I thought monocrystalline silicon is not a piezoelectic material.
silicon has a symmetrical crystalline structure with covalent bondings. Most
of piezoelec. material lacks a center of symmetry and are with ionic bonds.
(e.g. NaCl)

piezoelectric effect is not equivalent to peizoresistive effect.

hope it helps.

----- Original Message -----
From: "Deepak Kandikuppa" 
To: 
Sent: Monday, November 28, 2005 12:46 AM
Subject: [mems-talk] peizoelectric materials


> hi everyone,
> Can somebody tell me why single crystal silicon is not used as a
> piezoelectric material,but is used as piezoresistive material.
> pls mail me asap..