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Developing Highly Porous Glass Microspheres via a Single-Stage Flame Spheroidisation Process

Nuzulia, N. A.; Islam, T.; Saputra, A.; Sudiro, T.; Timuda, G. E.; Mart, T.; Sari, Y. W.; Ahmed, I.


N. A. Nuzulia

T. Islam

A. Saputra

T. Sudiro

G. E. Timuda

T. Mart

Y. W. Sari


Glass microspheres are gaining attention in bone tissue engineering due to their ability to convert into hydroxyapatite-like materials, resembling the inorganic mineral of natural bone. The morphology of glass microspheres as starting material has been considered to influence the conversion rate and the resulting product where porous microspheres could promote faster conversion to hydroxyapatite than solid microspheres. This paper reports on manufacturing glass microspheres (solid and porous) using a flame spheroidisation process. The effect of various gas ratios of acetylene and oxygen on the morphological changes of glass microspheres was investigated. Irregular shaped glass particles with starting particle size ranges of 63 - 125 ?m were used as feed and delivered to a hot flame to produce solid microspheres. To manufacture porous glass microspheres via a single-stage flame spheroidisation process, calcium carbonate was utilised as a porogen and mixed with the glass particles. Solid and porous glass microspheres were successfully produced, exploring various gas ratios of 3:3, 4:7, 5:7 and 6:7 with a mean particle size range between 73 - 105 ?m. Moreover, the average pore size of 6 ?m and 9 ?m was obtained using 5:7 and 6:7 gas ratios, respectively. This single-stage flame spheroidisation process is a promising method for producing both solid and porous bioactive glass microspheres.


Nuzulia, N. A., Islam, T., Saputra, A., Sudiro, T., Timuda, G. E., Mart, T., …Ahmed, I. (2022). Developing Highly Porous Glass Microspheres via a Single-Stage Flame Spheroidisation Process. Journal of Physics: Conference Series, 2243(1), Article 012005.

Journal Article Type Article
Acceptance Date Mar 22, 2022
Online Publication Date Jun 21, 2022
Publication Date Jun 1, 2022
Deposit Date Jul 8, 2022
Publicly Available Date Jul 8, 2022
Journal Journal of Physics: Conference Series
Print ISSN 1742-6588
Electronic ISSN 1742-6596
Publisher IOP Publishing
Peer Reviewed Peer Reviewed
Volume 2243
Issue 1
Article Number 012005
Keywords General Physics and Astronomy
Public URL
Publisher URL


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