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Alumina Ceramic Pad Gasket is special ceramic structural component made from high-purity alumina (Al₂O₃) as the main raw material, precision-manufactured through high-temperature sintering (1600-1700℃). As a key functional component in industrial equipment, this product combines ultra-high hardness, excellent insulation, high-temperature resistance, and chemical stability. It is widely used in high-end manufacturing fields such as electronics, electrical engineering, new energy, precision machinery, and aerospace, and is an irreplaceable high-performance basic material in modern industry.
Al2O3 Ceramic Pad Gasket
Core material system
| Material grade | Alumina content | Applicable Scenarios | Performance characteristics |
| 95 porcelain | 95% | General industry, machinery manufacturing | Best value for money, well-balanced overall performance |
| 9 porcelain | 99% | Electronics and electrical engineering, semiconductors | High insulation, low dielectric loss, precision machining |
| 99.5 porcelain | 99.5% | Aerospace, medical equipment | Ultra-high purity, good biocompatibility |
Key performance parameters
1. Mechanical Properties
Mohs hardness: ≥8.8 (95% ceramic) / ≥9.0 (99% ceramic), second only to diamond
Flexural strength: ≥300 MPa (99% ceramic can reach 382 MPa)
Compressive strength: ≥2300 MPa
Elastic modulus: 393 GPa
Fracture toughness: 5 MPa·m¹/²
2.Thermal Properties
Long-term operating temperature: 1200-1600℃ (depending on purity grade)
Short-term temperature limit: 1700℃
Thermal conductivity: 20-30 W/(m·K) (99% ceramic)
Coefficient of thermal expansion: 8.2×10⁻⁶/°C (25-1000℃)
Thermal shock resistance: excellent, does not become brittle under rapid cooling and heating.
3.Electrical Properties
Volume resistivity: ≥10¹⁴ Ω·cm
Dielectric strength: ≥15 kV/mm
Dielectric constant: 9.7 (1MHz)
Dielectric loss: extremely low, suitable for high-frequency circuits
4.Chemical Properties
Acid and Alkali resistance: resistant to strong acids, strong alkalis, and organic solvents
Oxidation resistance: stable performance in high-temperature oxidizing/reducing atmospheres
Biocompatibility: purity above 99.5% meets medical implant standards
Product Advantages
1.Precision dimension control: utilizing isostatic pressing and CNC precision machining, dimensional tolerances can reach ±0.01mm, and surface roughness Ra 0.2-0.4μm, meeting micron-level assembly accuracy requirements.
2.Customizable structure: supports complex structural designs such as irregular shapes, slots, holes, and threads, adapting to various installation scenarios.
3.Ultra-long service life: Wear resistance is 5-8 times that of ordinary steel, and service life can reach 3-5 times that of metal parts under corrosive, high-temperature, and high-load conditions, significantly reducing equipment maintenance costs.
4.Balanced insulation and thermal conductivity: possesses both excellent electrical insulation and moderate thermal conductivity, making it as an ideal choice for electronic packaging and power device heat dissipation.
Application
| Applications | Core role |
| 1.Electronic and electrical fields |
(1)Power semiconductors: IGBT module insulating pads, heat sinks (2)LED lighting: insulating and heat dissipating pads for high-power lamps (3)High-voltage equipment: insulation support components for transformers and frequency converters (4)5G communication: insulation isolation pillars for base station radio Frequency devices |
| 2. New energy industry |
(1)Lithium batteries: cell thermal pads, module insulation supports (2)Photovoltaic equipment: thermal insulation buffer components for high-temperature process sections (3)Fuel cell: bipolar plate insulation sealing gasket (4)Charging piles: high-voltage insulation structural components |
| 3.Precision Machinery Manufacturing |
(1)Automated equipment: precision positioning pads, insulated guide rails (2)Ceramic bearings: insulating bearing gaskets for high-speed motors (3)Vacuum equipment: insulated support for vacuum chamber, non-magnetic pads (4)Robots: joint insulation pads, lightweight structural components |
| 4.Aerospace and military industry |
(1)Aero engines: high-temperature heat insulation gaskets, insulating support rings (2)Satellite payload: lightweight structural pads, thermal control components (3)Radar system: high-frequency insulating gaskets, non-magnetic structural components |
| 5.Medical equipment |
(1)Medical imaging: non-magnetic insulating strips for CT/MRI equipment (2)Surgical instruments: High-temperature sterilization resistant pads (3)Implantable device: biocompatible support structure (99.5% high-purity ceramic)
|
Manufacturing process and quality control
1.Production process
High-purity alumina powder → Isostatic pressing → High-temperature sintering (1600-1700℃) → Precision machining (CNC/grinding) → Surface treatment → Quality inspection → Finished product
2.Testing standards
Dimensional accuracy: 100% inspection by coordinate measuring machine
Material density: Archimedes' method of water displacement
Microstructure: SEM (Scanning Electron Microscopy) analysis
Performance testing: bending strength, insulation resistance, and withstand voltage test.
Complies with standards: GB/T 5593, ASTM C373, MIL-STD-883
Selection Guide
| Application requirements | Recommended materials | Key considerations |
| General industrial thermal insulation | 95 Porcelain | Cost-sensitive, balanced performance |
| Electronic insulation and heat dissipation | 99 Porcelain | High insulation + moderate thermal conductivity |
| High frequency high voltage circuit | 99 Porcelain | Low dielectric loss |
| Medical Implants/Bio | 99.5 Porcelain | Biocompatibility certification |
| Ultra high temperature (>1500℃) | 99 Porcelain/Corundum | Thermal stability is preferred |
| Highly corrosive environments | 99 Porcelain | Chemical inert |
Our customized Process
Why choose us?
1.Customized R&D, rather than standard product adaptation
2.Deep control of materials science：Material Selection Based on Needs，Microstructure Optimization，Batch Consistency
3.Precision machining capability：Flatness can reach 0.001mm, parallelism 0.002mm, and roughness Ra 0.1μm.
FAQ
Q1: What products does your company offer?
We specialize in high-performance ceramics such as alumina and silicon nitride, providing insulators, structural components, wear-resistant parts, and customized solutions.
Q2: Can you customize non-standard parts?
Yes. We support processing based on provided drawings and collaborative technical development, offering a full-process service from design to mass production.
Q3: What about accuracy and delivery time?
Standard tolerance ±0.05mm, precision grade ±0.01mm; samples 7-15 days, bulk orders 20-30 days.
Q4: Main application areas?
Power, electronics, machinery, chemical, and aerospace industries.
Q5: Quality assurance measures?
Full-process quality inspection, providing material reports and performance test data, supporting third-party certification and testing.
Q6: Do you provide technical support?
We provide professional support such as material selection consultation, design optimization, and failure analysis.
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