WEEK 8
3rd BRIEFING OF FINAL YEAR PROJECT
In this week, the briefing was conducted in TTL 2 and the attendance of all FYP 1 student is compulsory. The briefing was conducted by Dr. Imran Mohammad Sofi.
Date: 12th April 2017
Venue: TTL 2
Time: 3pm – 5pm
In this briefing, the FYP committees have briefed us about:
LITERATURE REVIEW
Journal 1
PIEZOELECTRIC
Piezoelectric Effect is the ability of certain materials to generate an electric charge in response to applied mechanical stress. The word Piezoelectric is derived from the Greek piezein, which means to squeeze or press, and piezo, which is Greek for “push”.
One of the unique characteristics of the piezoelectric effect is that it is reversible, meaning that materials exhibiting the direct piezoelectric effect (the generation of electricity when stress is applied) also exhibit the converse piezoelectric effect (the generation of stress when an electric field is applied).
When piezoelectric material is placed under mechanical stress, a shifting of the positive and negative charge centers in the material takes place, which then results in an external electrical field. When reversed, an outer electrical field either stretches or compresses the piezoelectric material.
The piezoelectric effect is very useful within many applications that involve the production and detection of sound, generation of high voltages, electronic frequency generation, microbalances, and ultra fine focusing of optical assemblies. It is also the basis of a number of scientific instrumental techniques with atomic resolution, such as scanning probe microscopes (STM, AFM, etc). The piezoelectric effect also has its use in more mundane applications as well, such as acting as the ignition source for cigarette lighters.
Applications Best Suited for the Piezoelectric Effect
- High Voltage and Power Sources
- Sensors
- Piezoelectric Motors
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