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
The displacement of body in particular second is given by the equation Sn=u+a (2n-1)÷2, u is speed and a is acceleration. Dimensions of Sn are?



Five coulombs of charge are placed on a thin-walled conducting shell. Once the charge has come to rest, the electric potential in the hollow conducting shell is found to be:

conservation laws A law that states that, in a closed system, the whole quantity of something will not enhance or reduce, but exactly remain the same; i.e., its rate of altera

Ultrasonic-interferameter 1.defenition 2.applications 3.uses 4.free lenth 5.Compressibility Ans)An Ultrasonic Interferometer is a easy and direct device to determine the ul

why The magnitude of known potential difference must be greater than the value of unknown potential difference to be measured.

what arethe concepts oflight


Explain the Machine A machine is anything that makes work easier. Does it do the work for you? No, you don’t get something for nothing in this world, but it can make the work e