Fluoroaluminosilicate glass was prepared from recycled low alumina glass, with the additions of AlF3 and CaF. That was to provide a cheap source of proper glass required to prepare glass ionomer cement GIC. Three batches of the fluoroaluminosilicate glass were prepared with different additions of CaF varied at the expense of AlF3. i.e., the glass was prepared with three different CaO contents. The prepared glasses were used as an essential part of GICs. It was found that a crystalline phase (fluorapatite) appeared as part of the set cement matrix. The XRD of the set cements indicated that the crystalline fluorapatite increases with the increase of the CaO content of the starting fluoroaluminosilicate glass. The increase of the CaO content also led to an increase in the density of the set cement and its compressive strength. In addition, the working and setting times were increased too. Finally, the set cements where shown bioactive.
Al-Tae'e, Sura S.; Almitwalli, Ola M.; and Farid, Saad B. H.
"Preparation of Glass Ionomer Cement from Recycled Low Alumina Glass,"
Karbala International Journal of Modern Science: Vol. 6
, Article 5.
X-ray diffraction pattern of the prepared fluoroaluminosilicate glass.
Fig. 2.pdf (112 kB)
X-ray diffraction pattern for the set cement #1.
Fig. 3.pdf (112 kB)
X-ray diffraction pattern for the set cement #2.
Fig. 4.pdf (110 kB)
X-ray diffraction pattern for the set cement #3.
Fig. 5.pdf (35 kB)
Density of the set cements as a function of CaO content.
Fig. 6.pdf (35 kB)
Compressive Strength of the set cements as a function of CaO content.
Fig. 7.pdf (38 kB)
The temperature rise of the cements during the setting reaction.
Fig. 8.jpg (2018 kB)
SEM micrographs for the fracture surfaces of the set cements. (a), (b), (c): for cement #1, #2, and #3 respectively before exposing to SBF solution. (d), (e), (f): after exposing to SBF solution for one week.
Fig. 9.jpg (2572 kB)
The set cement samples dipped in SBF solution for one week, a, b. A precipitate has appeared in the vicinity of the samples.
Fig. 10.pdf (83 kB)
X-ray diffraction pattern of the dried precipitate shown in figure 9.
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