Vacuum Ceramic Brazing Components

Vacuum Ceramic Brazing Components

No. Parameter Typical Value / Specification Unit
1 Alumina Purity 95%or 99%  %
2 Bulk Density 3.63 g/cm³
3 Thermal Conductivity (25°C) 22.45 W/m·K
4 Coefficient of Thermal Expansion (20–1000°C) 8.26 ×10⁻⁶/°C
5 Flexural Strength ≥340 MPa
6 Dielectric Strength ≥8.3 kV/mm
7 Dielectric Constant (1 MHz) 9.1 @1MHz
8 Dielectric Loss (1 MHz) ≤0.0004 @1MHz
9 Metallization Layer (Mo/Mn) 15–25 μm
10 Plating Layer (Ni/Cu/Au etc.) 8–10   μm

Vacuum Ceramic Brazing Components

Vacuum ceramic brazing is designed for components that must maintain stable hermetic performance under vacuum conditions. A controlled vacuum furnace environment reduces oxidation and helps produce clean, consistent brazed joints.

Key Features

  • High hermeticity
  • Low leakage risk
  • Controlled brazing atmosphere
  • Stable ceramic-metal interface
  • Suitable for high-vacuum applications

Materials

Alumina, Kovar, stainless steel, copper, molybdenum, and other compatible materials can be considered according to the application.

Process

The typical process includes surface preparation, metallization when required, component alignment, vacuum brazing, controlled cooling, and final inspection.

Helium leak testing can be used when hermetic sealing is a critical requirement.

Applications

Designed for vacuum feedthroughs, vacuum electronics, semiconductor equipment, X-ray tubes, vacuum chambers, and other hermetic assemblies.

For vacuum projects, provide the required leakage rate, working pressure, temperature, and component drawing so the brazing design can be evaluated.

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