Analysis of Three Main Forming Technologies of AlN Ceramics

How does a pile of loose ceramic powder transform into a final product with complex shapes and precise structures? All of this is thanks to a key manufacturing step: forming.

Today, we will clearly explain three main ceramic forming methods, exploring their working principles, advantages, disadvantages, and typical applications.

1.Dry Pressing

This is the simplest and most common method, very suitable for the mass production of simple-shaped parts.

Working Principle: Ceramic powder mixed with a small amount of binder is filled into a metal mold. Then, high pressure is applied via upper and lower punches to compact the powder into a dense "green body".

Advantages:

High Efficiency: High degree of automation and fast production speed.

Uniform Dimensions: Excellent product consistency.

Low Cost: Suitable for large-scale production.

Disadvantages:

Difficulty in manufacturing complex shapes (e.g., parts with side holes, thin walls).

High mold cost.

Possible uneven density in the green body.

Typical Applications: Ceramic seal rings, gaskets, substrates, bricks, tiles, etc.

2. Isostatic Pressing

Isostatic pressing was developed to solve the density uniformity issues of dry pressing. It uses a liquid or gas as the pressure-transmitting medium to compress the powder uniformly from all directions.

Working Principle: Ceramic powder is loaded into a flexible rubber or plastic mold, which is sealed and placed into a high-pressure vessel. Pressure is applied via a high-pressure pump, uniformly compacting the powder.

Advantages:

Uniform Density: The properties of the green body are consistent in all directions, which is key for manufacturing high-performance ceramics.

Good Shape Capability: Can produce parts with relatively complex shapes.

Disadvantages:

Large equipment investment.

Production cycle is longer than dry pressing.

Relatively low dimensional accuracy, often requiring subsequent machining.

Typical Applications: Large crucibles, high-voltage electrical insulators, spark plugs, high-performance structural components.

3. Injection Molding

If you need to manufacture ceramic parts with highly complex 3D geometries, similar to metal or plastic parts, injection molding makes this possible.

Working Principle: A large amount of ceramic powder is mixed with a thermoplastic binder and plasticized upon heating. It is then injected into a sealed mold cavity using a screw. After cooling and solidifying, it is demolded to obtain the "green body". Subsequent debinding processes are required to remove the binder before sintering.

Advantages:

Extremely high shape complexity and dimensional accuracy.

Automated production, high efficiency.

Good product consistency.

Disadvantages:

The debinding process is very slow and prone to causing defects.

High cost of molds and equipment.

High raw material cost.

Typical Applications: Micro ceramic gears, engine turbine rotors, medical surgical tools, electronic packaging components, etc.

About Xiamen Juci Technology Co., Ltd.

Xiamen Juci Technology Co., Ltd. is a high-tech enterprise specializing in the research, development, and production of high-performance Aluminum Nitride (AlN) ceramics. Mastering advanced ceramic forming and sintering technologies is crucial for manufacturing its premium AlN products. Aluminum Nitride ceramic is renowned for its high thermal conductivity, excellent electrical insulation, and low thermal expansion.

By leveraging sophisticated processes, including those mentioned above, Juci provides high-quality AlN substrates, structural parts, and heat sinks. These products are vital solutions for thermal management challenges in cutting-edge industries such as 5G communication, new energy vehicles, and high-power LED packaging.

Contact:
Xiamen Juci Technology Co., Ltd.

Phone: +86 592 7080230
Email: miki_huang@chinajuci.com
Website: www.jucialnglobal.com