Properties of natural hydroxyapatite prepared by pressureless sintering using different temperatures and holding times
The sintering behavior of hydroxyapatite (HAp) particles prepared via pressureless sintering was investigated. The powders were subjected to different sintering temperatures of 900°C and 1000°C for 2, 4, and 6 hours (hr). The sintered HAp powders were analyzed for phase stability, density, Vickers h...
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Elsevier
2025-01-01
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| Series: | Next Nanotechnology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2949829525000373 |
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| author | Nuradeen Idris Bashar Dan-Asabe Semiyou A. Osseni Kazeem O. Rabiu Adetunji R. Sowunmi Naresh D. Bansod Frantisek Lukac Stefan Csaki David O. Obada |
| author_facet | Nuradeen Idris Bashar Dan-Asabe Semiyou A. Osseni Kazeem O. Rabiu Adetunji R. Sowunmi Naresh D. Bansod Frantisek Lukac Stefan Csaki David O. Obada |
| author_sort | Nuradeen Idris |
| collection | DOAJ |
| description | The sintering behavior of hydroxyapatite (HAp) particles prepared via pressureless sintering was investigated. The powders were subjected to different sintering temperatures of 900°C and 1000°C for 2, 4, and 6 hours (hr). The sintered HAp powders were analyzed for phase stability, density, Vickers hardness, fracture toughness, brittleness index, and in vitro biological properties. XRD analysis indicated HAp as the dominant phase in all samples. Rietveld refinement quantified the weight percent (wt.%) of HAp to be equal to or more than 97 % in all samples. Scanning electron microscopy (SEM) analyses revealed larger and flattened particle shapes for HAp sintered at 1000°C and this influenced the mechanical properties of the samples. The density of the HAp samples was close to the theoretical density of HAp. Samples sintered with 4-hr holding times displayed greater stability in physiological fluids. In vitro degradation tests in phosphate buffer saline (PBS) under physiological conditions revealed minimal weight loss and stable pH levels over 14 days. This indicates the scaffolds’ potential for long-term physiological stability. Overall, samples sintered at 900°C may be further investigated to enhance their significance in biomedical applications. |
| format | Article |
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| institution | DOAJ |
| issn | 2949-8295 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Next Nanotechnology |
| spelling | doaj-art-2b404bd18fb74d538b288d856d4b024a2025-08-20T03:23:03ZengElsevierNext Nanotechnology2949-82952025-01-01710016810.1016/j.nxnano.2025.100168Properties of natural hydroxyapatite prepared by pressureless sintering using different temperatures and holding timesNuradeen Idris0Bashar Dan-Asabe1Semiyou A. Osseni2Kazeem O. Rabiu3Adetunji R. Sowunmi4Naresh D. Bansod5Frantisek Lukac6Stefan Csaki7David O. Obada8Department of Mechanical Engineering, Ahmadu Bello University, Zaria 810222, NigeriaDepartment of Mechanical Engineering, Ahmadu Bello University, Zaria 810222, NigeriaKaba Laboratory for Research in Chemistry and Applications, Faculty of Science and Technology of Natitingou, (LaKReCA/FAST-NATI/UNSTIM), BP 266 FAST-Natitingou, BeninDepartment of Chemical Engineering, Osun State University, Osogbo 4494, NigeriaNational Universities Commission, Abuja 237, NigeriaDepartment of Chemistry, Mahatma Gandhi Arts, Science and Late N.P. Commerce College, Armori Dist, Gadchiroli, Maharashtra 441208, IndiaInstitute of Plasma Physics of the Czech Academy of Sciences, U Slovany 2525/1a, 18200 PrahaDepartment of Physics, Constantine the Philosopher University in Nitra, Tr. A. Hlinku 1, Nitra 94901, Slovakia; Department of Horticultural Machinery, Faculty of Horticulture, Mendel University in Brno, Valticka 337, LedniceDepartment of Mechanical Engineering, Ahmadu Bello University, Zaria 810222, Nigeria; Multifunctional Materials Laboratory, Department of Mechanical Engineering, and Africa Centre of Excellence on New Pedagogies in Engineering Education, Ahmadu Bello University, Zaria 810222, Nigeria; Corresponding author at: Department of Mechanical Engineering, Ahmadu Bello University, Zaria 810222, Nigeria.The sintering behavior of hydroxyapatite (HAp) particles prepared via pressureless sintering was investigated. The powders were subjected to different sintering temperatures of 900°C and 1000°C for 2, 4, and 6 hours (hr). The sintered HAp powders were analyzed for phase stability, density, Vickers hardness, fracture toughness, brittleness index, and in vitro biological properties. XRD analysis indicated HAp as the dominant phase in all samples. Rietveld refinement quantified the weight percent (wt.%) of HAp to be equal to or more than 97 % in all samples. Scanning electron microscopy (SEM) analyses revealed larger and flattened particle shapes for HAp sintered at 1000°C and this influenced the mechanical properties of the samples. The density of the HAp samples was close to the theoretical density of HAp. Samples sintered with 4-hr holding times displayed greater stability in physiological fluids. In vitro degradation tests in phosphate buffer saline (PBS) under physiological conditions revealed minimal weight loss and stable pH levels over 14 days. This indicates the scaffolds’ potential for long-term physiological stability. Overall, samples sintered at 900°C may be further investigated to enhance their significance in biomedical applications.http://www.sciencedirect.com/science/article/pii/S2949829525000373BiomaterialsDefectsCeramicsSinteringScaffolds |
| spellingShingle | Nuradeen Idris Bashar Dan-Asabe Semiyou A. Osseni Kazeem O. Rabiu Adetunji R. Sowunmi Naresh D. Bansod Frantisek Lukac Stefan Csaki David O. Obada Properties of natural hydroxyapatite prepared by pressureless sintering using different temperatures and holding times Next Nanotechnology Biomaterials Defects Ceramics Sintering Scaffolds |
| title | Properties of natural hydroxyapatite prepared by pressureless sintering using different temperatures and holding times |
| title_full | Properties of natural hydroxyapatite prepared by pressureless sintering using different temperatures and holding times |
| title_fullStr | Properties of natural hydroxyapatite prepared by pressureless sintering using different temperatures and holding times |
| title_full_unstemmed | Properties of natural hydroxyapatite prepared by pressureless sintering using different temperatures and holding times |
| title_short | Properties of natural hydroxyapatite prepared by pressureless sintering using different temperatures and holding times |
| title_sort | properties of natural hydroxyapatite prepared by pressureless sintering using different temperatures and holding times |
| topic | Biomaterials Defects Ceramics Sintering Scaffolds |
| url | http://www.sciencedirect.com/science/article/pii/S2949829525000373 |
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