Fire Protection Glass Coating Prevents Ion Diffusion
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Solution Overview
Problem
Fire retardants used in fire protection glass can attack the glass surface, leading to turbidity and loss of transparency during manufacturing or over time, impairing the optical appearance.
Innovation Solution
A transparent fire protection element with a haze-reducing protective coating on the surface facing the fire retardant, particularly containing silicon oxide, which absorbs and stores alkali metal ions like sodium, preventing their diffusion and subsequent clouding. The coating is applied using a physical deposition process, ensuring uniformity and optimal thickness (20 nm to 100 nm) to prevent ion diffusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fire protection agent is applied to the glass surface, then fire resistance is improved, but the glass surface becomes cloudy and transparency is lost
Solution Approach 1:
A protective coating layer is introduced as an intermediary between the glass pane and the fire protection agent. This coating prevents direct contact and chemical interaction between the fire protection agent and the glass surface, thereby preventing clouding while maintaining fire resistance. The coating acts as a barrier that allows the fire protection function to be maintained without the harmful side effect of surface degradation.
2Device complexity
If the fire protection agent is applied directly to the glass, then the structure is simplified, but ion diffusion causes clouding
Solution Approach 1:
The protective coating serves as a thin intermediary layer that adds minimal structural complexity while effectively preventing ion diffusion. The coating is applied as a separate layer between the glass and fire protection agent, creating a simple barrier structure that stops alkali metal ions from migrating into the fire protection agent and causing clouding.
3Illumination intensity
If a protective coating is applied to prevent ion diffusion, then transparency is maintained, but the device complexity increases
Solution Approach 1:
The protective coating is implemented as a thin film layer on the glass surface. This thin film approach maintains transparency while providing the necessary barrier function. The coating is applied as a continuous, uniform layer that is thin enough to be transparent but sufficient to prevent ion diffusion, thus balancing the transparency requirement with minimal added complexity.
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 solution effectively reduces or eliminates ion diffusion, maintaining the transparency of fire protection glass throughout its production and service life, preventing clouding and ensuring the glass remains clear.
Implementation Method 1
The protective coating particularly advantageously contains silicon oxide. The silicon oxide absorbs the disruptive alkali ions and stores them in its crystal structure.
Data Source
Figure 1~2
Figure 3
AI summary
The fire-protection element (10) according to the invention comprises at least one transparent carrier element (11) and a fire-protection material (13), which is arranged on at least one surface (14) of the carrier element (11). The surface (14) of the carrier element (11), this surface being directed toward the fire-protection material (13), has a fogging-reducing protective coating (12). This protective coating (12) prevents alkali ions, in particular sodium ions, in particular from diffusing in the direction of the fire-protection material (13) from the carrier element (11), which would result in the fire-protection element (10) fogging.