High performance ceramics of cold sintered nanoscale powders

摘要

The invention refers to a process to prepare a ceramic body that comprises supplying particles of a precursor material of metallic salt wet by a liquid medium. The particles are characterized by a grain size below 600 nm, and the parent material has a solubility in the liquid medium of at least 10 -5 mol /l. A pressure of =100 MPa is applied to a temperature below 100C,Which produces a material of previously unattainable high density values at low temperatures. The invention additionally refers to a calcium carbonate ceramic material of vaterita isomorpha that has a density of material = 1,76 /cm3 and a rupture module = 30 MPa, and to a calcium phosphate ceramic material consisting of monetita isomorph with density = 2,5 /c M3 and a rupture module = 18 MPa.