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The Properties of Feldspathic Dental Porcelain from Tanzanian Aluminosilicate Materials

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dc.creator Lugwisha, Esther H. J.
dc.creator Siafu, Sempeho I.
dc.date 2016-06-16T18:23:00Z
dc.date 2016-06-16T18:23:00Z
dc.date 2014-11
dc.date.accessioned 2018-03-27T08:54:32Z
dc.date.available 2018-03-27T08:54:32Z
dc.identifier Lugwisha, E.H.J. and Siafu, S.I., 2014. The properties of feldspathic dental porcelain from tanzanian aluminosilicate materials. International Journal of Development Research, 4(11), pp.2260-2265.
dc.identifier 2230-9926
dc.identifier http://hdl.handle.net/20.500.11810/2521
dc.identifier.uri http://hdl.handle.net/20.500.11810/2521
dc.description Kaolin and quartz from Pugu and feldspar from Morogoro were used to produce feldspathic dental porcelain bodies. Mineralogical results from XRD revealed the presence of kaolinite, illite, microcline and clinochlore in the kaolin samples; albite, microcline, sanidine in the feldspar samples and only silica in the quartz samples. The chemical results studies by XRF revealed the presence of BaO, SiO2, Al2O3, TiO2, Cr2O3, MnO, K2O, CaO, Cl, SO3, MgO, Na2O, and Fe2O3 in varying proportions. Particle size distribution of all the raw materials were determined and particles <63 μm were used for preparation of batches. The batches of different compositions with ranges: quartz (12-22%), feldspar (75-88%) and kaolin (3-5%) were fired at 1100, 1200 and 1250 oC, and the developed properties were tested. The physico-mechanical properties studied exhibited volumetric shrinkage between 2 and 55.17%, open porosity between 6.67 and 40.00%, water of absorption between 7.1 and 40%, bulk densty of 1.43 – 5.68 g/cm3, and compressive strength at 0.13 - 32.25 MPa. The optimal firing temperature for the best results was found to be 1250 oC. The results obtained indicate that kaolin and quartz from Pugu and feldspar from Morogoro are potential raw materials for the production of dental porcelain.
dc.language en
dc.subject Feldspathic dental porcelain
dc.subject Chemical composition
dc.subject Mineralogical and Physico-mechanical properties
dc.subject Aluminosilicates
dc.subject Tanzania
dc.title The Properties of Feldspathic Dental Porcelain from Tanzanian Aluminosilicate Materials
dc.type Journal Article, Peer Reviewed


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