Method for preparing Raney Ni/alpha-Al2O3 through Ni2Al3/alpha- Al2O3 etching

• Main Authors: JI GENSHUN, GUO TIEMING, GAO CHANGQI, JIA JIANGANG, MA QIN
• Format: Patent
• Language: Chinese; English
• Published: 02.11.2016
• Subjects: ALLOYS; CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; METALLURGY; NANOTECHNOLOGY; PERFORMING OPERATIONS; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a method for preparing Raney Ni/alpha-Al2O3 through Ni2Al3/alpha-Al2O3 etching. The method comprises the following steps that commercially available NiO powder and Al powder are weighed according to a reaction formula that (6NiO+13Al) is equal to (3Ni2Al3+2Al2O3), and are mixed to react for 3 h; the mixed powder is placed in an SP-3 planetary ball mill to be mechanically ball-milled, wherein GCr15 is used as a grinding medium, the ball-to-powder mass ratio is 30:1, and the rotational speed of the SP-3 planetary ball mill is 400 r/min; and during the ball-milling process, the ball milling is stopped for 20 min after the mixed powder is ball-milled for 1 h, so that Ni2Al3/alpha-Al2O3 powder is obtained and taken out; and the obtained Ni2Al3/alpha-Al2O3 powder is corroded for 2 h with an NaOH solution with the weight percentage of 20%, and during the corrosion process, a reaction vessel is placed in a water bath of 70 DEG C. The Ni2Al3/alpha-Al2O3 powder is first prepared through mechanic