Composite Graphite Heat Insulating Material Thickness Conductivity
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Solution Overview
Problem
Conventional graphite-based heat-emitting materials exhibit insufficient thermal conductivity in the thickness direction due to their anisotropic nature, limiting their overall heat-emitting performance.
Innovation Solution
A composite graphite heat-emitting material is developed by mixing high-density expanded and compressed graphite particles with expanded graphite, where the high-density particles are compressed to a density of 0.1 to 2.2 g/cm3 and present in 5 to 50 wt% of the total weight, enhancing thermal conductivity in both the plane and thickness directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If compressed natural graphite is used as heat-emitting material, then thermal conductivity in the plane direction is high, but thermal conductivity in the thickness direction is insufficient
Solution Approach 1:
The patent creates a composite graphite material by combining expanded graphite (providing thickness-direction conductivity) with compressed graphite particles (providing plane-direction conductivity). This composite structure achieves high thermal conductivity in both directions, resolving the anisotropic limitation of conventional compressed graphite while maintaining overall heat-emitting performance
Solution Approach 2:
The patent applies different graphite forms to different spatial requirements: expanded graphite is used to enhance thermal conductivity in the thickness direction where it was previously insufficient, while compressed graphite particles maintain the high plane-direction conductivity. This localized optimization of material properties resolves the directional conductivity contradiction
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 material significantly improves heat-emitting properties by increasing thermal conductivity in the thickness direction, allowing for efficient heat dissipation from electronics, thereby enhancing the reliability and durability of electronic devices.
Implementation Method 1
the composite graphite heat emitting material... can surprisingly enhance thermal conductivity in the direction of thickness and eventually a high level of heat-emitting property
Data Source
AI summary
Disclosed are a composite graphite heat insulating material with improved thermal conductivity in the thickness direction and a method for manufacturing the same. The composite graphite heat insulating material according to the present invention comprises: an expanded graphite matrix which is compressed in the thickness direction; and high-density compressed and expanded graphite particles which are filled in the pores within the compressed and expanded graphite matrix and have a density of 0.1 g/cm3 or more.