INDUSTRY COMPONENT

Insulator

High-voltage insulator for electron gun applications in vacuum environments

Component Specifications

Definition
A specialized ceramic or glass component designed to electrically isolate and mechanically support high-voltage electrodes within electron guns, preventing arcing and maintaining vacuum integrity in cathode ray tubes, electron microscopes, and particle accelerators
Working Principle
Provides electrical insulation through high dielectric strength materials while maintaining structural stability under thermal stress and vacuum conditions, preventing electron leakage and ensuring precise beam focusing
Materials
Alumina (Al2O3) ceramic (96-99.5% purity), boron silicate glass, or high-purity steatite; may include metalized coatings (tungsten, molybdenum, or nickel) for brazed connections
Technical Parameters
  • Surface Roughness <0.4 μm Ra
  • Volume Resistivity >10^14 Ω·cm
  • Dielectric Strength >15 kV/mm
  • Vacuum Compatibility <10^-6 Torr
  • Operating Temperature -200°C to 500°C
  • Thermal Expansion Coefficient 6-8 × 10^-6/°C
Standards
ISO 14744, DIN 4000-7

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Insulator.

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Dielectric breakdown under high voltage
  • Thermal stress cracking
  • Vacuum leakage
  • Surface charge accumulation
FMEA Triads
Trigger: Surface contamination from handling
Failure: Reduced dielectric strength leading to arcing
Mitigation: Implement cleanroom handling procedures and plasma cleaning before assembly
Trigger: Thermal expansion mismatch with metal electrodes
Failure: Cracking during temperature cycling
Mitigation: Use graded seals or compliant metal layers between materials

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.1 mm dimensional, ±0.5° angular alignment
Test Method
High-potential testing at 1.5× operating voltage, helium leak detection <10^-9 mbar·L/s, thermal cycling 50 cycles

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What causes insulator failure in electron guns?

Primary causes include dielectric breakdown from surface contamination, thermal cracking due to coefficient mismatch, and vacuum leaks from micro-fractures

Can different insulator materials be interchanged?

No - material substitutions require complete redesign due to differences in thermal expansion, dielectric properties, and brazing compatibility

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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