Question

Which of the following ceramic materials will be used for spark plug insulator?

• A. SnO\(_2\)
• B. \(\alpha\)-Al\(_2\)O\(_3\)
• C. TiN
• D. YBaCuO\(_7\)

Hint:

- Alumina (\(\alpha\)-Al\(_2\)O\(_3\)) is a high-performance ceramic with high thermal conductivity and electrical insulation.

Answer 1

The Correct Option is B

Step 1: Understanding the properties of spark plug insulators. 
- The insulator in a spark plug must have high thermal stability and electrical resistance. 
- Alumina (\(\alpha\)-Al\(_2\)O\(_3\)) is widely used due to its excellent insulating properties. 
Step 2: Selecting the correct option. 
Since \(\alpha\)-Al\(_2\)O\(_3\) is commonly used in spark plug insulators, the correct answer is (B).