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Realization of energy-saving glass using photonic crystals

Frontiers in energy 2018年第1期12卷 178-184页

作者： Yen-Hsiang CHEN Li-Hung LIAO Yu-Bin CHEN Department of Mechanical Engineering Cheng Kung University Tainan701 Taiwan China Department of Power Mechanical Engineering TsingHua UniversityHsinchu 300 Taiwan China

This work successfully developed an energy- saving glass with wavelength selectivity. The glass is composed of a SiO2 substrate and two layers of three- dimensional photonic crystals. Each crystal is composed of identical and transparent polystyrene spheres after their self-assembling. The glass then possesses dual photonic band gaps in the near-infrared region to suppress penetration of thermal radiation. Experimental results show that the energy-saving glass decreases temperature increment in a mini-house. Moreover, the temperature after thermal equilibrium is lower than that inside a counterpart using ordinary glass.

关键词： energy-saving glass photonic crystals poly-styrene spheres self-assembly

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Sodium tungsten bronze(Na_(x)WO_(3))-doped near-infrared-shielding bulk glasses for energy-saving applications

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Journal of Materials Science & Technology 2021年第30期89卷 150-157页

作者： Guang Yang Yunhang Qi Daming Hu Haochen Wang Hongfei Chen Liangmiao Zhang Chuanxiang Cao Bin Liu Fang Xia Yanfeng Gao State Key Laboratory of Advanced Special Steel Shanghai UniversityShanghai200444China School of Materials Science and Engineering Shanghai UniversityShanghai200444China Chemistry and Physics Murdoch UniversityPerthWA6150Australia Harry Butler Institute Murdoch UniversityPerthWA6150Australia

Tungsten bronze coatings and films have attracted global attention for their applications in near-infrared(NIR)-shielding ***,they are unstable in strong ultraviolet,humid heat,alkaline and/or oxidizing environments and are difficult to be coated on glass surfaces with complex ***,we address these limitations by doping sodium tungsten bronze(Na_(x)WO_(3))into bulk glasses using a simple glass melting method.X-ray diffraction,Raman spectroscopy,X-ray photoelectron spectroscopy,TEM and SEM-EDS characterization confirmed the presence of sodium tungsten bronze(Na_(x)WO_(3))functional units inside the 34SiO_(2)-38B_(2)O_(3)-28NaF glass *** the functional units are well protected by the glass matrix,the fabricated glasses are stable under hot,humid,oxidizing conditions,as well as under ambient conditions,with no change after 360 *** NIR-shielding performance of these glasses can be adjusted to as high as 100%by varying WO_(x)concentration(2-8 mol%)and quenching temperature(1000-1400℃).With a content of 6 mol%WO_(x)and a quenching temperature of 1000℃,the bulk glass shows 63%transmission of visible light and only 11%transmission of NIR light at 1100 *** insulation experiments show that the NIR-shielding performance of the glasses are far superior to commercial soda lime window glass or indium-doped tin oxide(ITO)glass,and comparable to cesium tungsten bronze coated *** novel bulk glasses have higher stability,simpler processing,and can be easily made into complex shapes,making them excellent alternative materials for energy-saving glasses.

关键词： Tungsten bronze Tungsten oxide Near infrared shielding energy-saving glass

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