Mohamad Juoi, Jariah
(2000)
Kesan nisbah mol CaO/P2O5 ke atas penghabluran kaca kalsium fosfat.
Masters thesis, Universiti Sains Malaysia.
Abstract
Kesan nisbah mol CaO/PzOs ke atas penghabluran kaca kalsium fosfat merupakan suatu
kajian awal ke atas sistem kaca berkenaan. Sistem kaca ini menjadi semakin penting dan
menarik untuk dikaji berikutan keupayaannya bertindak sebagai bahan bioseramik. Kajian
telah dimulakan dengan kerja-kerja penghasilan kaca kalsium fosfat dengan empat
komposisi teori nisbah mol Ca0/P20 5 iaitu 0.85, 0.95, 1.10 dan 1.20. Hasil peleburan
kemudiannya dianalisis menggunakan analisis pembelauan sinar-X (XRD), analisis
pendafluor sinar-X (XRF) dan analisis terma pembezaan (DTA). Seterusnya, seramik kaca
kalsium fosfat dihasilkan melalui proses olahan haba pada suhu 600°C. Dua tempoh
olahan haba telah digunakan iaitu 24 jam dan 48 jam. Sementara itu, dua kadar kenaikan
suhu (1 0°C/min dan 2°C/min) semasa olahan haba turut diselidiki kesannya ke atas
penghabluran kaca kalsium fosfat.
The effect of the CaO to P205 mole ratio on the crystallisation of Calcium phosphate glass
is the first study based on the Ca0/P205 glass system. The investigation on this system is
of interest due to its capability to be used as a bioceramic material. In the first stage of the
research, phosphate glasses with theoretical composition of 0.85, 0.95, 1.10 and 1.20 mol
ratios were produced. Then, they were analysed using X-ray diffraction (XRD), X-ray
fluorescent (XRF) and differential thermal analyses (DTA). Next, they were heat-treated at
600°C for 24 hours and 48 hours to produce calcium phosphate glass ceramic. The effects
of two different rates of temperature increase on the crystallisation of calcium phosphate
glass were investigated during this process.
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