Mechanosynthesis of carbonate and lithium co-substituted hydroxyfluorapatite

نویسندگان

چکیده

The presence of fluoride, lithium and carbonate group within hydroxyapatite occurring naturally the body provides basis for investigating sintering ability co-substituted hydroxyfluorapatites nanopowders use as biomaterials. Ca10-xLix(PO4)6-x(CO3)x(OH)F nanopowders, with x equal to 0, 0.5, 1, 1.5, 2 2.5 were prepared using mechanosynthesis their extensive characterization was realized. Substitution causes contraction unit hexagonal cell along a-axis elongation c-axis, well a decrease in degree crystallinity powders, an increase amounts unreacted calcium carbonates. Crystallite sizes strains, determined by Halder & Wagner method, remain same whatever x. Spectroscopic analyses show that B-type carbonated apatite is formed. Annealing at 500 °C improves phase low percentages calcite phosphate secondary phases (x ≤ 2). Transmission electron microscopy observations untreated calcined powders consist mainly spherical nanoparticles. As-mechanosynthesized Ca9Li(PO4)5(CO3)(OH)F powder, sintered Spark Plasma Sintering, densifies temperature range 580 650 °C. crystallite size remains than untreated-powder (about 15 nm).

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ژورنال

عنوان ژورنال: Materials Research Bulletin

سال: 2022

ISSN: ['1873-4227', '0025-5408']

DOI: https://doi.org/10.1016/j.materresbull.2022.111750