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7 June 2024 Phase transition in hydroxyapatites: bone and laser host materials
Himagowri Prasad, Aria Tauraso, Krishna S. Machuga, Tagide deCarvahlo, Brian Cullum, Fow-Sen Choa, Brad Arnold, K. D. Mandal, N. B. Singh
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Proceedings Volume PC13059, Smart Biomedical and Physiological Sensor Technology XXI; PC1305901 (2024) https://doi.org/10.1117/12.3013182
Event: SPIE Defense + Commercial Sensing, 2024, National Harbor, Maryland, United States
Abstract
The properties of synthetically hydroxyapatites are significantly affected by chemical or radiological exposures making these materials good sensors. Since early sixties hydroxyapatites single crystals have been investigated for sensors and laser host applications. Hydroxyapatites are naturally occurring mineral calcium apatite with the formula Ca5(PO4)6(OH)2 . When the OH− ion is replaced by halides (F, Cl) and carbonate these are referred as haloapatites such as fluorapatite and chlorapatite. These materials generally belong to hexagonal symmetry. Most of the times naturally occurring apatite contain impurities and instead of transparent white these appear to be brown, green or yellow. Recently it has been realized that major portion of the body bone is some form of hydroxyapatite. We have studied several compositions of hydroxyapatites and synthesized by using nanoparticles of parent components and developed growth by sintering and grain growth. We observed that during grain growth hexagonal morphology is formed which changes to glassy phase depending on the cooling conditions and compositions.
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Himagowri Prasad, Aria Tauraso, Krishna S. Machuga, Tagide deCarvahlo, Brian Cullum, Fow-Sen Choa, Brad Arnold, K. D. Mandal, and N. B. Singh "Phase transition in hydroxyapatites: bone and laser host materials", Proc. SPIE PC13059, Smart Biomedical and Physiological Sensor Technology XXI, PC1305901 (7 June 2024); https://doi.org/10.1117/12.3013182
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KEYWORDS
Bone
Laser applications
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