Satish, P.Salian, A.Hadagalli, K.Mandal, S.2026-02-042023Advances in Applied Ceramics, 2023, 122, 2, pp. 69-7817436753https://doi.org/10.1080/17436753.2023.2231701https://idr.nitk.ac.in/handle/123456789/22122The major objective of the work is to explore the mechanical properties of biphasic calcium phosphates (BCP), a biomaterial derived from marine resources like prawn (Fenneropenaeus Indicus) shell biowaste through wet chemical treatment of CaO. We report the BCP, a mixture of hydroxyapatite and octa calcium phosphate from prawn shell biowaste using wet chemical synthesis at 80°C under pH 10. XRD of BCP revealed the coexistence of secondary phases like β-TCP and α-TCP along with HA upon sintering at different temperatures. Furthermore, the SEM and EDS opened well-sintered uniaxial grains and the presence of trace elements like Fe, Mg, Si, and Na. The specimens sintered at 1100°C showed the highest compression strength of 56.8 MPa due to MgO at the grain boundaries, which plays an important role in grain boundary diffusion. Therefore, the prawn shell biowaste-derived BCP has good mechanical properties, making them suitable materials for high-strength bone substitutes. © 2023 Institute of Materials, Minerals and Mining. Published by Taylor & Francis on behalf of the Institute.Calcium phosphateCompressive strengthExtrusionGrain boundariesHydroxyapatiteMagnesiaMarine biologyShellfishShells (structures)Trace elementsTransmission control protocolBiowastesBiphasic calcium phosphatesCompression strengthMarine resourcesPrawn shellsStructural characteristicsTri-calcium phosphatesWet chemical synthesisWet chemical treatmentXRDSintering