Pengaruh suhu sinteran terhadap kebioaktifan wolastonit daripada abu sekam padi dan batu kapur

Translated title of the contribution: Influence of sintering temperature on the bioactivity of wollastonite derived from rice husk ash and limestone

Farah Atiqah Abdul Azam, Hamisah Ismail, Roslinda Shamsudin, Min Hwei Ng, Zalita Zainuddin, Muhammad Azmi Abdul Hamid

Research output: Contribution to journalArticle

Abstract

The aim of this work was to identify the sintering effect on the in vitro bioactivity of the synthesized wollastonite material using sol gel method. Rice husk ash and calcium oxide from limestone were taken as a precursor to produce wollastonite. Calcium oxide and silicon dioxide CaO/SiO2 were measured at an average ratio of 55:45 and placed in an autoclave at the temperature of 135°C with 0.26 MPa pressure for 8 h. The CaO and SiO2 powder mixtures have been sintered at different temperatures (1150°C and 1250°C) and then immersed in a simulated body liquid (SBF) solution for 1,3,5,7 and 14 days for in vitro bioactivity test. The physical properties and wolastonite bioactivity before and after immersed in SBF solution and some characterizations were carried out using XRD, FESEM, EDX and FTIR analysis techniques. The autoclaved CaO-SiO2 powder mixture sintered at 1250°C yields a single peak of pseudowolastonite. The bioactivity test showed that, the amorphous layer of calcium phosphate (ACP) with the Ca/P ratio of 1.9-2.01 was formed faster on wolastonite samples sintered at 1250°C compared to the formation of ACP layer for sample sintered at 1150°C.

Original languageMalay
Pages (from-to)819-827
Number of pages9
JournalSains Malaysiana
Volume47
Issue number4
DOIs
Publication statusPublished - 1 Apr 2018

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Ashes
Bioactivity
Limestone
Sintering
Calcium phosphate
Lime
Powders
Temperature
Autoclaves
Sol-gel process
Energy dispersive spectroscopy
Physical properties
Silica
Liquids

ASJC Scopus subject areas

  • General

Cite this

Pengaruh suhu sinteran terhadap kebioaktifan wolastonit daripada abu sekam padi dan batu kapur. / Azam, Farah Atiqah Abdul; Ismail, Hamisah; Shamsudin, Roslinda; Ng, Min Hwei; Zainuddin, Zalita; Abdul Hamid, Muhammad Azmi.

In: Sains Malaysiana, Vol. 47, No. 4, 01.04.2018, p. 819-827.

Research output: Contribution to journalArticle

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