Boron Nitride Particles for Thermal Conductivity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional methods for producing boron nitride particles are limited in size and aspect ratio, which restricts the enhancement of thermal conductivity in heat dissipation materials.
Innovation Solution
A method involving a mixture of boron carbide and boric acid in a carbon material container, subjected to heating and pressurization in a nitrogen atmosphere, to produce boron nitride particles with increased size and aspect ratio, enabling the creation of particles with a maximum length of 80 μm or longer and an aspect ratio of 1.5 or more.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If conventional production methods are used, then boron nitride particles can be produced, but the particle size and aspect ratio are limited
Solution Approach 1:
The patent changes the production parameters by using a carbon material container and base material, applying heating and pressurization (0.3 MPa or higher) in a nitrogen atmosphere. This parameter change enables the production of boron nitride particles with maximum length of 80 μm or longer and aspect ratio of 1.5 or more, overcoming the size and aspect ratio limitations of conventional methods
Solution Approach 2:
The patent introduces a carbon material container and carbon material base material as intermediaries in the production process. The carbon materials facilitate the formation of large-sized and high aspect ratio boron nitride particles during heating and pressurization, acting as a medium that enables the desired particle morphology without being consumed in the reaction
2Reliability
If boron nitride particle size is increased, then thermal conductivity improves, but manufacturing difficulty increases
Solution Approach 1:
By changing the production parameters to include pressurization (0.3 MPa or higher) and using carbon material containers and base materials, the patent successfully produces large-sized boron nitride particles (80 μm or longer) with high aspect ratios. These particles achieve superior thermal conductivity while being manufacturable through the modified process
3Reliability
If aspect ratio of boron nitride particles is increased, then directional thermal conductivity improves, but production complexity increases
Solution Approach 1:
The patent achieves high aspect ratio boron nitride particles (1.5 or more) by changing production parameters to include heating and pressurization in a nitrogen atmosphere using carbon materials. This produces particles suitable for directional heat dissipation applications without requiring complex production equipment or processes
Solution Approach 2:
The carbon material container and base material serve as intermediaries that facilitate the formation of high aspect ratio particles during the heating and pressurization process, enabling directional thermal conductivity improvement without adding significant production process 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 resulting boron nitride particles exhibit superior thermal conductivity, particularly in the longitudinal direction, making them suitable for advanced heat dissipation materials with improved performance and potential weight reduction through hollow structures.
Implementation Method 1
a method for producing a boron nitride particle, including a step of disposing a mixture and a base material in a container formed of a carbon material, in which the mixture includes boron carbide and boric acid, and the base material is formed of a carbon material and a step of generating a boron nitride particle on the base material by performing heating and pressurization with a nitrogen atmosphere formed in the container
Implementation Method 2
generating a boron nitride particle on the base material by performing heating and pressurization with a nitrogen atmosphere formed in the container
Data Source
AI summary
A method for producing a boron nitride particle, including a step of disposing a mixture and a base material in a container formed of a carbon material, in which the mixture includes boron carbide and boric acid, and the base material is formed of a carbon material and a step of generating a boron nitride particle on the base material by heating and pressurization with a nitrogen atmosphere formed in the container. A boron nitride particle having a maximum length of 80 μm or longer, and an aspect ratio of 1.5 or more.