amorphous vs. silicon steel materials

Compared Amorphous Materials And Silicon Steel Materials In Electric Motor Lamination Manufacturing

Electric motor lamination manufacturing is a critical process influencing the efficiency and performance of electric motors. Compared amorphous and silicon steel materials in electric motor laminations manufacturing process plays a pivotal role.

In this blog post, we’ll delve into the characteristics, advantages, and applications of both materials, providing valuable insights for those seeking a deeper understanding of motor laminations.

Electric Motor Lamination Manufacturing

Motor rotor and stator lamination stacks manufacturing is a crucial process in the production of electric motors, influencing their efficiency and performance. This intricate procedure involves stacking thin laminations or sheets of materials, typically electrical steel or metal alloys, to form the core of the motor. 

The core is an essential component that determines the motor’s magnetic properties, core losses, and overall energy efficiency. The selection of lamination materials is a critical decision, impacting factors such as magnetic permeability and energy consumption.

Engineers carefully consider various materials, including amorphous alloys and silicon steel, to achieve the desired balance between cost, performance, and sustainability in the production of electric motors.

lamination stacks bonding and stacking

Amorphous Materials

Amorphous materials, characterized by a disordered atomic structure, play a pivotal role in advanced engineering applications, particularly in electric motor lamination manufacturing. These metals offer very high permeability, a square hysteresis loop, and an oxide layer on the surface that provides electrical insulation for low eddy current losses.

With their random atomic arrangement, amorphous metal alloy materials minimize core losses, leading to improved energy efficiency in electric motors. This makes them a preferred choice in applications where reduced energy loss consumption and sustainability are paramount.

Silicon Steel Materials

Silicon steels are ferritic alloys of silicon iron that have magnetic properties which make them useful in motors, generators, and transformers. The silicon additions improve magnetic softness and increase electrical resistivity.

Silicon steel comes in two main types: non-oriented (NO) and grain-oriented (GO). Non-oriented silicon steel does not require grain orientation and exhibits low coercivity along with a hysteresis curve shape that reduces hysteresis loss in rotating machinery. It is versatile and commonly used in motors with complex magnetic fields. 

In contrast, grain-oriented silicon steel is specifically engineered for applications where magnetic flux is predominantly in one direction, enhancing efficiency.

Silicon steel’s magnetic properties minimize core losses, making it a preferred choice for electric motors. Its widespread use underscores its importance in achieving optimal performance, energy efficiency, and cost-effectiveness in electric motor applications.

motor lamination material selection

Comparison between Amorphous Materials and Silicon Steel Materials

Magnetic Properties

Amorphous magnetic materials, with their disordered structure, exhibit superior magnetic properties compared to silicon steel. The random arrangement of atoms in amorphous materials contributes to higher magnetic permeability, enhancing the overall efficiency of electric motors.

Core Losses and Energy Efficiency

One of the key considerations in motor lamination materials is core losses, as they impact the energy efficiency of electric motors. Amorphous materials can reduce motor core losses by 80%-93%, and outperform silicon steel in this aspect.  This translates to reduced energy consumption and improved sustainability.

compared amorphous and silicon steel materials iron core loss

Cost Considerations

While amorphous materials offer enhanced performance, they may come at a higher cost compared to silicon steel. The cost of amorphous metal materials is usually 2-3 times that of silicon steel materials. Customers need to weigh the upfront costs against the long-term benefits in terms of energy savings and overall motor efficiency.

Environmental Impact and Sustainability

As sustainability becomes a focal point in manufacturing, the environmental impact of materials is a crucial consideration. Amorphous materials, with their energy-efficient properties, contribute to a more sustainable approach to electric motor manufacturing compared to traditional silicon steel.

Challenges With Amorphous Metals

While amorphous metals offer remarkable magnetic properties for electric motor laminations, their application poses notable challenges. The extreme thickness (25 microns) and high hardness make processing into traditional motor structures difficult.

Stacking layers of amorphous metal ribbons presents challenges such as potential shorts between laminations. Various methods, including cutting, stacking, winding coils, and waterjet cutting, have been explored to construct motors with amorphous materials.

Waterjet cutting of wound conical forms shows promise in overcoming the challenges associated with handling thin and hard amorphous metals, offering a potential solution for more efficient axial motor stator manufacturing processes in the future.

Future Trends in Electric Motor Lamination Materials

The future of electric motor lamination materials is poised for exciting advancements, particularly in the development of enhanced formulations for amorphous metals. Researchers are focused on achieving higher saturation flux density while simultaneously minimizing core losses.

Innovations in manufacturing technologies, such as direct shape helical casting and roll-to-roll shaping, hold promise for improving the production efficiency of amorphous metals in electric motor laminations. Despite these strides, challenges persist in manufacturing processes and market adoption, limiting widespread commercial use.

The industry’s goal is to overcome these challenges, ultimately delivering cost-effective, reliable, and highly efficient motors using advanced amorphous metal laminations.

Additionally, ongoing developments in nanotechnology and material science are likely to influence the evolution of electric motor lamination materials, paving the way for lighter, more durable, and energy-efficient solutions.

Lamnow Advanced Amorphous Motor Laminations Capabilities

lamnow amorphous technology

Lamnow pioneers advanced amorphous motor lamination technology, featuring a cutting-edge production line. Specializing in amorphous-driven motors, motor control systems, and high-speed amorphous motors, We focus on delivering compact, high-performance, and energy-efficient solutions.

With commitment to innovation is reflected in products designed for medical, military, and various applications. Our technology stands out for its superior attributes, including higher efficiency, power density, permeability, and frequency operation, showcasing our dedication to providing state-of-the-art solutions in the realm of amorphous motor laminations.


In conclusion, electric motor core materials are the materials used to create the electromagnetic core of an electric motor, which is responsible for converting electrical energy into mechanical energy.

Amorphous materials showcase superior magnetic properties and energy efficiency, making them ideal for applications where reduced core losses are paramount. However, the higher cost and challenges in manufacturing processes must be considered.

On the other hand, silicon steel materials, available in non-oriented and grain-oriented types, offer cost-effectiveness and versatility.

The decision ultimately hinges on specific application requirements, emphasizing the need for manufacturers to weigh performance, cost, and sustainability factors to make informed choices in electric motor manufacturing.


What are the key differences between amorphous materials and silicon steel materials in electric motor lamination manufacturing?

The key differences lie in their atomic structures and magnetic properties. Amorphous materials have a disordered atomic structure, providing higher magnetic permeability and lower core losses, enhancing motor efficiency. In contrast, silicon steel materials, with a crystalline structure, offer cost-effectiveness and versatility but may have higher core losses compared to amorphous materials.

Which materials are more cost-effective for electric motor laminations?

The cost-effectiveness depends on factors such as energy efficiency goals and upfront costs. While silicon steel is traditionally more affordable, amorphous materials may offer long-term energy savings.

How do core losses impact the overall efficiency of electric motors?

Core losses result in energy dissipation in the form of heat, affecting the overall efficiency of electric motors. Materials with lower core losses, such as amorphous materials, contribute to higher efficiency.

How can you decide between amorphous and silicon steel materials based on specific motor performance requirements and cost considerations?

The decision between amorphous and silicon steel materials depends on specific motor performance needs and cost considerations. Choose amorphous materials for superior efficiency and lower core losses, ideal for high-performance applications. Opt for silicon steel when cost-effectiveness and versatility are critical, especially in applications with complex magnetic fields.

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