Anti-oxidation absorbing agent and preparation method thereof

• Main Authors: LI TIANQI, XIE HUI, LU YARU, ZHOU YINGYING, YANG CHANGQING, MA LIYA, ZHANG KANGXI
• Format: Patent
• Language: Chinese; English
• Published: 24.01.2020
• Subjects: CASTING; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING; WORKING METALLIC POWDER

The invention discloses an anti-oxidation absorbing agent and a preparation method thereof. A compact Al2O3 coated carbonyl iron powder anti-oxidation absorbing agent is formed by making aluminum powder evenly adhere to the surface of carbonyl iron powder, wherein the mass fraction of the aluminum powder is 20 wt.% to 5 wt.%, the mass fraction of the carbonyl iron powder is 80 wt.% to 95 wt.%, theaverage particle size of the carbonyl iron powder is 1 micrometer to 6 micrometers, and the average particle size of the aluminum powder is 10 nanometers to 100 nanometers. Carbonyl iron/aluminum mixed powder partially alloyed mechanically is prepared firstly, controlled oxidation is conducted so that aluminum in the carbonyl iron/aluminum mixed powder partially alloyed mechanically can be oxidized, and aluminum oxide coated carbonyl iron powder is obtained; and in-situ oxidoreduction is conducted on the aluminum oxide coated carbonyl iron powder, and compact aluminum oxide coated carbonyl iron powder is prepared. Th