and its chemical properties are relatively stable. Bismuth exists in the form of free metals and minerals in nature. In the past, bismuth was considered to be the most stable element with the largest relative atomic mass, but in 2003, it was discovered that bismuth has extremely weak radioactivity.
Bismuth exists in the form of free metals and minerals in nature. The minerals include bismuthite, bismuth and so on. Metal bismuth is obtained by calcining minerals into bismuth trioxide, and then co-thermally reduced with carbon. High-purity bismuth can be obtained by fire refining and electrolytic refining.
The content of bismuth in the crust is not large, 2×10-5%. In nature, bismuth exists in two states: elemental and compound. The main minerals are bismuthite (Bi2S3), bismuthite (Bi2O3), and bismuthite (nBi2O3·mCO2·H2O), copper bismuth ore (3Cu2S·4Bi2S3), galena (2PbS·Bi2S).
Bismuth in nature has sulfide bismuthite (Bi2S3) and oxide bismuth oxide (Bi2O3), or bismuth loess, which is formed by oxidation of bismuthite and other bismuth-containing sulfides. Because bismuth has a low melting point, it can be reduced from its natural ore with charcoal. Therefore, bismuth was obtained by ancient people, but because bismuth was brittle, hard, and lacking in ductility, the ancient people did not find its application after obtaining it but left it in the alloy.
Physical and chemical properties of bismuth
Pure bismuth is a soft metal. The main ore is bismuthite (Bi2S3) and ocherite (Bi2o5). Liquid bismuth expands when it solidifies.
It is brittle, and has poor electrical and thermal conductivity. Bismuth selenide and telluride have semiconductor properties.
The metallic bismuth is a metal with silvery white (pink) to light yellow luster, which is brittle and easily crushed; at room temperature, bismuth does not react with oxygen or water, and is stable in the air. .Poor electrical and thermal conductivity; previously, bismuth was considered to be the most stable element with the largest relative atomic mass, but in 2003, it was discovered that bismuth is weakly radioactive, which can be transformed into thallium-205 by alpha decay. Its half-life is about 1.9X10^19 years, reaching 1 billion times the age of the universe.
When heated above the melting point, it can burn and emit a light blue flame to produce bismuth trioxide. Bismuth can also be combined with sulfur and halogen when it is red hot. Bismuth is insoluble in water and insoluble in non-oxidizing acids (such as hydrochloric acid). Even concentrated sulfuric acid and concentrated hydrochloric acid only react slightly when heated together, but it is soluble in aqua regia and concentrated nitric acid. Among them, the +5 compound NaBiO3 (sodium bismuthate) is a strong oxidant.
Supplier of Nano Bismuth Powder
As a global supplier of nano bismuth powder, Tanki New Materials Co. Ltd has extensive experience in the performance, application and cost-effective manufacturing of advanced and engineered materials. The company has successfully developed a series of powder materials (including boron carbide, Aluminum carbide, titanium carbide, etc.), high-purity targets, functional ceramics and structural devices, and provide OEM services.


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