MAKING METAL PARTICLES COMPRISING THE HETEROGENEOUS ING OF PRECURSORS

摘要

This invention relates to a process for making metal-bearing powders from the decomposition of organometallic salts e.g. the thermal reduction of metal oxalates to metal. It has been discovered that improved properties can be achieved in metal particles so formed by a process whereby the growth of the organometallic salt to be subjected, eventually, to thermal decomposition is initiated by use of seeds of a first salt different in chemical composition from another material to be formed thereon as the salt crystal grows. The utility of the invention resides inter alia in improving the magnetic properties of ferromagnetic metal particles and in improving the useful life of metal particles used as catalysts or as memory-retaining materials in magnetic information storing systems.