[mems-talk] Re: effective dielectric constant

[Stephan Biber]

Dear Paul Safier,

That's a tricky problem. If you need a precise solution, you are in 
trouble. If you need a first estimate, then try to do some research on 
mixing formulars from people like Garnett, Bruggeman, Looyenga or 
Berman. A starting point would be: 
http://www.mtheiss.com/docs/sc2_tu2/ex1_step2.htm

Some more specific information can be found in: IEEE Transactions on 
antennas and propagation. Foe example: "Novel Material with narrow-band 
transperency window in the bulk" written by C.A. Kyriazidou et al. (vol. 
48, no1, pp.107-117). Although this is a more theoretical paper, there 
are also lots of other references.

I hope this helps!

Stephan

___________________________________________________________

Stephan Biber 
University of Erlangen-Nuremberg
Institute for Microwave Technology
Lehrstuhl fuer Hochfrequenztechnik
Cauerstr. 9
91058 Erlangen
GERMANY
Tel. (49) 9131 85 27223
Fax. (49) 9131 85 27212
stephan.biber at lhft.e-technik.uni-erlangen.de
Raum 5.29
www.lhft.de
http://www.lhft.eei.uni-erlangen.de/lhft.php3?id=mitarbeiter&pg=main&who=stephan

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>Today's Topics:
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>   1. Effective Dielectric Constant of a Suspension of Spheres
>      (paul safier)
>  
>
>
> ------------------------------------------------------------------------
>
> Betreff:
> [mems-talk] Effective Dielectric Constant of a Suspension of Spheres
> Von:
> "paul safier" <psafier at hotmail.com>
> Datum:
> Fri, 16 Jan 2004 14:37:23 -0700
> An:
> mems-talk at memsnet.org
>
>
> Hello,
>
> I need to estimate the effective dielectric constant for a dilute 
> suspension of spheres of barium titanate (0.025 Vol %, 
> epsilon=300-10,000) in castor oil (epsilon=4). Can anyone offer a 
> suggestion?
>
> Thank you.
> Paul Safier
>
>
>
> **********************************************************************
> Paul Safier
> Department of Chemical Engineering
> University of Arizona
> (520) 275-0824
> **********************************************************************
>
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