Precision Ceramic Processing For Alumina Ceramic Insulating Sleeves In High-Performance Applications
Precision Ceramic Processing For Alumina Ceramic Insulating Sleeves In High-Performance Applications
Product Introduction
Alumina ceramic insulating sleeves are specialized ceramic tubes manufactured from high-purity aluminum oxide (Al₂O₃). These components exhibit exceptional electrical insulation properties, mechanical strength, and high-temperature resistance. Produced through precision ceramic processing with smooth, dense surfaces, they provide ideal insulation protection for electrical, electronic, and industrial equipment operating in extreme environments.
Primary Applications
-
High-voltage electrical equipment: Insulation protection for transformers, circuit breakers, insulators
-
Electronic components: Insulation sleeves for semiconductor devices, vacuum tubes, sensors
-
Industrial heating systems: Protection tubes for high-temperature furnaces, heating elements, thermocouples
-
Special environments: Insulation protection in corrosive media and high-radiation conditions
Product Advantages
-
Superior insulation: Volume resistivity >10¹⁴Ω·cm, dielectric strength >15kV/mm
-
High-temperature resistance: Continuous use up to 1600°C, short-term tolerance to 1800°C
-
Excellent mechanical strength: Flexural strength >300MPa, hardness >9 Mohs
-
Chemical stability: Resistant to acid/alkali corrosion, non-aging, long service life
-
Precision dimensional control: Inner diameter tolerance within ±0.02mm
Technical Specifications
| Parameter | Specification |
|---|---|
| Material purity | 99.5% Al₂O₃ |
| Density | 3.8-3.9g/cm³ |
| Flexural strength | ≥350MPa |
| Thermal expansion | 7.5×10⁻⁶/K(20-1000℃) |
| Max. service temp. | 1600°C (continuous) |
| Insulation resistance | >10¹⁴Ω·cm(20℃) |
| Standard sizes | Φ2-150mm×L10-500mm |
Manufacturing Process
-
Material preparation: Fine grinding and formulation of high-purity alumina powder
-
Forming processes: Isostatic pressing/extrusion/slip casting
-
High-temperature sintering: Precision-controlled sintering at 1650-1800°C
-
Precision machining: Internal/external grinding, end face polishing, laser drilling
-
Quality inspection: Dimensional checks, insulation tests, strength tests
Usage Instructions
-
Avoid impact during installation to prevent brittle fracture
-
Consider thermal expansion in high-temperature applications
-
Use flexible gaskets when mating with metal components
-
Regularly inspect surface cleanliness to prevent conductive deposits
Service Commitment
-
24/7 technical support team
-
Product selection and technical consultation
-
Custom solutions available (15-30 day lead time)
FAQ
Q: What voltage can alumina ceramic sleeves withstand?
A: Standard products withstand 15-30kV/mm; specially designed units up to 50kV/mm
Q: Can you produce non-standard shaped insulating sleeves?
A: Yes, we customize various shapes including tapered and stepped designs
Q: What is the minimum achievable wall thickness?
A: Standard minimum is 0.5mm; 0.3mm available with special processes
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.