Extreme Temperature Gasket Material Composition for High Heat Sealing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing gasket materials fail to maintain sealing properties at extreme temperatures due to organic material burn-off and the trade-off between filler and fiber content, leading to leak paths and reduced structural stability.
Innovation Solution
A solid oxide fuel cell and concentrating solar power apparatus using an extreme temperature gasket material composed of 75-90 wt% inorganic filler, 5-20 wt% inorganic fiber, and 1-5 wt% organic binder, with talc as a hydrophobic filler and silicic acid fiber, minimizing organic content to prevent burn-off and enhance sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gasket materials include relatively high amounts of organic material, then the gasket material provides good sealing properties at lower temperatures, but the organic material burns off at high temperatures and creates leak paths that undermine the sealing properties
Solution Approach 1:
The patent changes the chemical composition parameters by limiting organic material to less than 5 wt% and increasing inorganic filler to 75-90 wt%, transforming the material from organic-based to inorganic-based to achieve high-temperature stability while maintaining sealing properties
Solution Approach 2:
The patent creates a composite gasket material combining inorganic filler (75-90 wt%), inorganic fiber (5-20 wt%), and organic binder (1-5 wt%), where the inorganic components provide high-temperature stability and the minimal organic binder provides binding functionality without excessive burn-off
2Strength
If manufacturers sacrifice filler quantity in favor of higher quantities of fiber to provide added structural stability, then the gasket material gains structural stability, but the sealing properties suffer because fiber is not as good of a sealant as filler material
Solution Approach 1:
The patent optimizes the composition parameters by setting filler content at 75-90 wt% and fiber content at 5-20 wt%, reversing the conventional approach to achieve both structural stability and superior sealing properties through high filler content
Solution Approach 2:
The patent develops a composite formulation where inorganic filler serves dual purposes as both structural support and sealing agent, while inorganic fiber provides reinforcement, creating a synergistic material that outperforms conventional fiber-rich compositions
Data Source
AI summary
An extreme temperature gasket material capable of withstanding temperatures in excess of 850° F. is provided. The extreme temperature gasket generally includes an inorganic filler, an inorganic fiber, and an organic binder. In some embodiments, the inorganic filler is from 75 to 90 wt % of the gasket material and can include submicron-sized talc particles. The inorganic fiber can be from 5 to 20 wt % of the gasket material and can include silicic acid fiber. The binder can be a latex emulsion and can be present in the gasket material in the range of from 1 to 5 wt % of the gasket material. The gasket material also can include additives, such as flocculant and defoamer. In some embodiments, the amount of organic material present in the gasket material is limited to less than 5 wt % of the gasket material.