Silver-Coated Heating Glass With Zirconium Titanium Oxide Protection
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Solution Overview
Problem
Silver-based functional metal layers in glazings used in heating devices suffer from insufficient chemical resistance, thermal resistance, and mechanical strength, leading to defects and degradation under high-temperature heat treatment cycles and humid environments, which affects energy and optical performance.
Innovation Solution
Incorporating a zirconium titanium oxide layer as an upper protective layer in the stack of thin layers on transparent substrates, with a preferred Ti/Zr ratio and thickness, enhances resistance to corrosion and mechanical stress while maintaining optical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If silver-based functional metal layers are used in glazings, then the emissivity is reduced and energy performance is improved, but the chemical resistance and mechanical strength become insufficient
Solution Approach 1:
The patent applies composite materials by combining silver-based functional metal layers with protective layers made of zirconium oxide, silicon oxide, or zirconium titanium oxide. This composite structure maintains the low emissivity property of silver while adding chemical resistance and mechanical strength through the protective outer layers, resolving the contradiction between energy performance and reliability.
2Loss of energy
If silver-based functional metal layers are used in glazings, then the emissivity is reduced and energy performance is improved, but the mechanical strength becomes insufficient
Solution Approach 1:
The patent uses composite materials by integrating silver-based functional metal layers with protective layers of zirconium oxide, silicon oxide, or zirconium titanium oxide. The protective layers provide enhanced mechanical strength and scratch resistance while preserving the energy performance benefits of the silver layers through their transparent and durable composite structure.
3Temperature
If zirconium oxide protective layers are applied, then thermal resistance is improved, but resistance to corrosion in humid environment under hot conditions becomes insufficient
Solution Approach 1:
The patent applies parameter changes by modifying the protective layer composition from pure zirconium oxide to zirconium titanium oxide, adjusting the material parameters to achieve both high thermal resistance and superior corrosion resistance in humid hot environments. This compositional parameter change resolves the contradiction between thermal performance and corrosion resistance.
4Illumination intensity
If silver-based functional metal layers are used, then optical qualities are retained, but degradation under heat treatment cycles accelerates
Solution Approach 1:
The patent employs composite materials by combining silver-based functional metal layers with protective layers of zirconium oxide, silicon oxide, or zirconium titanium oxide. This composite structure preserves the optical qualities of silver while the protective layers shield against degradation during heat treatment cycles, extending the durability of the glazing system.
5Reliability
If protective layers are applied to improve resistance, then durability is improved, but the stack becomes more complex
Solution Approach 1:
The patent applies local quality by strategically positioning protective layers only where needed - specifically as outer protective layers facing the humid environment and heat treatment conditions. This localized approach provides necessary durability while minimizing the overall complexity of the stack structure by avoiding unnecessary layers in non-critical positions.
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 zirconium titanium oxide layer significantly improves the durability of silver-based stacks, preventing corrosion and mechanical damage, ensuring effective thermal, chemical, and mechanical resistance, even under harsh conditions, thus extending the lifespan and performance of glazings in heating devices.
Implementation Method 1
substrates coated with functional coatings which reflect infrared (IR) radiation
Implementation Method 2
coatings comprising silver-based functional metal layers (or silver layers) are the most effective in reducing the emissivity of glazings
Data Source
AI summary
A glazing can be used as a constituent element of a heating device or of a fireproof door. The glazing includes a transparent substrate coated with a stack of thin layers including at least one silver-based functional metal layer and an upper protective layer based on zirconium titanium oxide.