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 100-950 nm, microspheres 1-100 µm. Solubility in water :insoluble Solubility in organic solvents :insoluble. Specific Gravity :3.75 - 3.69 g/cm3. Crystal structure :crystalline,a-Al2O3Corundum phase Surface area :less than 2 - 3 m2/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 withplain,aminoandcarboxylfunctional 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.
Scanning Electron Microscopy image of 2.5 µm uniform plain Al2O3nanospheres
Scanning Electron Microscopy image of 635 nm uniform plain Al2O3nanospheres