Method for the manufacturing of a powdered material, the powdered material and a ceramic material manufactured there from

Method for the manufacture of a powdered material, the binder phase of which comprises a cement-based system, which powdered material has the capacity following saturation with a liquid reacting with the binder phase to hydrate to a radiopaque and chemically bonded ceramic material, characterized by the stages of:

• a) mixing raw materials for the binder phase containing Ca and Al in ratio Ca:Al greater than or equal to 1:2.4, but no greater than 3:2,
• b) physically reducing diffusions paths between atoms in the various raw materials,
• c) sintering the material at an increased temperature to form said binder phase, which comprises CaO.Al2O3 (ss) and/or 3CaO.Al2O3 (ss);
• the material in stage a and/or following stage c being brought to contain 10-55% by volume of one or more additive consisting of glass, said additive containing a non-trace amount of one or more element with a density over 5 g/cm3, expressed as the density of the element, and
• wherein said one or more element becomes present in solid solution (ss) in the binder phase, and fully or partly replaces the calcium and/or aluminium atoms in the binder phase.