Composite Particle Binder Segmentation for Inductor Core Uniformity
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Solution Overview
Problem
The existing methods for manufacturing coil-type electronic components face challenges in dispersing binders evenly among metal magnetic particles, leading to characteristic variations and inconsistent performance after pressing.
Innovation Solution
The development of composite particles with larger magnetic particles (10 μm to 50 μm) coated with smaller binder particles (0.1 μm to 10 μm) and magnetic small particles, where the binder particles are strategically located between the small particles on the large particles, ensuring uniform binder distribution and attachment during the pressing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If binder is mixed with metal magnetic particles in conventional methods, then the mixture can be formed into a core, but the binder cannot be dispersed evenly among the particles leading to characteristic variation
Solution Approach 1:
The binder is segmented into fine particles (1 μm to 10 μm) and uniformly attached to each large magnetic particle (10 μm to 50 μm). This segmentation allows the binder to be distributed evenly among all particles rather than forming clumps, achieving uniform dispersion and reducing characteristic variation after pressing.
Solution Approach 2:
Fine binder particles are nested on the surface of large magnetic particles, forming a composite particle structure where smaller particles are attached to larger ones. This nested configuration ensures that every large particle has binder available for bonding during pressing, eliminating the characteristic variation problem.
2Quantity of substance
If pressing pressure is increased to improve density, then packing density improves, but characteristic variation increases due to uneven binder distribution
Solution Approach 1:
The binder particles are preliminarily attached to each large magnetic particle before the pressing process. This preliminary action ensures that binder is already in position to bond particles together during pressing, allowing high density to be achieved without characteristic variation caused by uneven binder distribution.
3Ease of manufacture
If conventional mixing methods are used, then manufacturing process is simple, but binder dispersal is insufficient leading to performance inconsistency
Solution Approach 1:
The particle size parameter of the binder is changed from conventional fine powder to controlled fine particles (1 μm to 10 μm). This parameter change enables the binder to attach uniformly to large particles while maintaining ease of manufacture through simple mixing and drying processes, achieving both process simplicity and performance consistency.
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
This approach results in reduced characteristic variations and enhanced consistency between pressing pressure and withstand voltage, allowing for stable adjustment of product characteristics and improved packing density, leading to higher withstand voltage performance.
Implementation Method 1
the binder particles are deposited and attached on the large particle
Data Source
AI summary
A composite particle includes a large particle and binder particles. The large particle has a particle size of 10 μm to 50 μm. The binder particles are attached on the large particle and each have a particle size smaller than that of the large particle.