High Temperature Seal With Carbon Release Agent
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Solution Overview
Problem
Existing high-temperature sealing materials face challenges in balancing deformability to accommodate thermal expansion and contraction with the need for temperature resistance, fire resistance, and ease of replacement, as they often become brittle, adhere to components, and lose dimensional stability.
Innovation Solution
A high-temperature seal comprising a ceramic refractory sealing compound surrounded by a casing that decomposes at elevated temperatures, forming a carbon release agent to prevent adhesion and sintering, with a moisture-tight covering that allows for precise adjustment of deformability and geometry, using a plastic wrapping material and a carbon-containing adhesive for secure placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If fireproof ceramic mortars are used as sealing material, then fire resistance is improved, but the seal becomes brittle and adheres to components over time
Solution Approach 1:
The sealing compound combines ceramic refractory granules (providing fire resistance) with a binder system that maintains deformability at high temperatures. This composite structure allows the seal to withstand temperatures up to 1700°C while retaining sufficient flexibility to accommodate thermal expansion and contraction without becoming brittle.
Solution Approach 2:
The patent removes the problematic adhesion and sintering characteristics from traditional ceramic mortars by using a specific binder composition and adding a release agent layer. This extraction of harmful properties allows the sealing material to maintain its sealing function without adhering to adjacent components.
2Temperature
If traditional ceramic sealing materials are used, then temperature resistance is improved, but replacement becomes difficult due to adhesion and sintering
Solution Approach 1:
A release agent layer is introduced as an intermediary between the sealing compound and the adjacent refractory components. This intermediate layer prevents direct contact and bonding, allowing the seal to be easily removed and replaced without damaging the components or the seal itself, while the sealing compound maintains its high temperature resistance.
3Stability of the object's composition
If fibers with non-temperature-resistant binders are used, then deformability is improved, but dimensional stability is lost at high temperatures
Solution Approach 1:
The sealing compound uses a specialized binder composition that remains flexible at high temperatures rather than becoming brittle. The binder system, combined with ceramic refractory granules, creates a composite material that simultaneously achieves dimensional stability and deformability even at temperatures up to 1700°C, eliminating the need for temperature-sensitive organic binders.
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 seal maintains its sealing function across a wide temperature range without losing deformability, prevents unwanted adhesion, and allows for easy replacement by decomposing the covering to form a carbon residue that acts as a release agent, ensuring effective sealing in high-temperature applications like steel production.
Implementation Method 1
the casing decomposing at temperatures between >50 and forming a carbon-containing release agent
Implementation Method 2
The moisture can also be water of crystallization from the refractory components of the mass, which is released under heat.
Data Source
Figure 1a~1b
Figure 2
AI summary
The invention relates to a high-temperature seal with the following features: - a ceramic refractory sealant, - a coating surrounding the refractory sealant, - the coating decomposes at temperatures between >50 and <2000 degrees Celsius and - after decomposition, forms a carbon layer in the surface area of the ceramic sealant.