Passive Components Blog
No Result
View All Result
  • Home
  • NewsFilter
    • All
    • Aerospace & Defence
    • Antenna
    • Applications
    • Automotive
    • Capacitors
    • Circuit Protection Devices
    • electro-mechanical news
    • Filters
    • Fuses
    • Inductors
    • Industrial
    • Integrated Passives
    • inter-connect news
    • Market & Supply Chain
    • Market Insights
    • Medical
    • Modelling and Simulation
    • New Materials & Supply
    • New Technologies
    • Non-linear Passives
    • Oscillators
    • Passive Sensors News
    • Resistors
    • RF & Microwave
    • Telecommunication
    • Weekly Digest

    Paumanok Releases Capacitor Foils Market Report 2025-2030

    Modelithics Welcomes CapV as a Sponsoring MVP

    Wk 40 Electronics Supply Chain Digest

    Benefits of Tantalum Powder Stress–Strain Curve Evaluation vs Conventional Wet Test

    Electrolyte Selection and Performance in Supercapacitors

    Connector PCB Design Challenges

    Researchers Demonstrated High Energy Ceramic Capacitors Stable in Wide Temperature Range

    Stackpole Offers High Voltage Plate Resistors up to 40KV

    How to Manage Supercapacitors Leakage Current and Self Discharge 

    Trending Tags

    • Ripple Current
    • RF
    • Leakage Current
    • Tantalum vs Ceramic
    • Snubber
    • Low ESR
    • Feedthrough
    • Derating
    • Dielectric Constant
    • New Products
    • Market Reports
  • VideoFilter
    • All
    • Antenna videos
    • Capacitor videos
    • Circuit Protection Video
    • Filter videos
    • Fuse videos
    • Inductor videos
    • Inter-Connect Video
    • Non-linear passives videos
    • Oscillator videos
    • Passive sensors videos
    • Resistor videos

    Connector PCB Design Challenges

    Efficient Power Converters: Duty Cycle vs Conduction Losses

    Ripple Steering in Coupled Inductors: SEPIC Case

    SEPIC Converter with Coupled and Uncoupled Inductors

    Coupled Inductors in SEPIC versus Flyback Converters

    Non-Linear MLCC Class II Capacitor Measurements Challenges

    Percolation Phenomenon and Reliability of Molded Power Inductors in DC/DC converters

    Root Causes and Effects of DC Bias and AC in Ceramic Capacitors

    How to Calculate the Output Capacitor for a Switching Power Supply

    Trending Tags

    • Capacitors explained
    • Inductors explained
    • Resistors explained
    • Filters explained
    • Application Video Guidelines
    • EMC
    • New Products
    • Ripple Current
    • Simulation
    • Tantalum vs Ceramic
  • Knowledge Blog
  • Suppliers
    • Who is Who
  • Events
  • Home
  • NewsFilter
    • All
    • Aerospace & Defence
    • Antenna
    • Applications
    • Automotive
    • Capacitors
    • Circuit Protection Devices
    • electro-mechanical news
    • Filters
    • Fuses
    • Inductors
    • Industrial
    • Integrated Passives
    • inter-connect news
    • Market & Supply Chain
    • Market Insights
    • Medical
    • Modelling and Simulation
    • New Materials & Supply
    • New Technologies
    • Non-linear Passives
    • Oscillators
    • Passive Sensors News
    • Resistors
    • RF & Microwave
    • Telecommunication
    • Weekly Digest

    Paumanok Releases Capacitor Foils Market Report 2025-2030

    Modelithics Welcomes CapV as a Sponsoring MVP

    Wk 40 Electronics Supply Chain Digest

    Benefits of Tantalum Powder Stress–Strain Curve Evaluation vs Conventional Wet Test

    Electrolyte Selection and Performance in Supercapacitors

    Connector PCB Design Challenges

    Researchers Demonstrated High Energy Ceramic Capacitors Stable in Wide Temperature Range

    Stackpole Offers High Voltage Plate Resistors up to 40KV

    How to Manage Supercapacitors Leakage Current and Self Discharge 

    Trending Tags

    • Ripple Current
    • RF
    • Leakage Current
    • Tantalum vs Ceramic
    • Snubber
    • Low ESR
    • Feedthrough
    • Derating
    • Dielectric Constant
    • New Products
    • Market Reports
  • VideoFilter
    • All
    • Antenna videos
    • Capacitor videos
    • Circuit Protection Video
    • Filter videos
    • Fuse videos
    • Inductor videos
    • Inter-Connect Video
    • Non-linear passives videos
    • Oscillator videos
    • Passive sensors videos
    • Resistor videos

    Connector PCB Design Challenges

    Efficient Power Converters: Duty Cycle vs Conduction Losses

    Ripple Steering in Coupled Inductors: SEPIC Case

    SEPIC Converter with Coupled and Uncoupled Inductors

    Coupled Inductors in SEPIC versus Flyback Converters

    Non-Linear MLCC Class II Capacitor Measurements Challenges

    Percolation Phenomenon and Reliability of Molded Power Inductors in DC/DC converters

    Root Causes and Effects of DC Bias and AC in Ceramic Capacitors

    How to Calculate the Output Capacitor for a Switching Power Supply

    Trending Tags

    • Capacitors explained
    • Inductors explained
    • Resistors explained
    • Filters explained
    • Application Video Guidelines
    • EMC
    • New Products
    • Ripple Current
    • Simulation
    • Tantalum vs Ceramic
  • Knowledge Blog
  • Suppliers
    • Who is Who
  • Events
No Result
View All Result
Passive Components Blog
No Result
View All Result

Nanocrystalline Soft Magnetic Metal Core Materials Explained

18.12.2020
Reading Time: 3 mins read
A A

Nanocrystals are crystals measuring less than 100 nanometers in at least one dimension. The smallest fundamental component of a nanocrystal is called the crystallite, or grain. Materials that have nanocrystals distributed throughout, and have significantly different characteristics as a result, are called nanocrystalline materials. Semiconductor nanocrystals with dimensions smaller than 10 nm are also sometimes called quantum dots. 

Nanocrystalline materials have many unique and useful properties. The unique mechanical, chemical, electrical, and quantum properties of nanocrystalline materials have driven a great deal of technological advancement in recent decades, and appear poised to drive even more in the years to come.

RelatedPosts

Paumanok Releases Capacitor Foils Market Report 2025-2030

Modelithics Welcomes CapV as a Sponsoring MVP

Wk 40 Electronics Supply Chain Digest

What are metallic nanocrystals?

In magnetics, “soft” describes a magnetic material with a low coercivity, i.e., an alloy created by crystallizing an Fe-based amorphous soft magnetic alloy. In this material, nanocrystal grains are dispersed quite evenly throughout the amorphous (or non-crystalized) phase. This material is ferromagnetic at room temperature, and in conjunction with the nanocrystals, realizes a low saturation magnetostriction constant, making it a very magnetically soft material. 

This material was primarily used in choke coils and transformers for power electronics because of its excellent characteristics compared to conventional magnetic materials. Those excellent characteristics permit components constructed with it to be significantly reduced in size.

How are nanocrystals different?

Nanocrystalline soft magnetic cores are manufactured by casting the molten metal into a thin solid ribbon and then rapidly cooling it. A highly controlled annealing process is then employed to create a uniform and very fine nanocrystalline microstructure with grain sizes of ~10 nm. This process creates a high-performance EMI solution, but the thin metal ribbons wound together are easily damaged by shock or vibration.

Figure 1

To avoid damage, the core can be mounted in a core case, or even glued to the case, or the wound core can be impregnated with varnish to improve the vibration performance, to effectively protect the final product from vibration damage.

What are the advantages of nanocrystals?

Compared to ferrite cores, the impedance of nanocrystalline cores is extremely high and the effective frequency band is very wide. This allows components to be made smaller and saves engineering time that otherwise would be needed to design and test other EMI countermeasures. Nanocrystal cores are, therefore, ideal for designs with complex EMI noise scenarios – high energy noise and/or noise at multiple different frequencies. In simple scenarios, where the noise energy is small or localized at one frequency, inexpensive ferrite cores are usually sufficient.

The following table summarizes the benefits of nanocrystalline soft magnetic material.

What are the ideal applications of nanocrystals?

Ideal applications for nanocrystal ferromagnets include high current output inverter devices. At high currents, the winding diameter becomes thicker, which limits the number of turns, and high inductance cannot be obtained, resulting in insufficient attenuation on the low frequency side. Nanocrystalline materials are a much better choice for these applications. As a result, an increasing number of Tier 1 automotive suppliers are also using nanocrystal cores in automotive units that require EMI protection in the CISPR band.

However, since nanocrystal materials pass magnetic flux well, saturation due to common mode current is likely to occur. In such cases, a coil using a ferrite material such as 5HT or 7HT, which does not have a very high magnetic permeability and has a relatively high magnetic flux density will be effective.

Other applications that are ideal for nanocrystal materials include:

  • EMI filters / common mode chokes
  • Current sensors / magnetic sensors

Related

Source: Kemet Blog

Recent Posts

Benefits of Tantalum Powder Stress–Strain Curve Evaluation vs Conventional Wet Test

3.10.2025
16

Electrolyte Selection and Performance in Supercapacitors

3.10.2025
16

Connector PCB Design Challenges

3.10.2025
18

Researchers Demonstrated High Energy Ceramic Capacitors Stable in Wide Temperature Range

2.10.2025
23

How to Manage Supercapacitors Leakage Current and Self Discharge 

1.10.2025
37

Experimental Evaluation of Wear Failures in SMD Inductors

1.10.2025
36

Resonant Capacitors in High-Power Resonant Circuits

1.10.2025
36
a Schematic diagram of the BNT-based components constructed based on the entropy-increase strategy. b Digital photograph, cross-sectional SEM image, and EDS mappings of the MLCCs. c Unipolar P-E loops of MLCCs as a function of applied E. d Wrec and η of the MLCCs as a function of applied E. The comparison of (e) Wrec and η, (f) η and UF of the MLCCs with those of other recently reported state-of-the-art MLCCs. source: Nature Communications

Researchers Proposed Enhanced Energy Storage MLCC

1.10.2025
16

Improving SMPS Performance with Thermal Interface Material

30.9.2025
12

Polymer Tantalum Capacitors Beyond AEC-Q200 LEO Satellites

30.9.2025
52

Upcoming Events

Oct 8
11:00 - 12:00 CEST

PCB Online Shop – simply “Made in Germany” by Würth Elektronik

Oct 14
16:00 - 17:00 CEST

Smart Sensors, Smarter AI: Building Reliable Edge Systems

Oct 17
12:00 - 14:00 EDT

External Visual Inspection per MIL-STD-883 TM 2009

Oct 20
October 20 - October 23

Digital WE Days 2025 – Virtual Conference

Oct 21
October 21 @ 12:00 - October 23 @ 14:15 EDT

Space and Military Standards for Hybrids and RF Microwave Modules

View Calendar

Popular Posts

  • Buck Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • Boost Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • Flyback Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • LLC Resonant Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • SEPIC Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • What is a Dielectric Constant and DF of Plastic Materials?

    4 shares
    Share 4 Tweet 0
  • Ripple Current and its Effects on the Performance of Capacitors

    3 shares
    Share 3 Tweet 0
  • Dual Active Bridge (DAB) Topology Explained

    0 shares
    Share 0 Tweet 0
  • Flying Capacitors Explained

    0 shares
    Share 0 Tweet 0
  • MLCC and Ceramic Capacitors

    0 shares
    Share 0 Tweet 0

Newsletter Subscription

 

Passive Components Blog

© EPCI - Leading Passive Components Educational and Information Site

  • Home
  • Privacy Policy
  • EPCI Membership & Advertisement
  • About

No Result
View All Result
  • Home
  • Knowledge Blog
  • Premium Suppliers

© EPCI - Leading Passive Components Educational and Information Site

This website uses cookies. By continuing to use this website you are giving consent to cookies being used. Visit our Privacy and Cookie Policy.
Go to mobile version