In the present invention, slurry is formed by mixing noble metal-supported powder particles (3) and a binder (4) with each other in a liquid (Step S1), and the noble metal-supported powder particles (3) are dispersed by applying vibrations to the slurry (Step S2), and thereafter, the slurry is spray
In the present invention, slurry is formed by mixing noble metal-supported powder particles (3) and a binder (4) with each other in a liquid (Step S1), and the noble metal-supported powder particles (3) are dispersed by applying vibrations to the slurry (Step S2), and thereafter, the slurry is spray dried while keeping a state where the noble metal-supported powder particles (3) are dispersed (Step S3), whereby noble metal-supported powder (1) is produced. In the noble metal-supported powder (1) produced by such a method, pores through which exhaust gas flows are formed appropriately, and accordingly, exhaust gas purification performance can be enhanced.
대표청구항▼
1. A method of producing noble metal-supported powder, comprising: preparing a mixed slurry by mixing noble metal-supported powder particles and a binder with each other in a liquid; anddispersing the noble metal-supported powder particles by applying vibrations to the mixed slurry, and thereafter,
1. A method of producing noble metal-supported powder, comprising: preparing a mixed slurry by mixing noble metal-supported powder particles and a binder with each other in a liquid; anddispersing the noble metal-supported powder particles by applying vibrations to the mixed slurry, and thereafter, spray drying the mixed slurry while keeping a state where the noble metal-supported powder particles are dispersed,wherein degree of dispersion of the noble metal-supported powder particles in the slurry is set at 33% or more by applying the vibrations to the slurry. 2. A method of producing noble metal-supported powder, comprising: preparing a mixed slurry by mixing noble metal-supported powder particles and a binder with each other in a liquid; anddispersing the noble metal-supported powder particles by applying vibrations to the mixed slurry, and thereafter, spray drying the mixed slurry while keeping a state where the noble metal-supported powder particles are dispersed,wherein, as the binder, one containing inorganic oxide as a main component, in which a mean particle diameter is within a range from 1/10 to 10 times a mean particle diameter of the noble metal-supported powder particles, is used, anda mixing ratio of the noble metal-supported powder particles and the binder is set within a range from 10:90 to 90:10. 3. A method of producing noble metal-supported powder, comprising: preparing a mixed slurry by mixing noble metal-supported powder particles and a binder with each other in a liquid; anddispersing the noble metal-supported powder particles by applying vibrations to the mixed slurry, and thereafter, spray drying the mixed slurry while keeping a state where the noble metal-supported powder particles are dispersed,wherein Ce-containing oxide powder particles are added to and mixed with the mixed slurry before the vibrations are added thereto. 4. A method of producing noble metal-supported powder, comprising: preparing a mixed slurry by mixing noble metal-supported powder particles and a binder with each other in a liquid; anddispersing the noble metal-supported powder particles by applying vibrations to the mixed slurry, and thereafter, spray drying the mixed slurry while keeping a state where the noble metal-supported powder particles are dispersed,wherein the spray drying is performed under a condition where moisture of liquid droplets of the mixed slurry with a diameter of 1 mm or less is evaporated with 1 second per piece of the liquid droplets.
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