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- Newsgroups: sci.materials
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!uwm.edu!linac!att!cbnewsc!cbfsb!cbnews!llh
- From: llh@cbnews.cb.att.com (lonnie.l.houck)
- Subject: Re: Static charges on 1 micro alumina powder??
- Organization: AT&T
- Date: Tue, 29 Dec 1992 15:28:10 GMT
- Message-ID: <1992Dec29.152810.6073@cbnews.cb.att.com>
- References: <1992Dec21.195127.11649@gn.ecn.purdue.edu>
- Lines: 27
-
- 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
-