铝掺杂铯钨青铜耐湿热稳定及透明隔热性能研究

doi:10.11896/cldb.25080215

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Abstract Cesium tungsten bronze (Cs_0.32WO₃) has emerged as a promising candidate for smart energy-saving windows due to its exceptional near-infrared (NIR) shielding properties while maintaining high visible-light transmittance. However, the practical implementation of this material is constrained by its susceptibility to environmental degradation under prolonged exposure to moisture, oxygen, heat, and light irradiation. In this study, we presented an innovative elemental aluminum reduction-oxidation doping approach through solid-phase processing, which enabled the successful synthesis of aluminum-doped cesium tungsten bronze (Al-Cs_0.32WO₃) nanomaterials with markedly enhanced environmental stability. The aluminum doping strategy not only suppressed grain growth, reducing the average particle size from 176 nm to below 81 nm, but also improved moisture-heat resistance. Systematic investigation revealed that increasing Al doping concentration induced a heterogeneous interfacial effect at grain boundaries, effectively inhibiting crystallite growth. A polyvinyl butyral (PVB)-based composite film incorporating 0.5%Al-Cs_0.32WO₃ demonstrated exceptional optical performance, achieving 71.6% visible light transmittance at 550 nm, 92.8% NIR shielding efficiency at 950 nm and 99.2% UV blocking at 320 nm. More importantly, accelerated aging tests (85 ℃/85% RH for 60 days) revealed that the 0.5%Al-Cs_0.32WO₃ sample exhibited superior stability, with only a 2.3% reduction in NIR shielding performance, compared to the 4.0% degradation observed in undoped Cs_0.32WO₃. This work provides critical technical insights for the industrial application of Cs_0.32WO₃ in energy-efficient building materials, addressing the longstanding stability challenges in practical implementations.

Key words： cesium tungsten bronze aluminum doping solid-phase method transparent thermal insulation hygrothermal stability

Published: 25 June 2026 Online: 2026-07-08

CLC number:

TB34

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	Articles by authors
	ZHANG Jingwei
	CAO Zhao
	JI Xiaoguang
	GUO Jianhui
	LIU Bo
	LI Wenjing
	GONG Chunhong

Cite this article:

ZHANG Jingwei,CAO Zhao,JI Xiaoguang, et al. Study on the Hygrothermal Stability and Transparent Thermal Insulation Properties of Aluminum-doped Cesium Tungsten Bronze[J]. Materials Reports, 2026, 40(12): 25080215-7.

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https://www.mater-rep.com/EN/10.11896/cldb.25080215 OR https://www.mater-rep.com/EN/Y2026/V40/I12/25080215

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