| 发明名称 |
PROCESS FOR PREPARING A MAGNETIC TALCOUS COMPOSITION, AND MAGNETIC TALCOUS COMPOSITION |
| 摘要 |
A process for preparing a magnetic talcous composition including mineral particles, referred to as magnetic talcous particles, having a non-zero magnetic susceptibility, in which, during an oxidative contacting step, talcous particles chosen from the group formed from 2:1 lamellar silicates having a zero electric charge are brought into contact with particles including at least one magnetic iron oxide chosen from the group formed from magnetite and maghemite, the magnetic particles having a mean equivalent diameter of between 1 nm and 50 nm. A magnetic talcous composition including mineral particles, referred to as magnetic talcous particles, having a non-zero magnetic susceptibility, at least 20% by weight of talcous particles and at least 0.5% by weight of magnetic particles is also described. |
| 申请公布号 |
US2015008356(A1) |
申请公布日期 |
2015.01.08 |
| 申请号 |
US201214367690 |
申请日期 |
2012.12.21 |
| 申请人 |
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (C.N.R.S.) |
发明人 |
Martin Francois;Micoud Pierre;Dumas Angela;Le Roux Christophe;Gardes Emmanuel |
| 分类号 |
H01F1/01 |
主分类号 |
H01F1/01 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A process for preparing a composition, called a magnetic talcous composition, comprising mineral particles, called magnetic talcous particles, having a non-zero magnetic susceptibility, wherein, during a contacting step:
talcous particles chosen from the group formed of the 2:1 sheet silicates having a zero electric charge and a mean equivalent diameter of from 10 nm to 300 nm are contacted with particles, called magnetic particles, comprising at least one magnetic iron oxide chosen from the group formed of magnetite and maghemite, said magnetic particles having a mean equivalent diameter of from 1 nm to 50 nm. |
| 地址 |
PARIS FR |
