Electrical Insulation AlN Aluminium Nitride Ceramic Plate

Overview of Aluminium Nitride Ceramic Plate

Aluminum Nitride (AlN) Ceramic Plates are advanced ceramic components that leverage the unique properties of aluminum nitride to serve critical functions in various high-performance applications. These plates are engineered to meet stringent requirements for thermal management, electrical insulation, and mechanical stability. Below is a comprehensive overview of AlN Ceramic Plates:

Properties Aluminium Nitride Ceramic Plate

1. High Thermal Conductivity:One of the most notable features of AlN ceramic plates is their exceptional thermal conductivity, which can range from 170 to 220 W/m·K. This makes them superior to many other ceramics for applications requiring efficient heat dissipation.

2. Excellent Electrical Insulation:Despite their high thermal conductivity, AlN plates maintain excellent electrical insulation properties, making them ideal for use in electronic packaging and semiconductor applications where dielectric strength is crucial.

3. Low Coefficient of Thermal Expansion (CTE):The CTE of aluminum nitride is relatively low and closely matches that of silicon (~4.5-5.0 ppm/°C). This minimizes thermal mismatch stresses when these materials are used together in electronic devices.

• Chemical Stability:AlN ceramic plates exhibit good resistance against chemical corrosion, including resistance to molten metals and many acids and alkalis, enhancing their durability in harsh environments.

5. Mechanical Strength:They possess sufficient hardness and strength for many industrial applications, although they are brittle and can fracture under impact or excessive stress.

6. Density:The density of AlN is approximately 3.26 g/cm³, contributing to its lightweight nature compared to some other ceramic materials.

7. Purity:High purity options are available, with purities often exceeding 99%, which can improve thermal and electrical properties.

Specification of Aluminium Nitride Ceramic Plate:

Property	Typical Specification
Material Composition	AlN (Aluminum Nitride)
Thermal Conductivity	170-220 W/m·K
Coefficient of Thermal Expansion	~4.5-5.0 ppm/°C (similar to silicon)
Dielectric Strength	>20 kV/mm
Dielectric Constant (1 MHz)	~8.4 – 9.6
Volume Resistivity	>10^14 Ω·cm at 25°C
Mechanical Strength (Bending)	~350-450 MPa
Hardness (Vickers)	~12-14 GPa
Density	~3.26 g/cm³
Porosity	<1%
Operating Temperature Range	-269°C to +1000°C
Chemical Stability	Excellent resistance to acids, alkalis, and molten metals
Surface Finish	Can be polished to optical quality or left with a machined finish
Dimensions	Customizable; typical thickness ranges from 0.5 mm to several millimeters, with various length and width options
Purity	High purity options available (e.g., >99%)

Applications of Aluminium Nitride Ceramic Plate

Electronics and Semiconductors

Heat Sinks: Used as heat sinks to efficiently dissipate heat away from sensitive electronic components.

Substrates: Serve as substrates for power modules, LEDs, laser diodes, RF devices, and microwave devices due to their excellent thermal conductivity and electrical insulation.

Insulating Plates: Provide electrical insulation while allowing efficient heat transfer between components in electronic assemblies.

Automotive Industry

Sensor Components: Protect sensors in harsh environments such as exhaust systems, fuel lines, and engine compartments. They can withstand high temperatures and corrosive conditions.

Ignition Systems: Utilized in ignition systems where they must endure extreme temperatures and provide reliable electrical insulation.

Telecommunications

Microwave Devices: Employed in microwave devices like filters and resonators due to their low dielectric loss and excellent thermal stability, crucial for maintaining signal integrity at high frequencies.

Satellite Communication Systems: Used in satellite components because of their lightweight nature and ability to handle thermal extremes.

Medical Devices

Implants and Diagnostic Equipment: Due to biocompatibility and resistance to bodily fluids, AlN plates can be found in certain medical implants or diagnostic equipment requiring stable thermal and electrical properties.

Laser Surgery Tools:Used in surgical tools and equipment for laser surgery, benefiting from their thermal stability and durability.

High-Temperature Applications

Furnaces and Kilns: Serve as structural components, supports, or spacers in furnaces and kilns, taking advantage of their thermal stability and chemical resistance to withstand high temperatures and corrosive atmospheres.

Metallurgical Processes: Used in processes involving molten metals due to their resistance to chemical attack by molten materials.

Optoelectronics

Optical Windows and Lenses: Benefiting from their transparency in certain wavelengths and thermal stability, AlN plates can be used in optoelectronic devices like optical windows and lenses.

Laser Technology

Laser Components: As substrates or components in laser technology, benefiting from their thermal conductivity and mechanical strength.

Aerospace and Defense

Avionics and Spacecraft Components:Utilized in avionics and spacecraft components where reliable operation under extreme conditions is critical.Radar Systems:Used in radar systems for their electromagnetic compatibility and thermal stability.

Company Profile

Advanced Ceramics founded on October 17, 2012, is a high-tech enterprise committed to the research and development, production, processing, sales and technical services of ceramic relative materials and products.. Since its establishment in 2012, the company has been committed to providing customers with the best products and services, and has become a leader in the industry through continuous technological innovation and strict quality management.

Our products includes but not limited to Aluminum Nitride Ceramic Products, Boron Carbide Ceramic Products, Boron Nitride Ceramic Products, Silicon Carbide Ceramic Products, Silicon Nitride Ceramic Products, Zirconium Dioxide Ceramic Products, Quartz Products, etc. Please feel free to contact us.(nanotrun@yahoo.com)

Payment Methods

T/T, Western Union, Paypal, Credit Card etc.

Shipment Methods

By air, by sea, by express, as customers request.

FAQs of Aluminium Nitride Ceramic Plate:

Q1: What is the typical thermal conductivity of AlN ceramic plates?

A1: The thermal conductivity of AlN ceramic plates can range from 170 to 220 W/m·K, depending on purity and manufacturing processes.

Q2: Where are AlN ceramic plates commonly used? 

A2: Common applications include heat sinks, substrates in power modules, LEDs, laser diodes, RF devices, automotive sensors, ignition systems, microwave devices, satellite communication systems, medical implants, diagnostic equipment, furnaces, kilns, optical windows, and laser technology components.

Q3: How are AlN ceramic plates manufactured? 

A3: Manufacturing involves several steps including powder synthesis, forming, sintering at high temperatures, and machining. The quality of the final product depends heavily on the purity of raw materials and control over processing parameters.

Q4: Can AlN ceramic plates withstand mechanical stress? 

A4: While AlN has sufficient hardness and strength for many applications, it is brittle and can fracture under impact or excessive stress. Proper design considerations are necessary to mitigate this risk.

Q5: Are AlN ceramic plates durable under harsh conditions? 

A5: Yes, AlN ceramic plates exhibit good resistance against chemical corrosion, including resistance to molten metals and many acids and alkalis, ensuring durability even in aggressive environments. However, they are brittle and require careful handling to avoid damage.