Metallic Selenium granules are inorganic non-metallic materials with semiconductor properties and are widely used in electronics, optoelectronics, metallurgy and other fields. Its core value lies in its unique physical and chemical properties, which can meet the special functional requirements of multiple industries.

1. Basic Properties

  • Chemical formula: Se (selenium); pure products are the metallic form of elemental selenium.​
  • Appearance: Typically appears as gray or black lumps/granules, with a metallic luster on the surface.​
  • Key parameters: Melting point around 217℃; brittle solid at room temperature; exhibits unidirectional conductivity under specific conditions.

2. Key Characteristics

  • Semiconductor performance: High resistivity at room temperature; resistivity drops significantly as temperature rises, making it a typical intrinsic semiconductor.​
  • Outstanding photosensitivity: Conductivity increases sharply when exposed to light — a trait central to its application in the optoelectronic field.​
  • Chemical stability: Does not react with water or air at room temperature; resists weak acid and alkali corrosion, easing storage and processing.

3. Main Application Fields

  • Electronics industry: Used to make selenium rectifiers and selenium photocells; leverages its unidirectional conductivity and photosensitivity for energy conversion and signal detection.​
  • Metallurgical industry: Added as an additive to metals like copper and steel, enhancing the materials’ cutting performance and mechanical strength.​
  • Glass/ceramic industry: Acts as a decolorizer to effectively remove iron ion impurities from glass; also imparts specific colors (e.g., red) to ceramics.