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Materials, Methods & Technologies, Volume 11, 2017

METHOD FOR PREPARATION OF ION-MODIFIED CALCIUM ORTHOPHOSPHATE FINE POWDERS AND THEIR USE IN COMPOSITE MATERIALS
Rumiana Gergulova, Stefka Tepavitcharova, Kostadinka Sezanova, Diana Rabadjieva, Radost Ilieva
Pages: 168-177
Published: 29 Jul 2017
Views: 379
Downloads: 149
Abstract: Ion-modified calcium orthophosphate fine powders were prepared by a method consisting of seven steps (biomimetic precipitation, suspension gelation, lyophilization, calcination, washing, gelation, and sintering at 1000°C). They were used as the main ingredient for preparation of composite materials including various combinations of different natural polymers. The best composite material consisted of Zn-modified β-tricalcium phosphate powder/gelatin/xanthan gum/carrageenan/water in proportions 73.89/0.12/0.12/2.46/1.23/22.17 (mass %). One-month storage of the sample in SBF led to the generation of a new phase and to partial dissolution of the polymers.
Keywords: calcium orthophosphates, ion modification, composites
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