Piezoelectric behavior in solids, Physics

The world is derived from the Greek world which means to squeeze or press. It is usually described as the generation of electricity as a result of mechanical pressure. "When mechanical pressure is applied to any one of these materials, the crystalline structure generates a voltage which is proportional to the pressure." On the other hand when an electric field is applied, the structure changes shape creating dimensional alterations in the material only if the lattice owns no centre of symmetry, the phenomenon being called as piezoelectricity. This property is found in certain classes of crystalline materials including natural crystals of Quartz, Rochelle salt and tourmaline plus manufactured ceramics such as barium and lead

This special crystal structure has no centre of symmetry. This unit cell has a centre of symmetry. When unstressed the centre of the mass of the negative charges at the centre as shown. There is therefore no net polarization in the unit cell and p=0 when a mechanical force is applied to the cell in which the second row of charges is a line of symmetry. The distance between the second and third; the centre of mass of the negative charges still coincides with the positive charge. Hence, there is no change in the electric. This result is generally true for all crystal that has a centre of symmetry. 

Posted Date: 7/7/2012 6:38:25 AM | Location : United States







Related Discussions:- Piezoelectric behavior in solids, Assignment Help, Ask Question on Piezoelectric behavior in solids, Get Answer, Expert's Help, Piezoelectric behavior in solids Discussions

Write discussion on Piezoelectric behavior in solids
Your posts are moderated
Related Questions
A simple pendulum of frequency f has a metal bob.If the bob us negatively charged and is allowed to oscillate with a posively charged plate under it , the frequency will.? Ans) DUE

What is geocentric? It is a science where the earth is the center of the solar system and the other planets and the sun revolve around the earth. Though, most scientists say t

calour formed in pure and impure spectrum

Magnetic monopole A hypothetical particle that sinks of the magnetic field & constitutes sources. Magnetic monopoles have never been determined, but would cause fairly minor m


Properties of cement mortar 1. It should make good adhesion with building units like bricks, stones etc. 2. It should be capable of resisting penetration of water. 3. It s

When Temperature increases,intensity increases,but in some time intensity decreases,Why?


Q. Heisenberg's uncertainty principle of position & momentum. Describe an experiment to study the uncertainty of position & momentum.   Heisenberg's Uncertainty Principle : It

Interaction of X-rays With Matter Elaborating the 3 principle modes through which X-rays interact along with matter. Photoelectric effect, Pair Production Compton Effect,. Sel