resumo
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.
palavras-chave
CALCINATION TEMPERATURE; PHOTOCATALYTIC ACTIVITY; PHASE-TRANSFORMATION; WEIGHT RATIO; BALL; MICROSTRUCTURE; PERFORMANCE; HYDROLYSIS; CERAMICS; SIZE
categoria
Materials Science
autores
Ben-Arfa, BAE; Salvado, IMM; Pullar, RC; Ferreira, JMF
nossos autores
Basam Abobaker Emhmed Ben-Arfa
Investigador
Isabel Margarida Miranda Salvado
Professor associado
José Maria da Fonte Ferreira
Professor(a) Jubilado(a)
Rob Pullar
ColaboradorGrupos
G4 - Materiais Renováveis e Economia Circular
G5 - Materiais Biomiméticos, Biológicos e Vivos
Projectos
agradecimentos
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.