Bismuth sputtering targets(Bi)产品概况

Bismuth is a chemical element with chemical symbol Bi, atomic number 83 and atomic weight 208.98040 u. Bismuth is a pentavalent post-transition metal with chemical properties similar to arsenic and antimony belonging to the same nitrogen group. Bismuth can be found in nature, and its sulfide and oxide are important commercial ores. The density of pure bismuth is 86% of that of pure lead. When it is first produced, it is a silver-white brittle metal, but its surface turns pink after oxidation. Bismuth is a natural antimagnetic metal and one of the elements with the lowest thermal conductivity.

Bismuth has long been considered as the most stable element with the largest atomic order, but in 2003, scientists found that its only stable isotope, bismuth-209, actually has extremely weak radioactivity and will α Decay, half-life is more than one billion times the age of the universe. [3] Because the half-life of bismuth is extremely long, and its tiny radioactivity will not cause any impact on organisms (even much lower than the radioactivity of human body), it can still be regarded as a stable element in almost all applications.

With the decrease of the scale, the thin film materials show more and more physical properties that are not reflected in the bulk materials. The causes and applications of these properties and accompanying phenomena attract more and more attention. For half a century, semi-metallic bismuth (Bi) has been used as an important material for studying quantum transport effect and finite size effect due to its extremely low carrier concentration, extremely small carrier effective mass and relatively large Fermi wavelength. The special energy band structure and peculiar transport properties of its thin films have been continuously recognized.
Purpose - manufacturing low melting point solder and fusible alloy, metallurgical additive, medicine, chemical reagent, semiconductor, national defense industry (lead gun and spray gun)