Automotive Materials

Automotive Materials

High functionality, low precious-metal content, and reliability TANAKA seeks to unlock the unlimited potential of precious metals.

Precious metals inherently possess excellent characteristics such as the following: contact reliability in harsh conditions; oxidative resistance in high temperature conditions; high activity that accelerates chemical reactions; and resistance to high-voltage discharges. To these characteristics, TANAKA adds the functions required for automotive materials and offers our customers new added value from development to function assurance.

Automotive Materials Development


  • Materials for highly-durable spark plugs made from iridium alloys and platinum alloys
  • Materials for exhaust gas sensor heaters, reactive electrodes, and lead wire formation
  • Materials for multi-wire brushes and scratch brushes with high contact-reliability
  • Materials for colloids, nanoparticles, electrodes, catalysts, and joining materials

Developed Products

Spark plug materials

  • Iridium alloy chips and platinum alloy chips for the center electrode and the ground electrodes
  • Low precious metal content cladding tape

Formation materials for exhaust gas sensor electrodes

  • Platinum and platinum alloy paste
  • Platinum plating process

Sliding materials

  • Multi-wire brushes
  • Scratch brush contacts
  • Small welded contacts


Iridium alloy chip Spark plug, Pt paste Oxygen sensor AMulti-wire brush Throttle airflow meter

Iridium alloy chip Spark plug

Pt paste
Exhaust gas sensor

Multi-wire brush Throttle airflow meter

[Explanation diagram of where automotive materials are used] From top left: Piezo injector, Acceleration pedal position sensor, Swirl sensor, Throttle sensor, Air-flow meter, Exhaust gas sensor, Fuel sensor