Porous Artificial Graphite Heat Sink via Fly Ash
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current heat-dissipating materials, such as traditional aluminum-based materials, have poor thermal conductivity and inefficient heat dissipation, which limits their effectiveness in electronic products, especially in slim and lightweight designs, and existing methods for producing graphite-based materials are complex and environmentally harmful.
Innovation Solution
A composition comprising 50-60% carbon-containing raw materials, 15-45% adhesive, and 5-25% dispersant, including fly ash, is used to create an artificial graphite element through a simplified process of mixing, baking, screening, molding, and graphitization, resulting in a porous material with enhanced thermal conductivity and planarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If traditional aluminous heat-dissipating materials are used, then thermal conductivity is improved, but heat-dissipating speed and overall heat dissipation effect deteriorate
Solution Approach 1:
The patent employs porous graphite material with controlled porosity (30-70%) to enhance heat dissipation performance. The porous structure increases surface area for convective heat transfer while maintaining thermal conductivity through the graphite matrix, resolving the contradiction between thermal conductivity and heat-dissipating speed
Solution Approach 2:
The patent creates a composite heat-dissipating material combining graphite particles with binding agents and porous structure. This composite approach integrates the high thermal conductivity of graphite with the heat dissipation benefits of porous structures, achieving both thermal conduction and convective heat dissipation simultaneously
2Productivity
If natural graphite is used as heat-dissipating material, then heat dissipation performance is improved, but cost and volume increase
Solution Approach 1:
The patent modifies the physical parameters of graphite by creating a porous structure with controlled porosity (30-70%) and particle size distribution. This parameter change enables the material to achieve heat dissipation performance comparable to natural graphite while reducing volume and cost through optimized structure rather than using pure natural graphite
Solution Approach 2:
The patent uses porous graphite composite material that achieves high heat dissipation performance through its porous structure, eliminating the need for bulky natural graphite. The porous structure provides high surface area to volume ratio, improving heat dissipation efficiency while reducing material quantity needed
3Ease of manufacture
If fly ash is used as carbon-containing raw material, then production cost is reduced, but production process complexity and environmental impact increase
Solution Approach 1:
The patent converts fly ash, which is typically considered waste material requiring disposal, into a valuable carbon-containing raw material for heat-dissipating components. By incorporating fly ash (5-50% by weight) into the graphite composite, the process transforms environmental waste into useful material, reducing both cost and environmental impact while simplifying the overall production process
4Manufacturing precision
If acid wash and grinding processes are applied to fly ash, then material purity is improved, but production time and environmental harm increase
Solution Approach 1:
The patent extracts and removes harmful components from fly ash through a simplified washing and screening process, obtaining purified carbon-containing material without requiring time-consuming acid wash and grinding operations. This extraction approach achieves sufficient purity (removing metal oxides and other contaminants) while significantly reducing production time and environmental harm
Solution Approach 2:
The patent employs a simplified, single-pass washing and screening process instead of multiple acid wash and grinding stages. This approach uses readily available water and simple mechanical screening to achieve the required material purity, eliminating the need for expensive and time-consuming acid handling and extensive grinding equipment
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 artificial graphite element demonstrates improved heat dissipation capabilities, simplifies production processes, reduces environmental impact, and can be directly applied to substrates, offering better performance and convenience for electronic products.
Implementation Method 1
The composition of the present invention contains an adhesive for the carbon-containing raw materials to be combined by closely stacking
Implementation Method 2
The composition of the present invention further contains a dispersant, which can effectively disperse the adhesive during the production of the artificial graphite element
Implementation Method 3
The artificial graphite element demonstrates improved heat dissipation capabilities
Data Source
AI summary
A composition for producing an artificial graphite element and a method for producing the same are provided. The composition includes a carbon-containing raw material such as fly ash, an adhesive, and a dispersant. The method for producing the artificial graphite element of the present invention includes the steps of mixing the above composition; baking the mixed composition to obtain powder having a plurality of particles; screening the powder to select particles having suitable particle diameters; molding the plurality of screened particles into an article; heating the article at 500 to 1000° C.; and graphitizing the heated article to obtain the artificial graphite element. The method of the present invention is simple and cost-effective. The artificial graphite element produced has a considerably large specific surface area due to its porous property, such that it is suitable for use as a heat-dissipating substrate.