Abstract View
Size Effect on the NIR Sheilding of Sodium Tungsten Bronze Particles
HAO TU, Wei-Ning Wang, Da-Ren Chen, Virginia Commonwealth University
Abstract Number: 578
Working Group: Nanoparticles and Materials Synthesis
Abstract
Because nearly half of the energy in solar radiation is in the infrared (IR) range, it is very desired to have transparent media with the NIR (Near-Infrared) shielding function in order to save energy for the air conditioning of buildings and vehicles. Tungsten bronze oxides (MxWO3), which could be applied to transparent media, e.g., glasses, are one of potential candidates for accomplish the above task. We had previously introduced an aerosol-assisted method to produce crystalline tungsten bronze particles in one step and without any aftertreatment. In the effort to search for the NIR shielding performance optimization of MxWO3 particles, we found the previous works were primarily focuses on the effects of elemental species and crystal phases. The size effect on the NIR shielding of MxWO3 particles is very scattered. In this investigation, we obtain particle samples in different sizes and tungsten bronze species through the aerosol processing after tungstenbrone particles are produced by our aerosol-assisted method. The transmission spectrum of prepared samples (in VIS-NIR range) were measured. It is found that the smaller the tungsten bronze particle size the higher the visible light transmittance (VLT). Through the engineering of the size distribution and species, the VLT and NIR shielding of tungsten bronze particles could be optimized. The detail of our preparation method and the findings will be presented in this presentation.