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non-spherical fine material

non-spherical fine material

non-spherical fine material

(OP)
Hi all,

Looking for a very small quantity (a gram or less?) of a material that is non-spherical, with a diameter in the range of 1-15um.  We're looking at defects in a thin film of Liquid Crystal and would like something besides round latex beads.  A rod-shape (d~1-2um, l~5-10um)  would be interesting as would a hex-shaped material.  Any ideas?

Sorry if this is naive...

RE: non-spherical fine material

There are some metal powders that are formed electolytically that are elongated.  There may also be some abrasive media that have a shape that would work for you.

= = = = = = = = = = = = = = = = = = = =
Rust never sleeps
Neither should your protection
http://www.trent-tube.com/contact/Tech_Assist.cfm

RE: non-spherical fine material

You should be able to get glass or carbon fibers in your range.

One standard our physical testing lab used was a carbon fiber that had a metallic coating. From the windmills of my mind it may have been nickel.

Anecdotal:
At one time asbestos fibers were used.

RE: non-spherical fine material

I almost posted something yesterday about asbestos, but thought that it was too troublesome.  Inco was experimenting with nickel-coated carbon.  Not sure if this is still active, but worth a look.

RE: non-spherical fine material

You might want to give Barton Mines a call. They are offering very fine grade garnet powder. It looks like they can classify any size you need. You can probably get sevral sizes with different distributions for a lot less money that some of the others.


http://www.barton.com/precision_powders.cfm

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