abstract
A quaternary bioactive sol-gel glass of high silica content was heat treated at different temperatures, and then wet ball milled under different balls-to-powder ratios. A total of sixteen experiments were performed to study in detail the effects of both experimental variables on the structure, morphology, particle size distributions and nitrogen adsorption isotherms. The balls-to-powder ratio exerts a tremendous influence on the final particle size distribution of the powders, while its effects on the pore volume and morphology are minimal. These structural features are mostly governed by the changes in calcination temperature. Therefore, understanding the specific roles of each experimental parameter is of paramount importance towards achieving optimum powders with the desired properties. This work sheds light on the importance of using a suitable combination of these two parameters for tuning the morphology and the granulometry of the sol-gel derived bioactive glass powders.
keywords
CALCINATION TEMPERATURE; PHOTOCATALYTIC ACTIVITY; PHASE-TRANSFORMATION; WEIGHT RATIO; BALL; MICROSTRUCTURE; PERFORMANCE; HYDROLYSIS; CERAMICS; SIZE
subject category
Materials Science
authors
Ben-Arfa, BAE; Salvado, IMM; Pullar, RC; Ferreira, JMF
our authors
Basam Abobaker Emhmed Ben-Arfa
Researcher
Isabel Margarida Miranda Salvado
Associate Professor
José Maria da Fonte Ferreira
Retired Professor
Rob Pullar
CollaboratorGroups
G4 - Renewable Materials and Circular Economy
G5 - Biomimetic, Biological and Living Materials
Projects
acknowledgements
R.C. Pullar wishes to thank the FCT Grant IF/00681/2015 for supporting this work. B. A. E. Ben-Arfa thanks FCT grant BIONANOSCULP PTDC/EPH-PAT/6281/2014 for supporting him during this work. This work was developed in the scope of the project CICECO-Aveiro Institute of Materials (Ref. FCT UID /CTM /50011/2013), financed by national funds through the FCT/MEC and when applicable co-financed by FEDER under the PT2020 Partnership Agreement.