http://ojs.omniscient.sg/index.php/amst <p><em>Advanced Materials Science and Technology </em>(Print ISSN: 2717-526X&nbsp; Online ISSN: 2810-9155) is a peer-reviewed open access journal published semi-annual by Omniscient Pte. Ltd. The journal covers the properties, applications and synthesis of new materials related to energy, environment, physics, chemistry, engineering, biology and medicine, including ceramics, polymers, biological, medical and composite materials and so on. Original article, Review, Report and Communication are encouraged. <em>Advanced Materials Science and Technology</em>&nbsp;aims to disseminate the latest progress in advanced materials such as nanomaterials, carbon-based materials, organic optoelectronic materials, metallic materials and functional materials and to promote the understanding of the use of materials in energy, environment, physics, chemistry, engineering, biology and medicine.&nbsp;This journal will be useful for professionals in the various branches of materials science and for students and academic staff concerned with the related specialties.</p> Omniscient Pte. Ltd. en-US Advanced Materials Science and Technology 2717-526X <p>Copyright on any open access article in a journal published by Omniscient Pte. Ltd. is retained by the authors.&nbsp;Authors grant Omniscient Pte. Ltd. a license to publish the article and identify itself as the original publisher.&nbsp;Authors also grant any third party the right to use the article freely as long as its integrity is maintained and its original authors, citation details and publisher are identified.&nbsp;The <a href="https://creativecommons.org/licenses/by/4.0/"><u>Creative Commons Attribution-NonCommercial 4.0 International License</u></a>&nbsp;formalizes these and other terms and conditions of publishing articles.</p> http://ojs.omniscient.sg/index.php/amst/article/view/47448 <p>The study focused on investigating the properties of composites made from natural hydroxyapatite (HAp, Ca₁₀(PO₄)₆(OH)₂) sourced from tilapia fish bones (<em>Oreochromis niloticus</em>) and niobium pentoxide (PNb, Nb₂O₅). The effects of PNb concentration and sintering temperature were examined. Composites were created using a constant pressure of 450 MPa following the formula (100-x)HAp + (x)PNb, with x varying in increments of 10%, and then sintered at temperatures ranging from 700 to 1300 °C. X-ray diffraction (XRD) analysis showed the formation of new phases based on the PNb concentration and temperature. Rietveld refinement confirmed a strong fit with experimental data, supporting the accuracy of the model parameters. Fourier Transform Infrared Spectroscopy with Photoacoustic Detection (FTIR-PAS) revealed the disappearance of the OH^-&nbsp;functional group at 3572 cm^-¹. Raman spectroscopy results were consistent with XRD findings. Scanning Electron Microscopy (SEM) showed complex microstructures influenced by composition, sintering temperature, and phase interactions, with liquid-phase sintering contributing to microstructural changes. Energy Dispersive X-ray Spectroscopy (EDS) provided semiquantitative analysis, detecting the primary elements Ca, P, and Nb, along with smaller amounts of Mg and Na. The Vickers Hardness (VH) measurements indicated that PNb concentration significantly affects the mechanical properties of the composite. The study suggests that HAp/PNb composites, influenced by temperature and PNb concentration, hold great potential for use in orthopedic and dental biomaterials.</p> José Adauto da Cruz Rogério Ribeiro Pezarini Stephen Rathinaraj Benjamin Rogério Ribeiro Pezarini Paulo Maria de Oliveira Silva Antonio Jefferson Mangueira Sales Fernandes GraçaManuel Pedro Copyright (c) 2025 José Adauto da Cruz, Rogério Ribeiro Pezarini, Stephen Rathinaraj Benjamin, Rogério Ribeiro Pezarini, Paulo Maria de Oliveira Silva, Antonio Jefferson Mangueira Sales, Fernandes GraçaManuel Pedro https://creativecommons.org/licenses/by-nc/4.0 2025-03-17 2025-03-17 7 1 10.37155/2717-526X-71-47448