发明名称 |
Production method of high strength polycrystalline ceramic spheres |
摘要 |
A method for making hollow spheres of alumina or aluminate comprises: coating polymeric beads with an aqueous solution of an alumoxane, drying the beads so as to form an alumoxane coating on the beads; heating the beads to a first temperature that is sufficient to convert the alumoxane coating to an amorphous alumina or aluminate coating and is not sufficient to decompose the polymeric beads; dissolving the polymeric bead in a solvent; removing the dissolved polymer from the amorphous alumina or aluminate coating; and heating the amorphous alumina or aluminate coating to a second temperature that is sufficient to form a hollow ceramic sphere of desired porosity and strength. The hollow spheres can be used as proppants or can be incorporated in porous membranes.
|
申请公布号 |
US7220454(B2) |
申请公布日期 |
2007.05.22 |
申请号 |
US20040774319 |
申请日期 |
2004.02.06 |
申请人 |
WILLIAM MARSH RICE UNIVERSITY |
发明人 |
BARRON ANDREW R.;DEFRIEND KIMBERLY A. |
分类号 |
B05D3/02;B01D71/02;B01J;B01J13/02;B32B5/16;C04B28/24;C04B35/628;C04B38/00;C09K8/80 |
主分类号 |
B05D3/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|