发明授权
- 专利标题: Nanoscale corundum powders, sintered compacts produced from these powders and method for producing the same
- 专利标题(中): 纳米级刚玉粉末,由这些粉末制造的烧结体及其制造方法
-
申请号: US10312474申请日: 2001-07-20
-
公开(公告)号: US07022305B2公开(公告)日: 2006-04-04
- 发明人: Robert Drumm , Christian Goebbert , Kai Gossmann , Ralph Nonninger , Helmut Schmidt
- 申请人: Robert Drumm , Christian Goebbert , Kai Gossmann , Ralph Nonninger , Helmut Schmidt
- 申请人地址: DE Saarbruecken
- 专利权人: Leibniz-Institut fuer neue Materialien Gemeinnuetzige GmbH
- 当前专利权人: Leibniz-Institut fuer neue Materialien Gemeinnuetzige GmbH
- 当前专利权人地址: DE Saarbruecken
- 代理机构: Hollander Law Firm, P.L.C.
- 优先权: DE10035679 20000721
- 国际申请: PCT/EP01/08422 WO 20010720
- 国际公布: WO02/08124 WO 20020131
- 主分类号: C01F7/00
- IPC分类号: C01F7/00
摘要:
Nanoscale corundum powders are obtained by first producing an Al2O3 precursor by adding seed crystals to an aqueous solution of an aluminium compound and adding a base and then converting the Al2O3 precursor into corundum by calcination at a high temperature. Before the calcination, the salts that are present in addition to the Al2O3 precursor are separated off. The resulting product is calcined at temperatures of 700 to 975° C. and any fines that may be present are removed. The resulting corundum powders can be sintered at temperatures of ≦1200° C. to produce compacts or components of multiple layer systems.