title: A comparative study on the synthesis mechanism, bioactivity and mechanical properties of three silicate bioceramics.
abstract: In the present study three akermanite (Ca2MgSi2O7), diopside (CaMgSi2O6) and baghdadite (Ca3ZrSi2O9) applicable bioceramics were synthesized via a sol-gel based method. The combination of sol-gel method and the raw materials used in this study presents a new route for the synthesis of the mentioned bioceramics. By the use of thermal analysis, the mechanisms occurred during the synthesis of these bioceramics were investigated. The differences in the structural density and their relation with the degradation rate and mechanical properties of all three ceramics were studied. In vitro bioactivity and apatite formation mechanisms of the samples soaked in the simulated body fluid were considered. The results showed that baghdadite as a Zr-containing material has a more dense structure in comparison with the other ceramics, which leads to a lower degradation rate and also lower bioactivity. There were also main differences between akermanite and diopside as Mg-containing ceramics. Diopside showed a structure with lower porosity content compared to the akermanite samples which resulted in the lower degradation rate and higher compressive strength.
authors.affiliation: Advanced Materials Research Center, Department of Materials Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran.
authors.forename: Aliakbar
authors.initials: A
authors.lastname: Najafinezhad
authors.affiliation: Advanced Materials Research Center, Department of Materials Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran. Electronic address: Abdellahi@pmt.iaun.ac.ir.
authors.forename: Majid
authors.initials: M
authors.lastname: Abdellahi
authors.affiliation: Advanced Materials Research Center, Department of Materials Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran.
authors.forename: Hamid
authors.initials: H
authors.lastname: Ghayour
authors.affiliation: Advanced Materials Research Center, Department of Materials Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran.
authors.forename: Ali
authors.initials: A
authors.lastname: Soheily
authors.affiliation: Advanced Materials Research Center, Department of Materials Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran.
authors.forename: Akbar
authors.initials: A
authors.lastname: Chami
authors.affiliation: Young Researcher and Elite Club, Khomeinishahr Branch, Islamic Azad University, Isfahan, Iran.
authors.forename: Amirsalar
authors.initials: A
authors.lastname: Khandan
mesh_terms: D001672:Biocompatible Materials / Q000138:chemical synthesis / Q000737:chemistry*; D002516:Ceramics / Q000737:chemistry*; D005782:Gels / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D049329:Nanostructures / Q000737:chemistry; D017640:Silicates / Q000737:chemistry*; D012824:Silicic Acid / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D014961:X-Ray Diffraction
chemical_list: D001672:Biocompatible Materials; C000592768:Ca(3)ZrSi(2)O(9); D005782:Gels; D017640:Silicates; D012824:Silicic Acid; C074224:diopside; C023506:Glass ceramics
keywords: Bio-ceramics; Nanomaterials; Powder; Sol-gel