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

#Amorphous and nanocrystalline magnetic cores - new breakthroughs in the field of magnetism

##Introduction

In the field of magnetism, magnetic cores are the core components of electronic devices, and their performance directly affects the efficiency and stability of the equipment. With the rapid development of technology, traditional magnetic core materials are no longer able to meet the growing demand for performance. Amorphous and nanocrystalline magnetic cores, as emerging magnetic materials, are becoming a research hotspot in the field of magnetism due to their unique physical properties and wide application prospects. This article will delve into the characteristics, preparation methods, technological innovations, and applications of amorphous and nanocrystalline magnetic cores in various fields, showcasing new breakthroughs in this area.

##The mystery of amorphous magnetic cores

###Definition and Characteristics

Amorphous magnetic core, also known as amorphous magnetic core or amorphous alloy magnetic core, is a magnetic core made of materials containing amorphous metal alloys. Its most prominent feature is the disorder of atomic arrangement, forming an amorphous structure. This structure endows amorphous magnetic cores with a series of unique properties:

-High saturation magnetic induction intensity: It can store more magnetic energy in a smaller volume and improve magnetic performance.

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

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

-High corrosion resistance: able to maintain stability for a long time in harsh environments.

###Application Fields

The excellent performance of amorphous magnetic cores makes them widely used in multiple 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 for communication devices.

-Automotive Industry: Used for 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: Their compact and lightweight nature makes them ideal for use in inductors and power management, enhancing the performance of portable devices.

##The rise of nanocrystalline magnetic cores

###Definition and Characteristics

Nanocrystalline magnetic core is a magnetic material composed of nanoscale grains, which exhibits outstanding performance in magnetic properties, magnetic permeability, and saturation magnetic induction intensity

-High saturation magnetic induction intensity: The grain boundaries and intragranular regions between nanocrystalline particles are small, effectively reducing magnetic domain walls and improving the magnetization ability of the material.

-* * High magnetic permeability * *: The nano grain size is small, the influence of grain boundaries is small, and it can operate in a higher frequency range.

-* * Low hysteresis loss * *: Small grain size, limited magnetic domain wall motion, reduces hysteresis loss, suitable for high-frequency applications.

###Application Fields

Due to its excellent high-frequency performance, nanocrystalline magnetic cores are widely used in:

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

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

-* * Electronic devices * *: such as power modules, speakers, etc., to enhance device performance.

##Technological Innovation and Breakthrough

In recent years, researchers have conducted extensive research on common key technical issues in the manufacturing of amorphous and nanocrystalline magnetic materials and their magnetic devices, such as uneven strip thickness, low high-frequency magnetic permeability, high losses, and poor reliability, and have made significant progress

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

-Continuous Manufacturing Technology: Invented continuous manufacturing technology and equipment for magnetic core dipping, drying, and precision dispensing, and produced highly reliable amorphous nanocrystalline magnetic core products for automotive use on a large scale.

-* * Powder Forming Technology * *: Developed efficient crushing powder technology for amorphous brittle bands, powder insulation interface design technology, and magnetic powder high-density forming technology based on powder microstructure control and temperature/hot pressing process, achieving iron-based amorphous