| 摘要 |
<p>A method for producing a platinum material reinforced with dispersed oxide, which comprises adding powdered platinum into water to prepare a platinum suspension, admixing the platinum dispersion with a zirconium nitrate solution and a urea solution, adjusting the mixed solution to a predetermined pH value to precipitate zirconium hydroxide, thereby forming a platinum carrying zirconium hydroxide, preparing a formed product from the platinum carrying zirconium hydroxide, subjecting the formed product to a sintering treatment and a forging treatment under conditions wherein the secondary recrystallization of platinum crystals proceeds, to form a platinum ingot, and subjecting the platinum ingot to a cold rolling treatment at a rolling reduction of 70 % or more, followed by a recrystallization heat-treatment. The method allows more fine dispersion of zirconium oxide into a platinum material and thus the production of a platinum material reinforced with dispersed oxide having improved creep strength characteristics.</p> |
