Yes, the problem was already reported by some colleagues in Germany and
the US as well. These customers did reclaim, but I don't know the
answers of the company. It is obvious that McCrone Ltd needs a new
supplier for more densely sintered corundum ceramics.
Reinhard Kleeberg
Mati Raudsepp schrieb:
We have been using the McCrone Micronizing mill for many years with
the pink corundum grinding elements with good results. Generally,
contamination from the grinder ranged from not detectable to a maximum
of 1-3 wt.% depending on the specimen. Most of the material we grind
is quartz/feldspar rich rock. Recently we got the new style elements
which are white, not as well finished and look slightly porous
relative to the old elements. Regrinding old specimens as a check now
gives about 7-10 wt.% contamination from the elements. McCrone admits
having complaints about the new elements but I have not had a chance
to follow up to see if there is a solution.
Have any of you McCrone users found the same problem with the new
white elements?
Mati Raudsepp, Professor (Hon.)
Director: Electron-microbeam/X-ray Diffraction Laboratory
Department of Earth & Ocean Sciences
6339 Stores Road
The University of British Columbia
Vancouver, BC V6T 1Z4
Tel: 604-822-6396
Fax: 604-822-6088
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fn:Reinhard Kleeberg
n:Kleeberg;Reinhard
org;quoted-printable:TU Bergakademie Freiberg;Institut f=C3=BCr Mineralogie
adr:;;Brennhausgasse 14;Freiberg;Sachsen;D-09596;Germany
email;internet:[EMAIL PROTECTED]
title:Dr.
tel;work:(+49) (0)3731 393244
tel;fax:(+49)(0)3731 393129
url:http://www.mineral.tu-freiberg.de/mineralogie/roelabor/
version:2.1
end:vcard
