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Influence of Si substitution on the reactivity of α-tricalcium phosphate
Bioceramics Laboratory, Science and Technology Institute, UNIFESP, 12231-280 São José dos Campos, SP, Brazil.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Microsystems Technology. (MST/EMBLA)ORCID iD: 0000-0001-7462-4236
Bioceramics Laboratory, Science and Technology Institute, UNIFESP, 12231-280 São José dos Campos, SP, Brazil.
Department of Ceramics, Institute of Ceramics and Glass (ICV), CSIC, Kelsen 5, 28049 Madrid, Spain.
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2017 (English)In: Materials science & engineering. C, biomimetic materials, sensors and systems, ISSN 0928-4931, E-ISSN 1873-0191, Vol. 75, 816-821 p.Article in journal (Refereed) Published
Abstract [en]

Silicon substituted calcium phosphates have been widely studied over the last ten years due to their enhanced osteogenic properties. Notwithstanding, the role of silicon on α-TCP reactivity is not clear yet. Therefore, the aim of this work was to evaluate the reactivity and the properties of Si-α-TCP in comparison to α-TCP. Precursor powders have similar properties regarding purity, particle size distribution and specific surface area, which allowed a better comparison of the Si effects on their reactivity and cements properties. Both Si-α-TCP and α-TCP hydrolyzed to a calcium-deficient hydroxyapatite when mixed with water but their conversion rates were different. Si-α-TCP exhibited a slower setting rate than α-TCP, i.e. kSSA for Si-TCP (0.021 g·m− 2·h− 1) was almost four times lower than for α-TCP (0.072 g·m− 2·h− 1). On the other hand, the compressive strength of the CPC resulting from fully reacted Si-α-TCP was significantly higher (12.80 ± 0.38 MPa) than that of α-TCP (11.44 ± 0.54 MPa), due to the smaller size of the entangled precipitated apatite crystals.

Place, publisher, year, edition, pages
2017. Vol. 75, 816-821 p.
Keyword [en]
α-Tricalcium phosphate, Calcium phosphate cement, Kinetics, Silicon
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:uu:diva-316565DOI: 10.1016/j.msec.2017.02.099OAI: oai:DiVA.org:uu-316565DiVA: diva2:1078252
Available from: 2017-03-03 Created: 2017-03-03 Last updated: 2017-03-09Bibliographically approved

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Available from 2019-06-01 00:00

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