Effect of sintering temperatures on physical and structural properties of glass ionomer cement derived from asf based glass ceramics

Mohd Yunus, Farah Nadhirah (2022) Effect of sintering temperatures on physical and structural properties of glass ionomer cement derived from asf based glass ceramics. [Project Paper] (Submitted)

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Abstract

Glass ionomer cement (GIC) is a common restorative substance used in dentistry, particularly for restorative and luting purposes. However, research on the use of Alumino- Silicate-Fluoride (ASF) based glass ceramics produced from waste materials in the manufacture of GIC is restricted. This research's main focus is to produce GIC using ASF based glass ceramics derived from CS and SLS waste materials for calcium and silica sources. GIC was fabricated using three main components of ASF based glass ceramics, polyacrylic acid (PAA) and water based on 3:1:1 ratio. Density measurements, X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), and Field Emission Scanning Electron Microscopy (FESEM) were used to assess the physical and structural properties of GIC. The density measurement of GIC increased from Room Temperature (RT) to 600 °C. At a high sintering temperature of 700-900 °C, the density then decreased. The highest density measurement of GIC is 1.844 g/cm3 which is at 600 °C with ageing time of 21 days while the lowest density measurement of GIC is 1.585 g/cm3 which is at 900 °C with ageing time of 1 day. This is because at high sintering temperatures, anorthite (Ca(Al2Si2O8)) and mullite (Al5SiO9.5) formed. Next, FTIR revealed the presence of v4 O˗P˗O bending mode, C˗O bond properties, v3 asymmetric P˗O stretching, C˗O, and OH vibration modes. The presence of the crystal phase was confirmed by FTIR, which detected OH chemical bonding around 3400 cm-1 in the spectrum wavenumber. The development of spherical particles and agglomerated needle-like apatite crystals is revealed by FESEM morphology. In FESEM, a homogeneous spherical microstructure was discovered, which devitrified to a coarse structure at high sintering temperatures. Overall, the ASF glass ceramics samples made from waste materials were shown to be a high potential candidate for dental application.

Item Type:	Project Paper
Faculty:	Fakulti Sains
Depositing User:	Ms. ROHANA ALIAS
Date Deposited:	18 Dec 2024 08:13
Last Modified:	18 Dec 2024 08:13
URI:	http://psaspb.upm.edu.my/id/eprint/1990

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