|
We
are only supplier of truly uniform and monodisperse alumina ( aluminum
oxide) microspheres and nanospheres.
Our alumina nanospheres and microspheres have
been used in various applications due to
-
the size uniformity
-
the high degree of particle sphericity (as
result, high flowability and high packing density)
-
properties of alumina, such as high thermal
conductivity, heat resistance, hardness etc.
These particles often used as a fillers with
high thermal conductivity, for example, those fillers for thermal
conductivity sheets
Properties of alumina
microspheres and nanospheres:
Size: nanospheres 100-950nm, microspheres
1-100µm.
Solubility in water:
insoluble
Solubility in organic solvents: insoluble.
Specific Gravity:
3.75-3.69g/cm3.
Crystal structure:
crystalline, α-Al2O3 Corundum phase
Surface area: less
than 2-3m2/g, non-porous
Surface charge: positive (pH≤9.3)
and negative (pH≥9.3).
While
the polymer and silica microparticles have been commonly used due to
Functional surface
alumina microspheres and nanospheres:
Currently we offer alumina microspheres and nanospheres with
plain, amino
and carboxyl functional groups. The alumina
microspheres and nanospheres are also available on custom synthesis basis with
other functional groups such as albumin, protein A, epoxy, NHS, NTA, EDTA et others. Please ask for
delivery time and quotation.
They are useful for coupling of DNA, oligonucleotides, oligopeptides,
proteins, lectines and antibodies.
Dyed and fluorescent
alumina microspheres and nanospheres:
Currently not available
Doped with other elements
alumina microspheres and nanospheres:
On custom synthesis basis we can dope these
microparticles selected other elements with up to 2 %. The doped elements
could be distributed uniformly, internally or externally.
|
