What is Cesium Tungsten Bronze Infrared Absorber?

Cesium Tungsten Bronze Infrared Absorber, commonly referring to nano-cesium tungsten bronze powder (CTO), is an inorganic nanomaterial with excellent infrared absorption properties. Below is a detailed introduction:

1. Basic Information
   • Appearance: Deep blue powder
   • Molecular Formula: Cs₀.₃₃WO₃
   • CAS Number: The specific CAS number may vary depending on the manufacturer.
2. Performance Characteristics
   • Infrared Absorption Performance:
     Nano-cesium tungsten bronze powder exhibits significant absorption in the near-infrared region (wavelengths 800–1200 nm) and high transparency in the visible light region (wavelengths 380–780 nm). This enables it to effectively absorb and convert infrared radiation into heat energy without affecting the transparency of the material.
     Compared to other infrared absorption materials (such as nano-tin antimony oxide, ATO), cesium tungsten bronze powder has good shielding capabilities across the entire infrared spectrum, especially in the near-infrared range, effectively blocking infrared radiation in the wavelength range of 780–2500 nm.
   • Electrical Conductivity:
     Due to its composition, nano-cesium tungsten bronze powder typically has good electrical conductivity, making it potentially useful in the conductive layers of electronic devices.
   • Tunability:
     Its absorption performance can be customized by adjusting the material’s composition and structure to meet specific application requirements.
3. Application Areas
   • Construction Industry:
     Cesium tungsten bronze powder is widely used to prepare transparent thermal insulation coatings. These coatings, when applied to the glass façades of buildings, do not affect the transparency of the glass while effectively blocking infrared radiation, reducing indoor temperatures, and improving the building’s energy efficiency.
   • Automotive Window Films:
     In the automotive industry, transparent thermal insulation films made with cesium tungsten bronze powder are commonly used. These films help reduce the temperature inside the vehicle, ensuring a comfortable driving experience even in hot summer weather.
   • Textile Industry:
     Cesium tungsten bronze powder is used to make thermal clothing. The fibers are infused with cesium tungsten bronze particles, which can absorb and reflect the heat emitted by the human body, providing warmth.
   • Military Industry:
     Cesium tungsten bronze powder is also used to produce military stealth uniforms. It can absorb and scatter radar waves, reducing the likelihood of detection by enemy radar.
   • Industrial Manufacturing:
     In laser marking and laser welding applications, cesium tungsten bronze powder is used due to its absorption properties for specific wavelength lasers. During metal part marking, the powder absorbs the laser energy, forming clear, durable markings on the surface. In welding, it absorbs laser energy and converts it into heat, enabling precise and efficient welding.
   • Medical Field:
     Cesium tungsten bronze powder is used in photothermal therapy. By injecting cesium tungsten bronze nanoparticles into the human body and exposing them to an external light source, the light energy is converted into heat to destroy cancer cells.
   • Optical Field:
     In infrared filter manufacturing, cesium tungsten bronze powder is used due to its optical properties, such as high refractive index and low extinction coefficient. It can selectively transmit or reflect infrared radiation at specific wavelengths.

In summary, Cesium Tungsten Bronze Infrared Absorber is an inorganic nanomaterial with excellent infrared absorption properties, good electrical conductivity, and tunability. It has broad application prospects in various fields.

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