Ceramic Radiator Composition for Broad-Spectrum Heat Dissipation
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Solution Overview
Problem
Conventional ceramic heat sinks have insufficient emissivity in the wavelength range of 3 μm to 25 μm, leading to inadequate cooling performance for electrical and electronic equipment.
Innovation Solution
A radiator using a heat radiation ceramic material composed of a wurtzite-type metal oxide with trivalent and monovalent metal-doped metal oxides, enhancing emissivity across the 3 μm to 25 μm wavelength range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional ceramic heat sink is used, then the structure is simple and easy to manufacture, but the emissivity in the wavelength range of 3 μm to 25 μm is insufficient, leading to inadequate cooling performance
Solution Approach 1:
The patent uses a composite ceramic material consisting of multiple metal oxides (ZnO, Al2O3, SiO2, TiO2, Nb2O5, Ta2O5, MoO3, WO3, MnO2, Fe2O3, Co3O4, NiO, CuO) with different crystal structures and optical properties. This composite structure enables the material to achieve high emissivity across the broad wavelength range of 3 μm to 25 μm by combining the advantages of individual components, thereby improving cooling performance while maintaining manufacturability through conventional ceramic processing techniques
2Reliability
If a metal oxide coating is applied to increase emissivity, then heat radiation capability improves, but the complexity of the structure and manufacturing process increases
Solution Approach 1:
The patent achieves high emissivity by carefully controlling the compositional parameters and sintering conditions of the ceramic material. By adjusting the ratios of different metal oxides and controlling the sintering temperature and atmosphere, the material develops an optimal microstructure with numerous crystalline phases that provide high emissivity across the infrared spectrum. This approach integrates the emissivity-enhancing coating function directly into the bulk material properties, avoiding separate coating steps and reducing overall structural complexity
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 radiator achieves improved cooling performance by maintaining an average emissivity of 70% or higher, effectively dissipating heat in a broader infrared spectrum.
Implementation Method 1
ceramic heat sinks that utilize infrared heat radiation have gained attention
Implementation Method 2
a radiator proposed in Patent Literature 1 absorbs and radiates out heat generated by an electronic device
Data Source
AI summary
A radiator includes a heat radiation ceramic material. The heat radiation ceramic material includes a first metal oxide as a principal component, the first metal oxide being a metal oxide having a wurtzite crystal structure; and a second metal oxide as a metal oxide having an average emissivity higher than or equal to 70% in a wavelength range of 3 μm to 25 μm inclusive. At least one of a trivalent metal-doped metal oxide where some metal atoms of the first metal oxide are substituted with trivalent metal atoms and a monovalent metal-doped metal oxide where some metal atoms of the first metal oxide are substituted with monovalent metal atoms is included as the second metal oxide.