| 摘要 |
The invention relates to a chromium dioxide material, consisting of needle-shaped, ferromagnetic chromium dioxide particles having a non-magnetic, hydrogenous surface protective layer, which is distinguished by an improved stability against chemical decomposition, a process for its preparation and magnetic recording material containing this chromium dioxide with high long-term climatic stability of the remanent magnetisation. |
| 申请人 |
BASF AG, 6700 LUDWIGSHAFEN, DE |
发明人 |
MUELLER, MICHAEL WOLFGANG, DR., 6831 PLANKSTADT, DE;SCHWAB, EKKEHARD, DR., 6730 NEUSTADT, DE;AUWETER, HELMUT, DR., 6703 LIMBURGERHOF, DE;FESER, RAINER, DR., 6718 GRUENSTADT, DE;HUEBNER, WERNER, 6710 FRANKENTHAL, DE;MUELLER, NORBERT, DR., 6701 FRIEDELSHEIM, DE;OHLINGER, MANFRED, DR., 6710 FRANKENTHAL, DE;DIKOW, HERMANN, DR., 6832 HOCKENHEIM, DE |
