Aamer,  The mechanical properties of Al2O3 are a function of many factors
principally density and grain size.  As an example a fully dense, small
grain size material will have a modulus or rupture approximating 40K psi,
or even higher, whereas a material that is only 75% of theoretical density
with large grains might have less than half that strength.  So you really
have to take into account the density and grain size for all of the
properties to which you refer.  Hope this helps.  Gary

Gary Hillman
Service Support Specialties, Inc.
9 Mars Court
PO Box 365
Montville, NJ 07045
973-263-0640
973-263-8888.




-----Original Message-----
From:   Aamer Mahmood [SMTP:[email protected]]
Sent:   Thursday, September 30, 2004 9:51 PM
To:     [email protected]
Subject:        [mems-talk] Bulk Al2O3 properties

Hello all,
I need to know the mechanical, optical and thermal properties of bulk
Al2O3. I am particularly interested in the yield strength of the material.

One can easily find info for saphire but I am sputtering 1-3 um
layers of Al2O3 at room temp.

Any link/source to this kind of info will be appreciated.

Thanks

Aamer Mahmood
Microsensors lab
UT Arlington

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