Co-Shrinking Syntactic Insulator for Stable High-Temperature Insulation
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Solution Overview
Problem
Current high temperature structural insulators face limitations in temperature and strength, thermal shock resistance, and dimensional stability, particularly in aerospace and metal processing applications, where existing materials exhibit poor thermal insulation and high density.
Innovation Solution
Development of structural, thermally-insulating composite materials incorporating hollow and/or shrinkable fillers within a preceramic polymer matrix, which co-shrink during processing to reduce stress and create pores, thereby lowering thermal conductivity and maintaining strength in high-stress environments up to 1600°C.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If hollow and shrinkable fillers are used to reduce thermal conductivity, then thermal insulation performance is improved, but residual stresses and dimensional instability occur during high temperature processing
Solution Approach 1:
The patent applies parameter changes by matching the shrinkage characteristics of hollow fillers with the matrix material during high temperature processing. The filler shrinkage rate is specifically controlled to correspond with matrix shrinkage, transforming the physical parameters of the composite material to achieve both low thermal conductivity and dimensional stability simultaneously.
Solution Approach 2:
The patent uses composite materials by combining hollow/shrinkable fillers with a matrix material that has compatible shrinkage characteristics. This composite structure allows the filler to provide thermal insulation while the matched matrix prevents residual stress accumulation, resolving the contradiction between thermal performance and dimensional stability.
2Strength
If high density ceramic systems are used to improve strength and temperature resistance, then thermal insulation performance deteriorates due to high density
Solution Approach 1:
The patent applies local quality by creating a heterogeneous composite structure where hollow fillers are distributed within a matrix material. This local arrangement of low-density hollow structures within a strength-providing matrix achieves both high temperature strength and low thermal conductivity, avoiding the need for high-density ceramics.
Solution Approach 2:
The patent uses composite materials to combine the strength benefits of ceramic-like matrices with the low-density thermal insulation of hollow fillers. This composite approach achieves high temperature strength without the high density and poor insulation characteristics of monolithic ceramic systems.
3Loss of energy
If low density insulator systems are used to improve thermal insulation, then temperature and strength limits are reduced
Solution Approach 1:
The patent uses composite materials to combine low-density hollow fillers for thermal insulation with a high-temperature-resistant matrix material. This composite structure achieves low thermal conductivity while maintaining high temperature strength, overcoming the limitations of low-density insulator systems.
Solution Approach 2:
The patent applies parameter changes by controlling the shrinkage behavior of hollow fillers to match the matrix material during high temperature processing. This parameter matching allows the low-density structure to maintain dimensional stability and strength at high temperatures, rather than deforming or failing.
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 composite materials achieve low thermal conductivity and high strength, retaining structural integrity and reducing residual stresses, with the ability to withstand extreme temperatures and high-stress conditions while maintaining mechanical properties.
Implementation Method 1
The matrix and hollow fillers are engineered to have compatible shrinkage characteristics, allowing them to co-shrink during high temperature processing
Implementation Method 2
The present invention is in the technical field of structural, thermally-insulating composite materials at least partially derived from preceramic polymers and reactive materials
Data Source
AI summary
A thermally-insulating composite material with co-shrinkage in the form of an insulating material formed by the inclusion of microballoons in a matrix material such that the microballoons and the matrix material exhibit co-shrinkage upon processing. The thermally-insulating composite material can be formed by a variety of microballoon-matrix material combinations such as polymer microballoons in a preceramic matrix material. The matrix materials generally contain fine rigid fillers.