Document Type : Research Paper


Materials Engineering Dept., University of Technology-Iraq, Alsina’a street, 10066 Baghdad, Iraq.


In this study, a novel bioceramic material with improved mechanical properties was prepared to be consentient with the mechanical requirements of living bodies. Cordierite was synthesized via the sintering method at 1400 °C, based on a composition of 51.4% silica, 34.8% of alumina, and 13.8% magnesia. The composition of precursor materials was studied using wet chemical analysis. Three different compositions of the cordierite (30, 40, and 50 wt.%) were incorporated in hydroxyapatite and then sintered at 700, 900, and 1100 °C. To visualize the characteristics of all prepared materials, scanning electron microscopy (SEM) and X-ray diffraction (XRD) were analyzed. The crystallite size was determined from XRD patterns using the Scherrer equation. Microhardness was investigated using (a digital micro hardness tester), while the compressive strength was tested using a microcomputer-controlled electronic universal testing machine (WDW-5E). The modulus of elasticity was determined from the stress-strain curve. As a result, all samples which contain cordierite powder have considerable mechanical properties as compared to the control sample. The incorporation of cordierite caused a slight increase in grain size at all sintering temperatures. Among all ratios, the second mixture, which includes 40% cordierite showed the best mechanical properties at all sintering temperatures. The percentage of 40% cordierite led to increasing the compressive strength of HA by 126.27% at 700 °C, 61.52% at 900 °C, and 123.05% at 1100 °C. On the other hand, the effect of this cordierite level on hardness increased by 94.04% at 700 °C, 141.29% at 900 °C, and 128.44% at 1100 °C. The values of elasticity modulus ranged between 15-37 GPa, i.e. consistent with that of cortical bone. 

Graphical Abstract


  • The incorporationof cordierite caused a slight increase in grain size at all sintering temperatures.
  • At 1100 °C, 30% cordierite increased the compressive strength of HA by 116.23% at 700 °C, 57.80% at 900 °C, and 94.34 % at 1100 °C.
  • The effect of the cordierite on hardness was increased by 6.09% at 700 °C, 108.71% at 900°C, and 66.59 % at 1100 °C.


Main Subjects

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