Question

Which of the following materials is used for the generation of ultrasonic waves by using piezoelectric effect?
1. Copper
2. Quartz
3. Aluminium
4. Iron

Answer 1

Correct Answer - Option 2 : Quartz

• Piezoelectric ceramics are the best basis for generating and detecting ultrasonic waves.
• Piezoelectric and inverse piezoelectric effects are only exhibited by certain crystals that lack a center of symmetry.
• A series of powerful piezoelectric materials are available to generate ultrasound in ultrasonic probes. These materials differ in their physical properties.
• Depending on the application and the required probe characteristics, the one or the other material is more advantageous, sometimes for acoustic or technical reasons, sometimes even for economic reasons.
• Few common materials used are quartz, lithium sulfate or barium titanate etc...