Cesium Tungsten Bronze Applied for Nano Heat Insulating Film

Cesium tungsten bronze is optimum functional material for preparing nano heat insulating film with the characteristics of high transparency and environmental protection. The low-temperature superconducting properties and low resistivity properties of cesium tungsten bronze have been reported for a long time, but the research on optical properties started late. In 1997, some experts prepared MxWO3 (M=K, Rb, Cs) tungsten bronze crystals by gas phase chemical transfer method, and studied the reflection spectra of various tungsten bronzes. The reflection spectrum showed MxWO3 (M=K, Rb, Cs) tungsten bronze has a high reflectivity in the near-infrared region, that is, it has thermal insulation properties.

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However, why do we need to insulate the glass? Glass heat insulation is an important part of the building's peripheral protection system. Glass energy consumption accounts for 40-50% of the total energy consumption of the building. If the energy escaped from the glass doors and windows is neglected, it is hard to realize energy efficiency. The National 13th Five-Year Energy Saving and Emission Reduction Comprehensive Work Plan states that the target for 2020 is that the national GDP energy consumption will be reduced by 15% compared with 2015, and the total energy consumption will be controlled within 5 billion tons of standard coal. The plan focuses on strengthening energy conservation in key areas such as construction, industry and transportation. This means that heat insulation materials such as cesium tungsten bronze will have wider application prospects.

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