Ceramic pillars are often used to separate electrical wires

Ceramic pillars are often used to separate electrical wires from each other on high voltage lines, what do you think the advantages of using ceramics to insulate high voltage as opposed to a polymer?

Solution

1. Ceramics are hard,strong and brittle.

2. Ceramics have high tension so that they can withstand the electrical voltage stresses.

3. They have high melting temperature so that they can withstand higher voltages.