Alumina Substrate
Alumina Substrate
Purity: 95%, 96%, 99%, 99.5%, 99.7%, 99.95%
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Alumina substrate data sheet
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Reference Code: |
HM1979 |
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Purity: |
95%, 96%, 99%, 99.5%, 99.7%, 99.95% |
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Dimensions: |
114.3×114.3 mm (4.5″×4.5″), 50.8×50.8 mm (2″×2″), or customized. |
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Thickness: |
0.25-2.0 mm, or customized |
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Color: |
White or ivory |
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Density: |
3.7-3.98 g/ cm3 |
Alumina substrate
Alumina substrate is primarily manufactured from high-purity aluminum oxide (Al2O3) and is widely used in electronic packaging, power modules, LED heat dissipation, and high-frequency circuits. It possesses excellent thermal conductivity, electrical insulation, and high-temperature resistance, making it the most commonly used substrate material for circuit boards. Advanced Ceramics Hub can provide customized solutions in terms of size, shape, and surface treatment to meet diverse industrial and research requirements.
Alumina substrate specifications
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Dimensions (length × width): |
114.3×114.3 mm (4.5″×4.5″), 50.8×50.8 mm (2″×2″), or customized. |
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Thickness: |
0.25-2.0 mm, or customized |
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Thermal conductivity: |
24 W/mK |
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Dielectric constant: |
9-10 (MHz) |
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Apparent density: |
3.7 g/ cm³ |
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Surface roughness: |
Ra: 0.03-0.7 μm |
Characteristics of the alumina substrate
Advanced Ceramic Hub strictly selects high-purity alumina materials and manufactures products under rigorous quality management, ensuring consistent quality and excellent properties.
- The material has a fine-grained structure with minimal porosity, resulting in excellent surface smoothness and flatness. It also exhibits excellent compatibility with both thick and thin-layer materials.
- The dimensional deviation in shape and thickness is minimal.
- Deformations, flexes and wrinkles are minimal.
- In high-temperature environments, its physical and chemical properties remain stable, with excellent resistance to thermal shock. It has a coefficient of thermal expansion close to that of silicon and exceptional thermal conductivity.
- Exceptional mechanical strength, with high-strength reinforced substrates available.
- Excellent chemical and oil resistance.
- Excellent electrical insulation properties, with a high dielectric breakdown voltage, surface resistance and volume resistance, as well as a low dielectric constant.
- There are also high-reflectivity substrates suitable for LED applications.
Alumina substrate. Available machining processes.
- Glaze treatment
- Laser processing
- Multilayer
- Metallization
- Print treatment
- Surface grinding
- Machining
Applications of alumina substrate
- Electronics : In integrated circuits, LED packaging and power modules.
- Automotive : As heat dissipating substrates in sensors and ignition systems.
- Medical devices : Support for biocompatible electronic components.
- Aerospace : Circuit support in high temperature environments.
- Telecommunications : High-frequency circuits and microwave devices.
Automotive industry
Electrical and Electronic Area
Medical Area
Telecommunications applications
Aerospace
Alumina Material Properties
Alumina Material Grades
Boron Nitride, with a glassy B2O3 binder, is highly machinable and suitable for most refractory applications. Grade A, used for over 50 years in legacy semiconductor and defense equipment, can produce components up to 410mm x 495mm x 245mm, but its hygroscopic binder needs moisture protection.
Grade A Composition:
- hBN>99.8%
Grade A Applications:
- High-temperature electrical insulators and vacuum furnace supports with electrical resistivity, strength, and thermal shock resistance.
- Crucibles and containers for high-purity molten metals.
- Insulators and fixtures for ion implantation systems requiring high temperature purity and electrical insulation.
- Radar components and antenna windows needing precise electrical and thermal properties.
- Setter plates for processing advanced materials requiring stable, inert surfaces.
- Nozzles for powdered metal spraying.
It’s a high-purity grade of Alumina (Aluminum Oxide) and one of the high-performance grades in this range of materials. It features a 99.7% purity Alumina base material that provides a superior set of mechanical and electrical properties while maintaining a reasonable cost. It is a very hard-wearing technical ceramic offering and is ideally suited to a wide range of industrial applications where mechanical and electrical performance is of the essence and the material needs to perform adequately in aggressive environments.
It can be machined in the “green state”- that is before sintering takes place, thus ensuring a large variety of shapes and sizes. It can also be diamond ground to tight tolerances in the fully sintered state using diamond grinding.
Physical Properties:
- Color: Ivory
- Density: 3.9 g/cm3
Applications:
- Electronic components & substrates
- High-temperature electrical insulators
- High voltage insulators
- Laser tubes
- Machined components
- Mechanical seals
- Precision shafts and axles in high-wear environments
- Roller and ball bearings
- Seal rings
- Semiconductor parts
- Shot blast nozzles
- Thermocouple tubes
- Tap plates
- Valve seats
- Wear components
- Wire and thread guides
- Ballistic Armor
99.5% Purity Alumina is a high-performance engineering material with exceptional mechanical strength, high-temperature resistance, and excellent electrical insulation properties. It is widely used in industrial equipment, electronic components, medical devices, and aerospace applications.
Physical Properties:
- Color: Ivory
- Density: 3.9 g/cm3
Applications:
- Electronic components & substrates
- High-temperature electrical insulators
- High voltage insulators
- Laser tubes
- Machined components
- Mechanical seals
- Precision shafts and axles in high-wear environments
- Roller and ball bearings
- Seal rings
- Semiconductor parts
- Shot blast nozzles
- Thermocouple tubes
- Tap plates
- Valve seats
- Wear components
- Wire and thread guides
- Ballistic Armor
99% Purity Alumina Is a premium industrial ceramic material with excellent mechanical properties, ultra-high hardness, high-temperature resistance, and insulation performance. It can maintain stable chemical and physical properties even in extreme environments, making it widely used in semiconductors, electronic components, laser technology, and aerospace.
Physical Properties:
- Color: Ivory
- Density: 3.85 g/cm3
Applications:
- Electronic components & substrates
- High-temperature electrical insulators
- High voltage insulators
- Laser tubes
- Machined components
- Mechanical seals
- Precision shafts and axles in high-wear environments
- Roller and ball bearings
- Seal rings
- Semiconductor parts
- Shot blast nozzles
- Thermocouple tubes
- Tap plates
- Valve seats
- Wear components
- Wire and thread guides
- Ballistic Armor
It is a regular purity grade Alumina (Aluminum Oxide) and it is one of the workhorses of the technical ceramics industry. It features a 96% purity Alumina base material providing a balanced “cost to quality” ratio. It is a hard-wearing technical ceramic offering an excellent combination of both mechanical and electrical properties and is ideally suited to a wide range of industrial applications where cost is of the essence, but the material still needs to perform adequately from a mechanical and electrical standpoint.
It can be machined in the “green state”- that is before sintering takes place, thus ensuring a large variety of shapes and sizes. It can also be diamond ground to tight tolerances in the fully sintered state using diamond grinding.
Physical Properties:
- Color: White
- Density: 3.75 g/cm3
Applications:
- Electronic components & substrates
- High-temperature electrical insulators
- High voltage insulators
- Laser tubes
- Machined components
- Mechanical seals
- Precision shafts and axles in high-wear environments
- Roller and ball bearings
- Seal rings
- Semiconductor parts
- Shot blast nozzles
- Thermocouple tubes
- Tap plates
- Valve seats
- Wear components
- Wire and thread guides
- Ballistic Armor
95% Purity Alumina is an economical and practical engineering material. Its slightly lower alumina content reduces production costs while maintaining decent wear resistance and processing flexibility. It is commonly used in mechanical parts, electrical insulators, and wear-resistant bushings, offering an excellent cost-performance balance.
Physical Properties:
- Color: White
- Density: 3.7 g/cm3
Applications:
- Electronic components & substrates
- High-temperature electrical insulators
- High voltage insulators
- Laser tubes
- Machined components
- Mechanical seals
- Precision shafts and axles in high-wear environments
- Roller and ball bearings
- Seal rings
- Semiconductor parts
- Shot blast nozzles
- Thermocouple tubes
- Tap plates
- Valve seats
- Wear components
- Wire and thread guides
- Ballistic Armor
Alumina Ceramic Machining
Alumina ceramics are produced through methods such as injection molding, die pressing, isostatic pressing, slip casting, and extrusion. After sintering and densification, machining requires diamond grinding techniques. Advanced Ceramic Hub utilizes cutting-edge green and biscuit machining technology to produce more complex components with traditional methods. Our advanced machining center includes drilling, grinding, milling, polishing, sawing, tapping, threading, and turning, enabling the manufacture of alumina ceramic components with tight tolerances and high complexity. During the machining process, the following precautions should be observed:
- Shrinkage Control: Alumina ceramics shrink by about 20% during sintering, requiring dimensional adjustments in the green body stage.
- Tolerance Control: Precise tolerances are unachievable in the green or pre-sintered state; fine machining should follow sintering.
- Diamond Grinding: Post-sintering, high-hardness alumina requires diamond grinding, as conventional methods fall short.
- Tool Selection: Diamond-coated tools or grinding wheels are essential to handle ceramic hardness and prevent tool damage.
- Temperature Control: Strict temperature management during sintering prevents cracking or deformation.
- Stress Management: Excessive stress during machining must be avoided to prevent brittle failure.
- Cutting Speed and Feed Rate: Controlled speeds and feeds ensure quality and extend tool life.
- Surface Treatment: Post-machining polishing removes defects, enhancing performance and appearance.
Alumina Ceramic Packaging
Alumina Ceramic products are typically packaged in vacuum-sealed bags to prevent moisture or contamination and wrapped with foam to cushion vibrations and impacts during transport, ensuring the quality of products in their original condition.
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