The special applications of cleaned tungsten wire in chemical instruments primarily stem from its high temperature resistance, corrosion resistance, and high electrical conductivity. Specific uses include:
- High-Temperature Heating Element: In equipment such as thermogravimetric analyzers (TGA) and differential scanning calorimeters (DSC), cleaned tungsten wire is used as a heating element, capable of stable operation in environments exceeding 2000°C for precise temperature control. Its chemical inertness ensures resistance to corrosion in aggressive atmospheres (e.g., containing chlorine or sulfur).
- Electrochemical Electrode: In electrochemical analysis instruments (such as potentiometric titrators or conductivity meters), cleaned tungsten wire serves as a microelectrode. Its conductivity and chemical corrosion resistance make it suitable for measuring electrochemical signals in strong acids, strong bases, or organic solvents.
- Catalyst Support: In catalytic reaction research equipment, cleaned tungsten wire can act as a catalyst support, with noble metals or oxide catalysts loaded onto its surface for gas-phase or liquid-phase reactions. Its high surface smoothness and chemical stability prevent interference with the catalytic process.
- Gas Detection Sensor: Due to its thermal sensitivity and conductivity, cleaned tungsten wire can be used as a heating or sensing element in certain gas sensors (e.g., for ammonia or carbon monoxide detection).
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