50
Why can iridium now be used in
electrodes?
DENSO is now able to use iridium because of our technology in
the field of precious metals, for which we are a world-leader
and also because of our advanced laser welding technology.
Q
8
A
In what other fields is iridium commonly used for?
Because of its high melting point and superb
corrosion resistance, iridium is used widely in
fields employing state-of-the-art technology
such as the aerospace, medical, and motor
vehicle industries.
Q
9
A
As explained in the answer to
Q7
, iridium is an extremely hard material.
In the past, sintering material was generally cut and this meant
high
costs
and
restrictions on processing form and dimensions
.
Therefore, it could not be used as a material in spark plugs. However, our
new precious metals technology has meant that we can now process
iridium by drawing
it in its melted form. This enables iridium to be
processed in all dimensions and forms. Therefore, DENSO has moved
quickly to use it as a material for use in spark plug electrodes.
■
Components in aerospace industry
■
Electrodes for equipment used in clinical medicine
such as pacemakers and catheters
■
Metal pots for growing crystals for electronic industries
■
Automobile catalyzers
■
Jewelry
