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Electrical applicationsCeramic is a perfect electrical insulator.

Electric cables has to be stretched across the land on electric (utility) poles, and those are built with steel, or an electric conductor. But we cannot let the electricity leak to the utility pole for two good reasons.

  1. It is potentially dangerous to leave a utility pole connected to electricity, that it is likely that someone or an animal would touch it.
  2. Electricity can leak to the ground and waste in large volumes.

Therefore, a ceramic block is placed on the utility pole and the electric cable is run above the ceramic insulator, mechanically affixing the cable above the utility pole, isolating them electrically.

Ceramic is also a good heat insulator and withstand a high temperature. Therefore ceramic is also good in electric appliances that involves heat. Ceramic bits are used in high grade electric soldering irons. Electric hotplates can be manufactured because there we have ceramic!

Now we have Bakelite and plastic for many cases where they used ceramic in electrical industry few decades ago. Ceramic is now limited when there is a requirement for durability than plastic and electric heat that plastic cannot stand.

Electronic applicationsAlso, ceremic is used as an electrolytic element in capacitors and signal filters. internet ADSL / PSTN splitters use a ceremic filter to filter high frequency ADSL band from Low frequency telephone signal.

A ceramic (mixed) coating is used as a protective coating for electronic resistors and capacitors, as it is a good insulator.

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