Solar Shielding Laminate With Tungsten Oxide for NIR Transparency
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Solution Overview
Problem
Existing laminated glass structures for solar radiation shielding face challenges in achieving sufficient solar radiation shielding performance while maintaining high visible light transmittance and weather resistance.
Innovation Solution
A laminated structure incorporating an intermediate layer with complex tungsten oxide particles, represented by the formula MxWyOz, where M is selected from specific elements and the ratio of x to y is adjusted to enhance near-infrared absorbability and weather resistance, is used between glass or plastic plates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional solar radiation shielding materials (tin oxide, indium oxide) are used in laminated glass, then solar radiation shielding performance is improved, but visible light transmittance deteriorates
Solution Approach 1:
The patent changes the chemical composition parameters by using complex tungsten oxide with specific M/W ratios (0.01-0.5) and controlled particle sizes (1-100 nm), achieving optimal balance between solar radiation shielding and visible light transmittance. This parameter optimization allows the material to selectively block near-infrared radiation while maintaining high visible light transmission.
Solution Approach 2:
The patent employs composite material strategy by combining tungsten oxide with various dopant elements (M elements from periodic table groups 1-18) to create complex tungsten oxide compounds. This composite approach enhances the solar radiation shielding capability through synergistic effects while preserving optical transparency, overcoming the limitations of simple metal oxides.
2Loss of energy
If solar radiation shielding layers are added to laminated glass, then solar radiation shielding performance is improved, but weather resistance deteriorates
Solution Approach 1:
The patent uses inorganic complex tungsten oxide particles instead of organic resin-based shielding layers. Inorganic materials provide superior weather resistance and long-term stability compared to organic materials that degrade under UV exposure and thermal cycling. This substitution eliminates weather resistance issues while maintaining solar radiation shielding performance.
Solution Approach 2:
The patent optimizes particle size parameters (1-100 nm range) and compositional parameters (M/W ratio of 0.01-0.5) to achieve both high solar radiation shielding efficiency and excellent weather resistance. The controlled particle size prevents aggregation and ensures uniform distribution, while the specific composition provides chemical stability against environmental degradation.
3Loss of energy
If minute particles of tungsten oxide are used with specific formulas, then near infrared absorbability is improved, but manufacturing complexity increases
Solution Approach 1:
The patent incorporates complex tungsten oxide particles directly into the intermediate layer material during the lamination manufacturing process, rather than applying separate shielding coatings. This preliminary incorporation simplifies manufacturing by integrating the solar radiation shielding function into the existing lamination workflow, avoiding additional complex coating or deposition steps.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The structure achieves near-infrared absorbability and visible light transmissivity while maintaining excellent weather resistance, even in high-temperature environments, by optimizing the composition and crystal structure of the complex tungsten oxide particles.
Implementation Method 1
the complex tungsten oxide particles have a local minimum value in a wavelength range of 800 nm or more and 2,100 nm or less, thereby having near infrared absorbability
Data Source
AI summary
Provided is a laminated structure for solar radiation shielding, including: two laminated plates selected from glass plates and plate-shaped plastics; and an intermediate layer provided between the two laminated plates, wherein one or more members selected from the laminated plates and the intermediate layer contain solar radiation shielding function material particles, and the solar radiation shielding function material particles contain particles of a complex tungsten oxide represented by General Formula: MxWyOz (where an element M is one or more elements selected from H, He, alkali metals, alkaline-earth metals, rare-earth elements, Mg, Zr, Cr, Mn, Fe, Ru, Co, Rh, Ir, Ni, Pd, Pt, Cu, Ag, Au, Zn, Cd, Al, Ga, In, Tl, Si, Ge, Sn, Pb, Sb, B, F, P, S, Se, Br, Te, Ti, Nb, V, Mo, Ta, Re, Be, Hf, Os, Bi, and I, 0.001≤x/y≤1, and 3.0<z/y).