Physical and chemical properties: the molecular weight 255.8, white powder, density of 5.01, melting point 2410 ℃, insoluble in water and alkali, dissolved in acid.

Areas of application:
(1) non-ferrous alloy iron and steel, and the additives. FeCr alloy usually contains 0.5-4% y, y can enhance the stainless steel oxidation stability and durability; MB26 alloy the addition of appropriate amount of rich y mixed re, the comprehensive performance of alloy significantly improved, can replace part of aluminium alloy used for the stress of the strong aircraft components; In the Al-Zr alloy to add a small amount of rich y rare earth, can improve the alloy conductive rate; The alloy already for the domestic most wire factory use; In the copper alloy with yttrium, improve the electric conductivity and mechanical strength.
(2) contain 6% and 2% of y aluminum nitride ceramic materials, can be used to grind