In the field of magnetism, as the core component of electronic devices, the performance of magnetic core is directly related to the efficiency and stability of the equipment.

# Amorphous and nanocrystalline cores-a new breakthrough in the field of magnetism

 

## Introduction

 

In the field of magnetism, as the core component of electronic devices, the performance of magnetic core is directly related to the efficiency and stability of the equipment. With the rapid development of science and technology, traditional magnetic core materials have been difficult to meet the increasing performance requirements. Amorphous and nanocrystalline magnetic cores, as emerging magnetic materials, are becoming research hotspots in the field of magnetism due to their unique physical properties and broad application prospects. This paper will deeply discuss the characteristics, preparation methods, technological innovation and their applications in various fields of amorphous and nanocrystalline magnetic cores, and show new breakthroughs in this field.

 

## The mystery of amorphous magnetic core

 

### Definitions and Characteristics

 

An amorphous magnetic core, also known as an amorphous magnetic core or an amorphous alloy magnetic core, is a magnetic core made of a material containing an amorphous metal alloy. Its most notable feature is the disorder of atomic arrangement, forming an amorphous structure. This structure gives the amorphous core a unique set of properties:

 

-**High saturation magnetic induction**: Can store more magnetic energy in a smaller volume and improve magnetic performance.

-**Low hysteresis loss**: Small energy loss during magnetization and demagnetization, suitable for high-frequency applications.

-**Wide operating temperature range**: Maintain stable performance between -55 and 130 degrees Celsius.

-**High corrosion resistance**: Can remain stable for a long time in harsh environments.

 

### Application areas

 

The superiority of amorphous magnetic core can make it widely used in many fields:

 

-**Power Electronics**: As a magnetic core material for power transformers, inductors and inductive components, it improves the efficiency of power conversion and voltage conversion systems.

-**Telecommunications**: Used for coils and transformers in communication equipment to meet the needs of high-speed data transmission and power management of communication equipment.

-**Automotive industry**: Applied to power transmission and conversion in automotive electronic systems, such as engine control units, electric vehicle charging systems and electric power steering systems.

-**Wearable devices and mobile devices**: Its small and lightweight features are very suitable for inductors and power management to improve the performance of portable devices.

 

## The rise of nanocrystalline cores

 

### Definitions and Characteristics

 

Nanocrystalline magnetic core is a kind of magnetic material composed of nanoscale grains, which is outstanding in magnetic properties, magnetic conductivity and saturation magnetic induction intensity:

 

-**High saturation magnetic induction intensity**: The grain boundaries and intragranular regions between nanocrystalline particles are small, which effectively reduces the magnetic domain wall and improves the magnetization ability of the material.

-**High permeability**: The nano-grain size is small, the grain boundary influence is small, and it can work in a higher frequency range.

-**Low hysteresis loss**: The grain size is small, the magnetic domain wall movement is limited, and the hysteresis loss is reduced, suitable for high-frequency applications.

 

### Application areas

 

Because of its excellent high-frequency performance, nanocrystalline magnetic cores are widely used in:

 

-**Power Transformer**: Improve transformer efficiency and reduce volume and weight.

-**High-frequency inductors and sensors**: such as high-frequency filters, antennas, etc., to meet the needs of high-frequency applications.

-**Electronic equipment**: such as power modules, speakers, etc., to improve equipment performance.

 

## Technological innovation and breakthrough

 

In recent years, in view of the common key technical problems in the manufacture of amorphous and nanocrystalline magnetic materials and magnetic devices, such as uneven strip thickness, low high frequency permeability, high loss and poor reliability, scientific researchers have carried out a lot of research and made remarkable progress:

 

-**Heat treatment technology**: Developed in-situ magnetic anisotropy control technology based on tunnel-type high-efficiency one-step heat treatment equipment, and realized the industrialization of high-frequency high-permeability low-loss common-mode cores.

-**Continuous manufacturing technology**: Invented continuous manufacturing technology and equipment for core dipping and drying and precision dispensing, and produced high-reliability amorphous nanocrystalline magnetic core products for vehicles on a large scale.

-**Powder forming technology**: developed high-efficiency crushing and powder forming technology for amorphous brittle ribbons, powder insulation interface design technology and magnetic powder high-density forming technology based on powder microstructure control and temperature/hot pressing process, realizing iron-based amorphous