| 摘要 |
Processes are described for coating a particulate silver material such as sand or diatomaceous earth with metallic silver for sterilizing water and the like, the objective being to produce a highly adherent, thin layer of silver on the diatom surfaces. One method comprises mixing the filter particles with a silver compound in solution, then reducing the silver to elemental form on the particle surfaces by chemical, optical, or gaseous means with or without the addition of heat. Another method comprises sputtering elemental silver on to the diatom particle surfaces in a partial vacuum or inert atmosphere.
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