spherical particles - glassy carbon or phenolic resin
spherical particles - glassy carbon or phenolic resin
(OP)
Hi,
I am currently searching for a possibilty to get spherical glassy/vitreous carbon particles. I need them as a reference material for particle size analysers since glassy carbon offers a set of amazing properties. The desired particle size is between 100 and 1000 microns.
For initial test runs I got a few grams but the same supplier (HTW, Germany) is not able to provide larger quantities.
While searching for glassy carbon particles, I found a possibility to generate this material based on phenolic resin particles. So (spherical) phenolic resin particles would be an alternative.
Is there anybody who knows a potential supplier? It doesn't matter whether it is the US, Europe or Asia since it seems to be very hard to find even one feasibility.
Thanks a lot for your answers.
Best regards -
westharzer
I am currently searching for a possibilty to get spherical glassy/vitreous carbon particles. I need them as a reference material for particle size analysers since glassy carbon offers a set of amazing properties. The desired particle size is between 100 and 1000 microns.
For initial test runs I got a few grams but the same supplier (HTW, Germany) is not able to provide larger quantities.
While searching for glassy carbon particles, I found a possibility to generate this material based on phenolic resin particles. So (spherical) phenolic resin particles would be an alternative.
Is there anybody who knows a potential supplier? It doesn't matter whether it is the US, Europe or Asia since it seems to be very hard to find even one feasibility.
Thanks a lot for your answers.
Best regards -
westharzer





RE: spherical particles - glassy carbon or phenolic resin
You can get black spherical polystyrene particles in huge amounts from BJ Services who use them as proppants for oil wells.
You could get glass spheres, hollow or solid and attach dye to them to get color.
Chris DeArmitt PhD FRSC CChem
www.phantomplastics.com
Consultant to the plastics industry
RE: spherical particles - glassy carbon or phenolic resin
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
RE: spherical particles - glassy carbon or phenolic resin
RE: spherical particles - glassy carbon or phenolic resin
Regards
Pat
See FAQ731-376: Eng-Tips.com Forum Policies for tips on use of eng-tips by professional engineers &
http://eng-tips.com/market.cfm
for site rules
RE: spherical particles - glassy carbon or phenolic resin
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
RE: spherical particles - glassy carbon or phenolic resin
Just to give a little more info:
I need the particles for calibrating laser diffraction sensors. Black particles are necessary due to the theory of laser diffraction which postulates complete absorption in the ideal case. Besides being spherical, the material has to fulfill various other demands. Since they should be measured dry and wet, their density should be above 1 but smaller than 2 for instance. Additionally, they have to be robust for the dry measurement - that means they should not get crushed by particle-particle collisions.
Within the past years I did a lot of testing with a very large variety of materials. As the most important test result, glassy carbon particles turned out to be the only material being fully suitable with respect to the requirements.
I hope, the above information makes my question a little bit more transparent. Nevertheless, I am still interested in helpful answers ...
Best regards -
westharzer
RE: spherical particles - glassy carbon or phenolic resin
I can't really help with this, but I have the highest regard for Chris's advice.
Regards
Pat
See FAQ731-376: Eng-Tips.com Forum Policies for tips on use of eng-tips by professional engineers &
http://eng-tips.com/market.cfm
for site rules
RE: spherical particles - glassy carbon or phenolic resin
RE: spherical particles - glassy carbon or phenolic resin
http://www.alfa.com/en/gp140w.pgm
At one time we made vitreous carbon spheres from acrylic spheres. I was not that involved in the process and the only thing I remember is that we made PAN at around 600F and went from there to make either carbon or vitreous carbon spheres.
RE: spherical particles - glassy carbon or phenolic resin
Chris DeArmitt PhD FRSC CChem
www.phantomplastics.com
Consultant to the plastics industry