🚀 go-pugleaf

In article <1992Dec21.195127.11649@gn.ecn.purdue.edu> chenye@gn.ecn.purdue.edu (YM Chen) writes:
>Recenterly, we are starting to use a small particle to polish ceramics.
>Unfortunately, the particles (1 micron alumina) have a lot of static
>charges and, therefore, cause many bubble in the slurry.
>we have talked to the sales representative of the company who made this
>particles and get no answer.  Is there anyone have any suggestion to
>remove the static charges in the particles?

There are several companies that make air ionization equipment. By gently
passing this over your powder, most of the static charge can be neutralized.
If a large quantity of powder needs to be neutralized one could set up some
way of "bubbling" ionized air or nitrogen through a container of powder. One
should be careful in how the powders are handled after neutralization. Any
vigorous motion could quickly build up charges again. Even the simple act of
pouring the powder might charge it to unacceptable levels. Pouring may need to
be done in a gentle wash of ionized air.

Two examples of companies with air ionizers are 
     Ion Systems
     Static Control Systems

Check in the trade magazines Buying Guides (Microcontamination, Clean Rooms,
Semiconductor International, etc.) for other companies and phone numbers. 
Good Luck.

Lonnie Houck
llh@mvuzr.att.com