Heat-Dissipating Ceramic Foam Using Carbonized Cellulose Particles
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Solution Overview
Problem
Conventional heat sinks, despite their good thermal conductivity, are heavy, costly, and limited by manufacturing constraints, and ceramic foams, despite their excellent mechanical and insulating properties, lack effective heat dissipation due to low thermal conductivity.
Innovation Solution
A heat-dissipating ceramic foam is produced by mixing carbonized cellulose particles, ceramic powders, silicate, and a foaming agent, with optional metal powders and activated carbon, to create a material with enhanced thermal conductivity and mechanical strength, utilizing coffee grounds as a carbonized cellulose-containing substance for improved heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If aluminum heat sink is used, then thermal conductivity is improved, but manufacturing cost and fabrication time increase
Solution Approach 1:
The patent creates a composite material by combining ceramic particles (providing structural stability and heat resistance) with carbonized cellulose particles (providing thermal conductivity). This composite approach allows the material to achieve heat dissipation performance comparable to aluminum while being manufactured through simpler casting processes, thereby resolving the contradiction between thermal conductivity and manufacturing ease.
Solution Approach 2:
The patent utilizes a porous foam structure where carbonized cellulose particles are distributed within a ceramic matrix. The porous structure increases surface area for heat dissipation while maintaining lightweight properties. This porous ceramic foam achieves effective heat dissipation through the high surface-area-to-volume ratio and the thermal conductivity provided by carbonized cellulose, avoiding the need for complex aluminum fin structures.
2Weight of moving object
If ceramic foam is used, then weight and mechanical strength are improved, but thermal conductivity deteriorates
Solution Approach 1:
The patent combines ceramic particles (providing weight, mechanical strength, and thermal stability) with carbonized cellulose particles (providing thermal conductivity). The carbonized cellulose acts as a thermal conductor within the ceramic matrix, enabling the lightweight foam structure to dissipate heat effectively. This composite approach resolves the contradiction by integrating materials with complementary properties.
Solution Approach 2:
The patent changes the thermal conductivity parameter of the ceramic foam by incorporating carbonized cellulose particles. The carbonized cellulose has higher thermal conductivity than the ceramic matrix, and its distribution within the foam structure creates thermal pathways that enhance overall heat dissipation while maintaining the lightweight foam architecture.
3Temperature
If aluminum heat sink is used, then thermal conductivity is improved, but weight increases
Solution Approach 1:
The patent creates a lightweight composite foam using ceramic particles and carbonized cellulose particles. The carbonized cellulose provides thermal conductivity comparable to aluminum, while the foam structure and ceramic matrix keep the weight low. This composite material achieves the thermal performance of aluminum without the weight penalty.
Solution Approach 2:
The porous foam structure inherently reduces weight compared to solid aluminum heat sinks. By distributing carbonized cellulose particles within the porous ceramic matrix, the patent maintains thermal conductivity through the particle network while the void spaces in the foam structure significantly reduce the overall density and weight of the heat dissipation component.
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 resulting ceramic foam exhibits superior heat dissipation capabilities with a larger surface area and compact pores, effectively managing heat generated by electronic devices while being lightweight and cost-effective.
Implementation Method 1
The heat sink may use a principle that when two substances contact each other, the substances distribute heat energy thereof to each other and eventually reach a thermal equilibrium... the heat sink may receive a strong heat of a heat source and lower the temperature of the heat source
Implementation Method 2
adding a foaming agent to the slurry to form foamed slurry... The foaming agent may be calcium carbonate, sodium bicarbonate or hydrogen peroxide. As long as the foaming agent is added in the slurry and forms pores in the slurry
Implementation Method 3
The foaming agent may be calcium carbonate, sodium bicarbonate or hydrogen peroxide. As long as the foaming agent is added in the slurry and forms pores in the slurry
Data Source
AI summary
The present disclosure provides a method for producing a heat-dissipating ceramic foam containing carbonized cellulose particles, the method including: mixing particles of carbonized cellulose or carbonized cellulose-containing substance, ceramic powders, silicate, and water to form slurry; adding a foaming agent to the slurry to form foamed slurry; and drying the foamed slurry.