title: Synthesis of Si, Mg substituted hydroxyapatites and their sintering behaviors.
abstract: Si, Mg-substituted hydroxyapatites, alone and co-substituted, have been prepared to obtain biomaterials having an improved biocompatibility. From FT-IR, XRD and ICP analyses, it was confirmed that single phases of hydroxyapatite substituted by Si alone or co-substituted by Si, Mg. The XRD data indicated the absence of extra phases related to silicon and magnesium oxide or other calcium phosphate species. Si-substituted hydroxyapatite of up to 2 wt% for Si and Si, Mg co-substituted hydroxyapatite of 1 wt% for the each ion keep their original structures intact for the sintering temperatures of up to 1200 degrees C. However, it is observed that ion substitutions by an amount higher than the above ratios for each hydroxyapatite lead to destabilization of original structures of the hydroxyapatite and to the production of tricalcium phosphate and calcium phosphate silicate phases when the samples were sintered at 1100 degrees C or higher.
authors.affiliation: Korea Institute of Ceramic Engineering and Technology, Seoul 153-801, South Korea. yhkokim@kicet.re.kr
authors.forename: S R
authors.initials: SR
authors.lastname: Kim
authors.forename: J H
authors.initials: JH
authors.lastname: Lee
authors.forename: Y T
authors.initials: YT
authors.lastname: Kim
authors.forename: D H
authors.initials: DH
authors.lastname: Riu
authors.forename: S J
authors.initials: SJ
authors.lastname: Jung
authors.forename: Y J
authors.initials: YJ
authors.lastname: Lee
authors.forename: S C
authors.initials: SC
authors.lastname: Chung
authors.forename: Y H
authors.initials: YH
authors.lastname: Kim
mesh_terms: D001672:Biocompatible Materials / Q000138:chemical synthesis* / Q000737:chemistry; D018786:Bone Substitutes; D002455:Cell Division; D002460:Cell Line; D006358:Hot Temperature; D006801:Humans; D006882:Hydroxyapatites / Q000138:chemical synthesis* / Q000737:chemistry; D066298:In Vitro Techniques; D008274:Magnesium / Q000737:chemistry; D008422:Materials Testing; D008854:Microscopy, Electron; D010006:Osteoblasts / Q000166:cytology; D011208:Powders; D012825:Silicon / Q000737:chemistry; D013053:Spectrophotometry; D017550:Spectroscopy, Fourier Transform Infrared; D014961:X-Ray Diffraction
chemical_list: D001672:Biocompatible Materials; D018786:Bone Substitutes; D006882:Hydroxyapatites; D011208:Powders; D008274:Magnesium; D012825:Silicon