Powdered material and ceramic material manufactured therefrom
AssigneeDoxa Aktiebolag
InventorsLeif Hermansson, Lars Kraft, H{dot over (a)}kan Engqvist, Irmeli Hermansson, Nils-Otto Ahnfelt, Gunilla Gomez-Ortega
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Abstract
Powdered material, the binder phase of which mainly consists of a cement-based system, which powdered material has the capacity following saturation with a liquid reacting with the binder phase to hydrate to a chemically bonded ceramic material, preferably for dental purposes. According to the invention the powdered material has a composition and/or structure suitable for giving the ceramic material translucence in the hydrated state. The invention also relates to the ceramic material produced by hydration of the powdered material.
Claims18
Powdered material, the binder phase of which mainly 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 chemically bonded ceramic material, suitable for dental purposes, wherein the binder phase comprises at least mainly of calcium aluminate cement and that it further comprises one or more glass additives that have a refractive index in visible light that deviates by 15% at most from the refractive index of the binder phase when the binder phase is hydrated, a majority of particles have a size greater than 1 μm and less than 80 μm and/or less than 300 nm, the whiteness value of the binder phase being greater than 70 according to ASTM E313, the powdered material giving the chemically bonded ceramic material translucence in the hydrated state, and wherein the glass additives are present at 10-45% by volume.
Dependencies are inferred from the claim text.