bmays - 27-1-2013 at 09:53
I am having trouble making a ball mill that won't itself be worn down and contaminate what is being ground. I want to create micronized suspensions of
organic compounds, nothing very hard or abrasive needs to be milled. I am using a glass vial, i have tried copper BBs and chrome ball bearings. They
both dirty the water or scratch the glass vial telling me they are wearing down and creating contaminates. Maybe glass balls? Or softer airsoft type
plastic BBs?
hissingnoise - 27-1-2013 at 12:37
Glass mortar and pestle, perhaps?
Mailinmypocket - 27-1-2013 at 12:41
I have used glass beads (the ones used in sterilizers) with success in the past. They're pretty cheap too... Although as mentioned by hissingnoise,
why not use a mortar and pestle?
kingkey24 - 28-1-2013 at 06:15
you should use a plastic container and glass beads, that should lower the occurrence of wear on the vessle
bmays - 29-1-2013 at 13:51
Is incredibly clumpy in a mortar and pestle, impossible without water even in ball mill. Would take ages to get it very fine as well, a ball mill is
so easy i just leave it run for an hour and the particals are so fine it looks like milk. Will try to find some glass beads and a plastic vial.
chemrox - 29-1-2013 at 16:36
maybe a different kind of glass for either the bottle or beads? One might be borosillicate and the other soft glass. What are you mixing? Maybe we
can be of more help if you say.
bmays - 3-2-2013 at 15:55
I am milling down a water insoluble hormone to create a suspension of particles in water with tween 80 surfactant.
I think glass beads might work if they were borosilicate like you say, i am having trouble finding them. Beads from the craft store wear down over a
few hours. I have abandoned the idea. The idea now is using tungsten tig rods or tungsten carbide rods if i can find them in a polypropylene vial.
Inspired by this http://www.qclabequipment.com/MCRONEMICRONIZINGMILL.html