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170 W/m.k Gray ALN Ceramic Aluminum Nitride Substrate


the production process of aluminum nitride substrates is a complex and precise operation that involves multiple steps and stringent quality control measures to produce high-quality substrates for various electronic and thermal management applications.

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170 W/m.k Gray ALN Ceramic Aluminum Nitride Substrate

The production process of aluminum nitride substrate involves several key steps:

1. Raw material preparation: The first step in the production process is the preparation of raw materials. Aluminum nitride powder is typically synthesized from high-purity aluminum oxide and carbon powder in a nitrogen-rich atmosphere. The raw materials are carefully weighed and mixed according to a specific ratio before being loaded into a reaction vessel.

2. Synthesis of aluminum nitride powder: The next step involves the synthesis of aluminum nitride powder through a high-temperature reaction process. The reaction vessel containing the raw materials is heated to temperatures exceeding 1500°C, causing a chemical reaction to take place and form aluminum nitride powder. This powder is then cooled and collected for further processing.

3. Powder processing: The aluminum nitride powder is then subjected to various processing techniques to improve its properties and make it suitable for use as a substrate material. This may involve processes such as milling, sieving, and drying to achieve the desired particle size distribution and purity levels.

4. Substrate shaping: The processed aluminum nitride powder is then formed into a green substrate through a shaping process such as dry pressing, isostatic pressing, or tape casting. This step involves compacting the powder into a specific shape and size using a mold or die, followed by sintering to remove any residual organic binders and consolidate the substrate.

5. Sintering: The green substrate is then sintered in a high-temperature furnace to achieve full densification and bonding between the aluminum nitride particles. The sintering process typically involves heating the substrate to temperatures exceeding 1800°C in a controlled atmosphere to promote grain growth and eliminate any remaining porosity.

6. Machining and finishing: Once the substrate has been sintered, it undergoes additional processing steps such as machining, polishing, and surface treatment to achieve the final dimensions, flatness, and surface quality required for specific applications. This may involve processes such as lapping, grinding, and chemical etching to achieve the desired surface finish.

7. Quality control: Throughout the production process, rigorous quality control measures are implemented to ensure the final aluminum nitride substrates meet the required specifications and performance standards. This may involve testing for properties such as thermal conductivity, dielectric strength, and surface roughness, as well as visual inspection for defects or imperfections.

High Temperature Resistance

 

Performance for Industrial Ceramic    

 

 

Alumina Nitride (AlN)

Characteristics

Item

AlN180

AlN200

AlN220

Unit

Mechanical Characteristics

Colour

Gray

Gray

Beige

 

Density

3.3

3.3

3.28

g/cm3

Flexural Strength

≥350

≥350

≥350

MPa

Compressive Strength

2500

2500

-

MPa

Elastic Modulus

320

320

320

GPa

Vickers Hardness (Load 500g)

10

9.5

9

HV0.5

Thermal Characteristics

Coefficient of Line Thermal Expansion

4.8

4.6

4.5

10-6K-1

Thermal Conductivity(20℃)

180

200

220

W/m·K

Electrical Characteristics

Volume Resistance at 20°C

>1014

>1014

>1013

cm

Dielectric Strength

≥15

≥15

≥15

KV/mm

Dielectric Constant (1MHz)

9

8.8

8.6

εr

Loss Tangent

5

5

3

10-4

    

,_04

 

FAQ

Why us?
* Professional manufacturer since 1997.
* Strict quality control on production process and tolerance.
* Free samples available
* Customized production based on your drawing or specification
* On-time delivery and reliable support and service
* Inventory available for quick shipment
* We keep confidentiality of all the drawings and business information between us.
Are you a trading company or a manufacturer?
* We are a manufaturer. 
Can you provide the free samples?
* Yes,we can offer free sample if we have it in stock,but the courier fee is to be collected.
Do you accept customized production based our specification?
* Yes,we offer OEM and ODM service. Just send us your drawing if you have it. If you don’t have a drawing, just tell us your idea, we will work out the drawing for you.

What's the delivery time?
* 7 working days for standard products 30 days for customized products. 
What is the MOQ?
* No limit to the quantity. We can offer the best proposal and solutions according to your condition.
What is the payment terms you accept?
* T/T,LC,Western Union,moneygram are acceptable.
How to deal with the faulty?
* Firstly, Our product are produced in strict quality control system and the defective rate will be less than 2%.
If there are problems with the product, we will provide free replacement.

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