Silicon Nitride-Bonded Silicon Carbide Fireproof Board Glass Coating
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Fireproof boards made of silicon nitride-bonded silicon carbide face performance deterioration due to oxidation, and when heated, objects can adhere to the board, leading to surface peeling and reduced production yield.
Innovation Solution
A fireproof board design where the side surface is covered with a thicker glass layer to prevent oxidation, while the front and rear surfaces have a thinner or glass-free region to prevent object adhesion, with specific thickness ranges for the glass layers to balance corrosion resistance and adhesion prevention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If glass coating is formed on the entire surface of the fireproof board to prevent oxidation, then oxidation resistance is improved, but object adhesion increases causing surface peeling
Solution Approach 1:
The patent applies different glass coating thicknesses to different regions of the fireproof board. The side surfaces receive a thicker coating (5-100 μm) for oxidation protection, while the front and rear surfaces have a thinner coating (7 μm or less) to prevent object adhesion. This spatial differentiation of coating quality resolves the contradiction between oxidation resistance and adhesion prevention.
2Reliability
If thick glass coating is applied to prevent oxidation, then durability is improved, but manufacturing complexity increases due to precise thickness control requirements
Solution Approach 1:
The patent specifies precise thickness ranges for different regions: 5-100 μm for side surfaces and 7 μm or less for front/rear surfaces. This localized quality specification provides clear manufacturing guidelines that balance durability requirements with controllable manufacturing processes.
Solution Approach 2:
The patent changes the glass coating thickness parameter across different spatial locations on the fireproof board. By optimizing the thickness parameter locally rather than uniformly, the patent achieves both high durability and manufacturing feasibility.
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 suppresses oxidation and adhesion, enhancing the durability and production yield of the fireproof board by controlling glass thickness on the side and surface regions.
Implementation Method 1
the side surface is covered with glass of a first thickness... the side surface of the fireproof board can be suppressed from oxidation by heating
Implementation Method 2
The glass on the first region has the thickness that is less than that of the glass on the side surface... adhesion of the object to the fireproof board via the glass can be suppressed
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A fireproof board (10, 20) of silicon nitride-bonded silicon carbide is provided. The fireproof board (10, 20) has a side surface (10b, 20b), a front surface (10a, 20a), and a rear surface (10c, 20c). The side surface is covered with glass (6) of a first thickness (t2). At least one surface of the front surface and the rear surface has a first region (2). The first region is covered with glass of a second thickness that is less than the first thickness, or the first region is not covered with glass.