| 摘要 |
1,137,932. Production of Ni-refractory oxide powders. SHERRITT GORDON MINES Ltd. Jan.31, 1966 [Feb.12, 1965], No.4241/66. Heading C7D. Ni-refractory oxide powders in which the oxide particles are in integral association with the Ni powder, are produced by adding insoluble refractory oxide particles (e.g. of submicron size) to a suspension of finely divided basic nickel carbonate, agitating the mixture and reacting it with hydrogen at a partial pressure thereof of at least 50 p.s.i. (e. g. 100-500 p. s. i. ) at a temperature above 40‹ C. (e.g. 95-175‹ C.). The basic nickel carbonate may be made by boiling a nickel ammine carbonate solution (e.g. produced by a leaching process) to drive off NH 3 and CO 2 the refractory oxide may be one or more oxides of Th, Y, Ce, Mg, Be, Fa, Hf, Zr, Si, U, Ti, or Al and a catalyst, such as up to 1 g/l of anthroquinone, substituted anthroquinone, benzoquinone, paphthoquinone, artho or para polyhydric phenols, tannic acid or morin, may be present during the reduction step. The powder may be used to make wrought dispension hardened strip by processes involving compaction, hot working and repeated cold working and annealing and for alloy products the powder is mixed with other metal powders such as Cu, Mo and W.
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