Tin powder for green powder, the melting temperature of 231.88 ℃. The boiling point of 2270 ℃. Relative density 7.28. It is used as high purity reagent for electronic industry. Mainly used in the manufacture of solder paste, carbon products, friction materials, oil bearing and powder metallurgy structural materials.
The physical and chemical properties of tin powders are silvery white shiny soft metals (tetragonal and cubic) with ductility. Its solubility is soluble in concentrated hydrochloric acid, sulfuric acid, aqua regale, concentrated nitric acid, hot caustic soda solution, slowly soluble in cold dilute hydrochloric acid, dilute nitric acid and hot dilute sulfuric acid, cold caustic soda solution, dissolve more slowly in acetic acid. It is stable in air, but tin powder oxidizes easily, especially in humid air.
Tin is one of the minerals with high degree of exploitation and utilization in nonferrous metals in China. It is widely used in metallurgy, electronics, electrical appliances, chemical industry, building materials, machinery and food packaging industries. As the lead-free trend continues to grow globally, electronics manufacturers will increasingly use tin-powder materials in their products. At the same time, with the increasing awareness of environmental protection, the non-toxic environmental protection properties of tin powder will make it be continuously used in the future medicine, chemical industry, light industry, food, health care, art supplies and other packaging fields. The importance of tin powder has become increasingly apparent.