Cesium-doped tungsten oxide (Cs₀.₃₃WO₃), also known as cesium tungsten bronze or cesium-doped tungsten oxide, is a functional material renowned for its excellent optical, thermal, and electrical properties. Here’s a detailed breakdown of its characteristics and applications:
- Basic Information
- Chemical Formula: Cs₀.₃₃WO₃
- English Name: Cesium Tungsten Bronze
- CAS Number: 189619-69-0
- Molecular Weight: 276 g/mol
- Physical Properties
- Particle Size: Typically less than 100 nm, though the exact size may vary depending on the preparation methods and quality control standards.
- Color: The material is typically blue, which gives it distinct visual recognition.
- Optical Properties
- Near-Infrared Absorption: Cesium-doped tungsten oxide nanoparticles strongly absorb in the near-infrared region (800-1200 nm), making it an effective infrared absorber.
- Visible Light Transmission: The material has a high transmission rate in the visible light range (380-780 nm), meaning it can effectively block near-infrared radiation without affecting visual clarity.
- Mid-to-Far Infrared Absorption: It also exhibits good absorption in the mid-to-far infrared region (8-10 μm), enhancing its thermal insulation properties.
- Applications
- Thermal Insulation Materials:
- Automotive Industry: Used in automotive window films, PVB heat-insulating laminated films, and more, improving both safety and comfort.
- Building Sector: As transparent heat-insulating window films or coatings, it enhances the thermal insulation of buildings, contributing to energy efficiency by keeping buildings warm in winter and cool in summer.
- Transparent Insulating Coatings: By incorporating Cs₀.₃₃WO₃ powder into coatings, transparent heat-insulating paints with excellent thermal properties can be produced, widely used in construction and automotive industries.
- Other Fields: Due to its unique properties, cesium-doped tungsten oxide may also find applications in areas such as medical treatments (e.g., photothermal and photodynamic therapy for tumors) and textiles.
- Preparation Methods
The synthesis of cesium-doped tungsten oxide can be achieved through various methods, typically involving tungsten acid and sulfates as raw materials. Techniques like solvothermal processes or other chemical methods are used to produce Cs₀.₃₃WO₃ nanoparticles, which can then undergo further processing (such as grinding) to obtain the desired form (e.g., powder or dispersion).
- Conclusion
Cesium-doped tungsten oxide (Cs₀.₃₃WO₃) is a promising material with remarkable optical, thermal, and electrical properties. It has broad potential applications, particularly in thermal insulation, transparent coatings, and other high-performance materials. With continued advancements in technology and preparation processes, its performance and range of applications are expected to expand further.
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