2024-03-29T05:51:56Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/57342023-03-31T12:00:24Zcom_10259_4759com_10259_2604col_10259_4760
A comprehensive study on compositional and structural changes in 45S5 bioglass products exposed to simulated body fluid
Montinaro, Selena
Desogus, Luca
Orrù, Roberto
Garroni, Sebastiano
Delogu, Francesco
Ricci, Pier Carlo
Cao, Giacomo
bioactive glasses
in vitro test
Rietveld method
spark plasma sintering
Materiales
Ensayos (Tecnología)
Materials
Testing
The interaction of fully dense 45S5‐bioglass derived samples produced by Spark Plasma Sintering (SPS) with simulated body fluid (SBF) solution was investigated in detail taking advantage of the Rietveld refinement method to quantitatively evidence the corresponding microstructural and compositional changes. It is observed that, when the original amorphous nature is mostly (75 wt%) preserved in the material during sintering (550°C, 2 minutes), the resulting specimens dissolve faster and determine relatively higher pH increase and ions release in the SBF solution. Correspondingly, a relatively lower amount of hydroxycarbonate apatite (HCA) is formed on their surface. In contrast, a more extensive apatite layer with trabecular structure is generated within 3 days storage on the surface of fully crystallized samples obtained at 600°C by SPS, which only consists of Na–Ca silicate grains (20 nm). Moreover, as the sintering temperature and dwell time were increased to 700°C and 20 minutes, respectively, a rhenanite‐like phase was also formed (about 15 wt%), other than crystallites growth to 90 nm. Interestingly, the presence of rhenanite provides a beneficial contribution for the production of the HCA layer, which was found the largest for this system when considering storage periods of 7 and 14 days, respectively.
Regione Autonoma della Sardegna (Italy). Grant Number: CUP n. F71J11001070002
2021-04-27T08:52:46Z
2021-04-27T08:52:46Z
2018-01
info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
0002-7820
http://hdl.handle.net/10259/5734
10.1111/jace.15199
eng
Journal of the American Ceramic Society. 2018, V. 101, n. 1, p. 116-130
https://doi.org/10.1111/jace.15199
info:eu-repo/grantAgreement/Regione Autonoma della Sardegna/F71J11001070002
info:eu-repo/semantics/openAccess
application/pdf
Wiley
https://riubu.ubu.es/bitstream/10259/5734/3/Montinaro-jacs_2018.pdf.jpg
Hispana
TEXT
http://rightsstatements.org/vocab/CNE/1.0/
RIUBU. Repositorio Institucional de la Universidad de Burgos
http://hdl.handle.net/10259/5734