Quartz infrared heating tube structure and advantages

Quartz infrared heating tubes are a series of tubular lamps that emit infrared light in the 0.75-3μm range and come in a variety of sizes, wattages, and shapes.

They typically consist of a tubular quartz glass tube with a coiled filament. The filament is supported by a circular ring and insulated from the inner wall of the glass tube to prevent damage to the tube wall caused by high temperatures during operation. Common lamp caps include square ceramic caps, metal sheet caps, and small ceramic cylindrical caps. Some lamps are also coated with a directional ceramic reflective coating that reflects infrared energy to further improve heating efficiency.

To achieve an infrared spectrum of 0.75-3μm, the filament temperature typically must reach over 2000°C. Therefore, in addition to an inert gas to protect the filament from oxidation at high temperatures, the tube also requires an appropriate amount of halogen tungsten circulating gas. The halogen tungsten circulating gas combines with tungsten atoms evaporated from the filament at high temperatures and releases these bound tungsten atoms back into the filament at the filament's hot spot, further extending filament life.

Infrared lamps transfer energy directly to the heated object through radiation, resulting in rapid heating, high thermal efficiency, and zero pollutant generation, making them a very clean and environmentally friendly heating method. Furthermore, the filament's low thermal inertia facilitates rapid and precise temperature control.