title: Investigating the effect of SiO2-TiO 2-CaO-Na 2O-ZnO bioactive glass doped hydroxyapatite: characterisation and structural evaluation.
abstract: The effects of increasing bioactive glass additions, SiO2-TiO2-CaO-Na2O-ZnO up to 25 wt% in increments of 5 wt%, on the physical and mechanical properties of hydroxyapatite (HA) sintered at 900, 1000, 1100 and 1200 °C for 2 h was investigated. Increasing both the glass content and the temperature resulted in increased HA decomposition. This resulted in the formation of a number of bioactive phases. However the presence of the liquidus glass phase did not result in increased densification levels. At 1000 and 1100 °C the additions of 5 wt% glass resulted in a decrease in density which never recovered with increasing glass content. At 1200 °C a cyclic pattern resulted from increasing glass content. There was no direct relationship between strength and density with all samples experiencing no change or a decrease in strength with increasing glass content. Weibull statistics displayed no pattern with increasing glass content.
authors.affiliation: Inamori School of Engineering, Alfred University, Alfred, NY, USA.
authors.forename: Chokchai
authors.initials: C
authors.lastname: Yatongchai
authors.forename: Anthony W
authors.initials: AW
authors.lastname: Wren
authors.forename: Declan J
authors.initials: DJ
authors.lastname: Curran
authors.forename: Stuart
authors.initials: S
authors.lastname: Hampshire
authors.forename: Mark R
authors.initials: MR
authors.lastname: Towler
mesh_terms: D001672:Biocompatible Materials / Q000737:chemistry; D017610:Calcium Compounds / Q000737:chemistry*; D017886:Durapatite / Q000737:chemistry*; D005898:Glass / Q000737:chemistry; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D010087:Oxides / Q000737:chemistry*; D010316:Particle Size; D010710:Phosphates / Q000737:chemistry; D011208:Powders; D012822:Silicon Dioxide / Q000737:chemistry*; D017670:Sodium Compounds / Q000737:chemistry*; D013314:Stress, Mechanical; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D001672:Biocompatible Materials; D017610:Calcium Compounds; D010087:Oxides; D010710:Phosphates; D011208:Powders; D017670:Sodium Compounds; C507641:TiO2-SiO2; C009495:titanium dioxide; C096707:sodium oxide; D012822:Silicon Dioxide; D017886:Durapatite; C016538:lime; D014025:Titanium; D015034:Zinc Oxide
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