Ceramic Brazing to Stainless Steel

Ceramic Brazing to Stainless Steel

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

Ceramic Brazing to Stainless Steel

Ceramic-to-stainless-steel brazing provides a practical way to combine ceramic insulation with the mechanical strength and corrosion resistance of stainless steel. The main challenge is controlling thermal expansion mismatch and joint stress during heating and cooling.

Key Features

  • Strong ceramic-to-stainless-steel connection
  • Good corrosion resistance
  • High-temperature stability
  • Hermetic sealing capability
  • Suitable for complex geometries

Materials

Typical ceramic materials include alumina , while stainless steel options can be selected according to the application and operating environment.

Process Control

Surface cleaning, joint clearance, material matching, fixture alignment, brazing temperature, holding time, and cooling rate all influence final joint reliability.

Applications

Common applications include vacuum chambers, feedthroughs, semiconductor equipment, medical devices, fluid systems, and high-temperature industrial assemblies.

Have a ceramic and stainless-steel assembly that is difficult to join? Share the drawing or sample so the joint structure and brazing method can be reviewed before production.

Metallized Ceramic Catalog Download PDF