c******r
发帖数: 59 | 1 Anyone has experience in how to make porous large size silica from fine
silica powders? Simple press method does not work for me since the tap
density of formed large size silica is way too high compared with fine
powders. The target is to have marcropores formation in formed large size
silica. I am thinking to add something together with fine powders while
press; then extract (remove) the "something" out but I have very hard time
to find that "something".
Any suggestions will be appreciated! |
N********1
发帖数: 9 | |
a**r
发帖数: 224 | 3 Please check Prof. Jaroneic's recent paper in Chem Mater ASAP.
They made monolithic silica rod from silica nanoparticles by pressing. |
a**r
发帖数: 224 | 4 What's the particle size of your fine silica powders?
If big enough, you can use the gel-casting method.
Please check the following example,
http://pubs.acs.org/cgi-bin/article.cgi/cmatex/2006/18/i26/pdf/cm061531a.pdf |
c******r
发帖数: 59 | 5 Thanks...
The particles are not that fine -- d50 is around 50 microns, the low end is
about a few microns.
【在 a**r 的大作中提到】
: What's the particle size of your fine silica powders?
: If big enough, you can use the gel-casting method.
: Please check the following example,
: http://pubs.acs.org/cgi-bin/article.cgi/cmatex/2006/18/i26/pdf/cm061531a.pdf
|
c******r
发帖数: 59 | 6 Add alumina to the fine silica powders? Then how to get rid of alumina in
the end? Thanks////
【在 N********1 的大作中提到】
: Al2O3
|
