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<p>The biological and mechanical characteristics of a material used in biomedical applications depend on its chemical composition, while its surface properties are significantly influenced by the synthesis route. This study investigates the impact of chemical structure and surface properties on the bioactivity and mechanical stability of tertiary silicate bioceramics (akermanite and merwinite). Citric acid, used as a fuel in combination with the sol–gel combustion method, effectively reduced the synthesis time and temperature for these bioceramics. The formation of akermanite and merwinite phases was confirmed through X-ray diffraction (XRD) analysis, while microscopic analysis revealed a porous surface morphology. Among the two bioceramics, akermanite exhibited superior mechanical strength, whereas merwinite demonstrated lower mechanical values than human cortical bone. However, merwinite displayed a considerably higher apatite-forming ability than akermanite, achieving complete surface coverage within seven days of immersion in simulated body fluid (SBF). Furthermore, the study highlights that the bioactivity and mechanical strength of these silicate ceramics are closely linked to their dissolution and degradation behavior.</p>

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Investigation of sol–gel combustion derived akermanite and merwinite for its physicochemical and biomechanical properties

  • 期刊论文

  • 发表日期：

    2025年5月22日

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  • Senthil Kumar Venkatraman,
  • Naveensubramaniam Vijayakumar,
  • Sasikumar Swamiappan

摘要

The biological and mechanical characteristics of a material used in biomedical applications depend on its chemical composition, while its surface properties are significantly influenced by the synthesis route. This study investigates the impact of chemical structure and surface properties on the bioactivity and mechanical stability of tertiary silicate bioceramics (akermanite and merwinite). Citric acid, used as a fuel in combination with the sol–gel combustion method, effectively reduced the synthesis time and temperature for these bioceramics. The formation of akermanite and merwinite phases was confirmed through X-ray diffraction (XRD) analysis, while microscopic analysis revealed a porous surface morphology. Among the two bioceramics, akermanite exhibited superior mechanical strength, whereas merwinite demonstrated lower mechanical values than human cortical bone. However, merwinite displayed a considerably higher apatite-forming ability than akermanite, achieving complete surface coverage within seven days of immersion in simulated body fluid (SBF). Furthermore, the study highlights that the bioactivity and mechanical strength of these silicate ceramics are closely linked to their dissolution and degradation behavior.