Joining Technology

Active Brazing Filler Metals

Our active brazing filler metals enable direct ceramic brazing.

Our active brazing filler metals enable direct bonding of two ceramics, or ceramics to metals, regardless of whether they are oxides or nitrides, without metallization.


  • Enables direct bonding of ceramics without metalized layers 
  • Provides bonding strength equivalent to or higher than conventional methods 
  • Prevents cracks caused by a difference in thermal expansion between metals and ceramics


ProductComponentMelting pointFormDimensions
TKC-651AgCuSnTi alloyApprox. 770°CSheetWidth: 110 mm or less
Thickness: 0.05 mm or more
TKC-651AgCuSnTi alloyApprox. 770°CWireDiameter: 0.2 mm or more

Active Metal Brazing Method

Adding active metals such as titanium to conventional brazing filler metals provides improved wettability and bonding strength. With active brazing filler metals, bonding can be performed with a single heating, enabling the work to be done with less man-hours and shorter lead times.


Bonding of ceramic jigs, engine components, electronic components for ceramic heat sinks, ceramic circuit boards, etc.

Bonding conditions
Bonding should be carried out by conducting preplaced brazing under the following conditions: In a vacuum of 2 x 10-2 Pa or less or in an inert atmosphere with a dew point of -55°C or less (ex. Ar); at a temperature of between 790 and 850°C; and with a melting time of 1 to 5 minutes 

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