High-Temperature Resistant Alumina Ceramic Insulation Tubes For High-Speed Rail Power Systems

Product Introduction

Our alumina ceramic insulation sleeves are manufactured from 99.5% high-purity alumina material, specifically designed for insulation protection in high-voltage electrical equipment and high-temperature environments. Featuring exceptional insulation strength (>20kV/mm) and hardness (above 1600HV), with special glazed surface treatment achieving arc resistance over 300 seconds, these sleeves represent the ideal replacement for traditional organic insulation tubes.

Key Applications

• Power Systems: High-voltage cable termination protection, substation insulation sleeves

• New Energy: PV inverter insulation covers, wind power converter protection tubes

• Industrial Equipment: Electric furnace heating element protection tubes, high-voltage test equipment insulation covers

• Rail Transit: High-speed rail power system insulation, metro third rail protection

• Laboratories: High-voltage experimental equipment insulation barriers, plasma equipment protection sleeves

Core Advantages

⚡ Superior Insulation: Volume resistivity >10¹⁶Ω·cm, withstand voltage >20kV/mm
⚡ High-Temperature Resistance: Continuous operation up to 1200℃, short-term withstand 1500℃
⚡ Arc Resistance: Meets highest grade of IEC 60672-1 standard
⚡ Mechanical Strength: Flexural strength >400MPa, compressive strength >3000MPa
⚡ Weather Resistance: No cracking in -60℃~1200℃ thermal cycling

Technical Specifications

Manufacturing Process

1. Powder Preparation: High-purity alumina powder (D50=0.6μm)

2. Isostatic Pressing: 250MPa high-pressure forming for uniform density

3. Atmosphere Sintering: 1650℃ nitrogen-protected sintering

4. Precision Machining: Simultaneous OD/ID grinding (concentricity ≤0.01mm)

5. Surface Treatment: High-temperature glazing (surface resistance >10¹⁴Ω)

6. Full Inspection: 100% withstand voltage test + ultrasonic testing

Installation Guidelines

⚠ Professional Recommendations:

• Clean inner/outer surfaces with isopropyl alcohol before installation

• Recommend using ceramic-specific sealant for fixation

• Avoid mechanical impact and localized stress concentration

• Regular inspection of glaze layer integrity (recommended annually)

• Not suitable for strong fluoride environments

Service Commitment

• Quality Warranty: 60-month extended warranty

• Technical Support: Free insulation system design consultation

• Rapid Response: Regional emergency spare parts inventory

• Product Traceability: Laser-marked identification with 10-year quality records

• Customization: Special sizes and structural designs available

Technical FAQ

Q: How to determine when replacement is needed?
A: Replace when surface cracks exceed 10mm length or glaze layer loss >5% area

Q: Selection for humid environments?
A: Recommend moisture-proof models with special hydrophobic treatment

Q: Compatibility with other insulation materials?
A: Can be used with silicone rubber/epoxy resin when using special interface agents