Recent content by Silicon

We know that the permittivities of ferroelectric materials are dependent of temperature because of phase transitions. I want to kown if this is also true in non-ferroelectric materials? If it is true what is the mechanism of it?

My sample is too small and curly so that I don't think the normal method to measure the refractive index is useful.

I want to measure the refractive index of a thin cantilever ; however the sample is too small (about tens of microns). on the other hand, the cantilever maybe not flat at all and it is curly. how can I do it?

What is "the disjoining pressure" and What is "the Hamaker function".

It is so kind of you and I really appreciate your help.

Not only piezoelectric crystals, but also some other non-piezoelectric materials have this effect. Why can it happen?

How can the electric polarization be induced by the strain gradient? It is said in some papers the strain gradient can induce electric polarization in solid materials. Why can it happen? Who can explain this phenomenon to me?

Althogh I don't have a fax number, thank you all the same.:smile:

Who can explain the Landau-GinZburg-Devonshire free energy to me. In which book can I find this conception?

I want to read this paper: "Sh. M. Kogan, Sov. Phys. Solid State 5, 2069 1964." However it is too old so I can't find it. Who can find it for me? Can you send it to this email: hjq_seu@hotmail.com. thank you very much!

Does it mean that orientational polarization will not affect the permittivity of the other solid?

We know quartz,viz. crystal silicon oxide is a kind of piezoelectric solid.Does the amorphous silicon oxide present piezoelectricity also. If not,Why? -------------------------------------------------------------------------- I'm not good at English, so if there is any language errors in my...

I konw that the defect centers in a dielectric contribute to the electric polarization and thus affect the permittivity.If there is any microscopic theory can derivate the relationship between the defect centers and the permittivity?