Abstract
In this study, nanocomposites with different contents of borosilicate glass (BG) and carbonated hydroxyapatite (CHA) were mixed, ground and sintered at 750 °C. In order to examine their phase composition, molecular structure and microstructure, x-ray diffraction (XRD) technique, Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM), respectively were used. Moreover, the DC electrical conductivity and physical and mechanical properties of the prepared nanocomposites were measured. In addition, the in vitro bioactivity of the sintered samples was evaluated using XRD and SEM. Unexpectedly; the results indicated that the successive increase in BG contents promoted the partial decomposition of CHA at this lower sintering temperature. Also, it was responsible for the enhanced bioactivity behavior along with giving CHA better mechanical properties whereby microhardness, compressive strength, and Young’s, elastic, bulk and shear moduli were improved even 50, 40, 85, 81.81, 78.5 and 77.27%, respectively. In addition, the density of these nanocomposites was enhanced to 31.03%. However, the electrical conductivity of the examined samples exhibited an opposite trend where it decreased by 87.3% with the increase of the BG content to 32 wt%. According to the results obtained, the prepared samples are suitable for use in various biomedical applications.
Highlights
There is a great demand for the continuous development of new prostheses as a result of the tremendous improvements in medicine which have increased the life span of people all over the world [1]
Unexpectedly; the results indicated that the successive increase in borosilicate glass (BG) contents promoted the partial decomposition of carbonated hydroxyapatite (CHA) molecules at this lower sintering temperature
On the other hand, carbonated hydroxyapatite (CHA) nanopowders were prepared following the mechanochemical synthesis method described in our recent articles
Summary
There is a great demand for the continuous development of new prostheses as a result of the tremendous improvements in medicine which have increased the life span of people all over the world [1]. In this regard, this goal can be achieved through many biomaterials such as various metals and their alloys, bioactive glasses, glass-ceramics, calcium phosphates and calcium silicates. In the past few decades, biomaterials have been considered as a hotspot for research as they require many factors that cannot be met One of these important factors is their electrical properties as they are very useful in relieving pain and improving the quality of life. On the basis of these facts, the researchers believe that bioactive materials such as bioglasses/calcium phosphate compounds are potential candidates for achieving this goal [4]
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