Boron Nitride Particles Bent Shape Thermal Conductivity
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Solution Overview
Problem
Boron nitride particles with a nearly spherical shape do not adequately contact each other in heat dissipation materials, limiting their thermal conductivity performance.
Innovation Solution
Boron nitride particles with a bent shape, characterized by a bending index of 0.2 or more, are used, which allows for better contact and formation of three-dimensional heat transfer paths when mixed with a resin, enhancing thermal conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If nearly spherical boron nitride particles are used, then the anisotropy of thermal conductivity is suppressed, but the particle contact in heat dissipation materials is insufficient
Solution Approach 1:
The invention applies spheroidality by forming boron nitride particles with a curved bent shape rather than straight or perfectly spherical forms. This curvature enables the particles to nestle together more effectively in three-dimensional space, improving contact while suppressing thermal conductivity anisotropy through the rounded geometry
Solution Approach 2:
The invention introduces asymmetry by creating bent-shaped particles with specific curvature ratios (L2/L1 ≥ 0.2) rather than symmetric spherical or linear forms. This asymmetric bending allows particles to interlock and contact more effectively in multiple directions, resolving the contact insufficiency problem while maintaining isotropic thermal properties
2Reliability
If bent-shaped boron nitride particles with high curvature are used, then particle contact is improved, but manufacturing complexity increases
Solution Approach 1:
The invention controls particle shape by adjusting specific parameters during formation, including the curvature ratio (L2/L1 ≥ 0.2), particle size (50-500 μm), and bending degree. By defining these quantitative parameters, the complex bent shape can be systematically controlled and reproduced in manufacturing
Solution Approach 2:
The invention performs preliminary shaping of boron nitride particles into bent configurations before they are incorporated into heat dissipation materials. This pre-forming process ensures the particles have the optimal bent geometry for contact enhancement, simplifying the overall manufacturing process by avoiding complex shaping steps later
Data Source
AI summary
A boron nitride particle having a bent shape. A resin composition containing the boron nitride particle and a resin. A method for producing a resin composition including a step of preparing the boron nitride particle and a step of mixing the boron nitride particle with a resin.