Refractory Custom AlN Tubes Aluminum Nitride Ceramic Tubes

Overview of Aluminum Nitride Ceramic Tubes

Aluminum Nitride (AlN) ceramic tubes are specialized ceramic components that play a key role in a variety of high-performance applications using the unique properties of aluminum nitride.

Characteristics of Aluminum Nitride Ceramic Tubes

1. High thermal conductivity: One of the outstanding features of aluminum nitride ceramic tubes is their excellent thermal conductivity, which ranges from 170 to 220 W/m-K. This property makes them very effective in applications that require efficient heat dissipation.

2. Excellent electrical insulation properties: Despite their high thermal conductivity, aluminum nitride ceramic tubes maintain excellent electrical insulation properties, making them ideal for use in electronic packaging and semiconductor applications where dielectric strength is extremely demanding.

3. Low Coefficient of Thermal Expansion (CTE): Aluminum nitride has a relatively low CTE, very close to that of silicon (approximately 4.5-5.0 ppm/°C). This minimizes thermal mismatch stresses and improves the reliability of devices subject to temperature fluctuations.

4. Chemical stability: Aluminum nitride ceramic tubes have excellent chemical resistance, including resistance to molten metals, acids, and bases, ensuring durability even in corrosive environments.

5. Mechanical strength: Although a brittle material, AlN ceramic tubes have sufficient hardness and strength for many industrial applications, provided that they are handled with care to avoid impact or excessive stress.

• Density: The density of aluminum nitride is approximately 3.26 g/cm³, making aluminum nitride tubes lightweight compared to some other ceramics.

Specification of Aluminum Nitride Ceramic Tube:

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
Inner Diameter (ID)	Customizable; typically ranges from a few millimeters to several centimeters
Outer Diameter (OD)	Customizable; typically ranges from a few millimeters to several centimeters
Length	Customizable; commonly available in lengths up to several meters
Purity	High purity options available (e.g., >99%)

Applications of Aluminum Nitride Ceramic Tube:

Electronics and semiconductors

1. Heat sinks and thermal management: Aluminum nitride tubes can be used as heat sinks or thermal management elements for power modules, LEDs, laser diodes, and RF devices. Their high thermal conductivity effectively dissipates heat away from sensitive components.

2. Insulation Tubing: Provides electrical insulation while allowing efficient heat transfer between components in electronic assemblies, ensuring reliable operation under thermal stress.

3. Substrates and Mounting Tubes: Serves as substrates or mounting tubes for semiconductor devices, ensuring proper thermal and electrical performance while minimizing thermal mismatch stress.

Automotive Industry

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

2. Ignition Systems:

– Used in ignition systems, which must withstand extreme temperatures and provide reliable electrical insulation.

3. High Temperature Seals: Serves as seals for high temperature automotive components, maintaining integrity under thermal stress.

Telecommunications

1. Microwave Devices: Used in microwave devices such as filters and resonators, as they have low dielectric losses and excellent thermal stability, which is critical to maintaining signal integrity at high frequencies.

2. Satellite communication systems: Used in satellite components because they are lightweight and can withstand extreme heat, helping to improve the reliability of space-based communication equipment.

Medical devices

1. Implants and diagnostic devices: Because AlN tubes are biocompatible and resistant to body fluids, they can be used in certain medical implants or diagnostic devices that require stable thermal and electrical properties.

2. Laser surgery tools: Surgical tools and equipment used in laser surgery benefit from their thermal stability and durability.

High temperature applications

1. Furnaces and kilns: Used as structural components, supports, or gaskets in furnaces and kilns, taking advantage of their thermal stability and chemical resistance to withstand high temperatures and corrosive environments.

2. Metallurgical processes: Used in processes involving molten metals because they resist chemical attack by molten materials.

Optoelectronics

1. Optical windows and lenses: Aluminum nitride tubes have transparency and thermal stability at specific wavelengths and can be used in optoelectronic devices such as optical windows and lenses.

Laser Technology

1. Laser Components: As substrates or components in laser technology, they can benefit from their thermal conductivity and mechanical strength.

Aerospace and Defense

1. Avionics and Spacecraft Components: For use in avionics and spacecraft components, reliable operation under extreme conditions is critical.

• Radar Systems: They can be used in radar systems due to 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 Aluminum Nitride Ceramic Tube:

Q1: What is Aluminum Nitride (AlN)?

A1: Aluminum Nitride is a ceramic material known for its excellent thermal conductivity, electrical insulation properties, and low coefficient of thermal expansion. It’s widely used in electronics, semiconductors, and other high-performance applications.

Q2: What is the typical thermal conductivity of AlN ceramic tubes? 

A2: The thermal conductivity of AlN ceramic tubes can range from 170 to 220 W/m·K, depending on purity and manufacturing processes.

Q3:How are AlN ceramic tubes 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 tubes be customized? 

A4: Yes, AlN ceramic tubes can often be customized in terms of inner diameter (ID), outer diameter (OD), length, and surface finish to meet specific application requirements.

Q5: Where are AlN ceramic tubes commonly used? 

A5: Common applications include heat sinks, insulating spacers, 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.