Ceramic Feedthroughs

Ceramic Feedthroughs

Ceramic feedthroughs are much more than meets the eye. These seemingly simple components play a vital role in transmitting signals and energy across various technological fields. Often referred to as intricate bridges, they connect different mediums while maintaining exceptional electrical insulation and vacuum integrity.

What Makes Ceramic Feedthroughs So Remarkable?

The widespread use of ceramic feedthroughs can be attributed to their exceptional properties:

• Superior Strength and Durability:

  • Average compressive strength: ≥500 MPa
  • Mohs hardness: ≥9
  • Service life: ≥10 years

• Unmatched Electrical Insulation:

  • Volume resistivity: ≥1012Ω·cm
  • Breakdown voltage: ≥5 kV
  • Dielectric loss tangent: ≤0.001

• Exceptional Thermal Conductivity:

  • Thermal conductivity: ≥10 W/(m·K)
  • Heat dissipation efficiency: ≥95%

• High-Performance Vacuum Sealing:

  • Leak rate: ≤10-10 Pa·m³/s
  • Vacuum integrity: ≥10-6 Torr

These properties make ceramic feedthroughs ideal for various applications demanding reliability, precision, and resilience in harsh environments.

The Meticulous Manufacturing Process of Ceramic Feedthroughs

The creation of these remarkable components involves a meticulous manufacturing process, typically incorporating the following steps:

1. Raw Material Preparation:

   • Stringent purity standards for ceramic powder (≥99.9%)
   • Precise control over particle size distribution (D50 ≤ 5 μm)
   • Accurate measurement and control of additive usage (error ≤ 1%)

2. Forming:

   • Exceptional forming precision (±0.01 mm)
   • Meticulously maintained surface roughness (Ra ≤ 0.2 μm)
   • Tight dimensional consistency (≤ 0.5%)

3. Drying:

   • Uniform drying temperature with precise control (±2 ℃)
   • Accurate drying time control (error ≤ 1 hour)
   • Low moisture content maintained (≤ 0.5%)

4. Sintering:

   • Precise control over sintering temperature (±5 ℃)
   • Accurate sintering time control (error ≤ 2 hours)
   • High relative density achieved (≥ 95%)

5. Machining:

   • Impeccable machining precision (±0.005 mm)
   • Mirror-grade surface finish
   • Dimensional tolerances conforming to GB/T 1804 standard

6. Testing:

   • Rigorous electrical performance testing following GB/T 19015 standards
   • Mechanical performance testing adhering to GB/T 7073 standards
   • Vacuum sealing performance testing complying with GB/T 17286 standards

Applications of Ceramic Feedthroughs

Ceramic feedthroughs find applications in a wide range of industries due to their unique properties. Here are some prominent examples:

• Electronic Devices:

  • Used in over 1 billion devices annually
  • Common applications include capacitors, resistors, transformers, and connectors
  • Function within temperature ranges of -55°C to 200°C and voltage ranges of 0V to 10kV

• Medical Equipment:

  • Employed in over 1 million devices annually
  • Typical applications include X-ray machines, MRI equipment, and laser treatment devices
  • Facilitate high-frequency signal transmission within sterile environments

• Vacuum Equipment:

  • Utilized in over 10,000 devices annually
  • Common applications include electron beam evaporators, sputter deposition equipment, and vacuum pumps
  • Function within high-vacuum environments with pressures ≤ 10-6 Torr

• Aerospace Industry:

  • Employed in over 1,000 devices annually
  • Typical applications include radar systems, communication systems, and navigation systems
  • Withstand high-intensity vibrations, extreme shocks.