POLYCRYSTALLINE DIAMOND MATERIAL COMPRISING A METAL OXOANION, THE OXOANION BEING SELECTED FROM THE GROUP COMPRISING MOLYBDATES, TUNGSTATES, VANADATES, PHOSPHATES AND MIXTURES THEREOF

摘要

A polycrystalline diamond material comprises a mass of diamond particles or grains exhibiting inter-granular bonding and a binder material comprising a non-metallic catalyst material for diamond, the non-metallic catalyst material for diamond being a metal oxoanion, the oxoanion being selected from the group comprising molybdates, tungstates, vanadates, phosphates and mixtures thereof.