Investigatory Subject

Topics: Iridium, Spark plug, Internal combustion engine Pages: 3 (648 words) Published: January 23, 2013
Advantages of ITO
Consistency and reproducibility
Ability to produce large displays
Mature technology
Optically Transparent
Electrically conductive
Can be chemically etched

Disadvantages of ITO
Expensive and time-consuming multi-stage process
Short supply: Indium is a by product of other mining operations, e.g. zinc and lead Wasteful of expensive ITO - 15 to 30% efficient
Indium price around US$800 per kg
Inflexibility - large scale production
Environmentally unfriendly acid etch process


The main metal used in ordinary spark plug is nickel-iron or chromium based substance. I am not going to describe about the chemical properties and all because it will turn out to be a chemistry class. Simply put, Iridium is one of the hardest, strongest, and precious and one of the rarest metals found on earth’s crust.Iridium is the best, but too hard to handle. Iridium is 6 times harder, 8 times stronger and can withstand temperatures exceeding 2454° C. Unfortunately, the incredible properties that make it the perfect metal for building spark plugs also made it impossible to work with until now.

(Disadvantages): We can’t properly say a disadvantage for using an iridium plug. But commonly Iridium plugs are used where high efficiency or high tuning is needed. In most of the other cases, normal spark plug is enough. It is mainly used in high performance engines like our Yamaha R15 or the incredible tourer’s the Karizma and the Pulsar 220’s. I said this because one of my friends came and asked me whether he can fit an Iridium spark plug to his Hero Honda splendor. I said yes, it can be fitted to any vehicle provided the manufacturer has the specified model. But fitting it to a small engined vehicle like my friend’s does not completely justify the amount we are investing for getting an Iridium plug and furthermore, the daily commuter is not going to gain any noticeable improvements.

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