Calcium carbonate sintered body and method for producing same, and bone grafting material
AssigneeShiraishi Central Laboratories Co. Ltd.
InventorsHidero Unuma, Toshitake Furusawa, Shota Umemoto, Masahiko Tajika
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Abstract
Provided is a method for producing a calcium carbonate sintered body whereby a good sintered body can be obtained without having to use any sintering aid. A method for producing a calcium carbonate sintered body includes the steps of: compacting calcium carbonate to make a green body; heating the green body under a condition of a temperature of 500° C. or lower to remove an organic component contained in the green body; and sintering the green body under conditions of a carbon dioxide atmosphere and a temperature of 450° C. or higher to obtain a calcium carbonate sintered body.
Claims16
A calcium carbonate sintered body containing 99.5% by mass or more calcium carbonate and having an average particle diameter of 0.1 μm to 20 μm in a particle diameter distribution measured by scanning electron microscopy, a Vickers hardness of 50HV1.0 or more, and a relative density of 90% or more.
A method for producing a calcium carbonate sintered body, the method comprising the steps of:
- compacting calcium carbonate to make a green body;
- heating the green body under a condition of a temperature of 500° C. or lower to remove an organic component contained in the green body;
- and sintering the green body under conditions of a carbon dioxide atmosphere and a temperature of 500° C. or higher to obtain a calcium carbonate sintered body.
A porous calcium carbonate sintered body containing 95% by mass or more calcium carbonate and having a porosity of 10% or more and a whiteness of 85 or more.
A method for producing a porous calcium carbonate sintered body, the method comprising the steps of:
- preparing a dispersion liquid containing calcium carbonate;
- adding a foaming agent to the dispersion liquid, followed by stirring until foamy to make a foam;
- heating the foam under a condition of a temperature of 500° C. or lower to remove an organic component contained in the foam;
- and sintering the foam under conditions of a carbon dioxide atmosphere and a temperature of 450° C. or higher to obtain a porous calcium carbonate sintered body.
Dependencies are inferred from the claim text.