Toughening of Dental Ceramic Core Materials
Atef Shaker Ibrahim;
Abstract
The principle aim of this investigation was to prepare three ceramic core materials from the different sources based on pure alumina powder namely o.- alumina, magnesium aluminate spinel and alumina + 3% Yttria partially stabilized zirconia. Properties of processed specimens following the In Ceram manufacturing procedures (Melt infiltration technology), were determined in an attempt of future clinical application prediction of these materials.
A hundred and eighty four total specimens were prepared from the characteristic slip consistency of different materials.
Specially designed molds were constructed in order to prepare the study specimens, which underwent several investigating tests. These prepared specimens were fired at different sintering temperatures. The optimum sintering temperature for each material was selected according to the porosity percentage in the fired specimens, (more or less coincide with In Ceram ± 10%) as well as the maximum temperature; one can get using dental furnaces.
The optimum sintering temperature for all ceramic materials used in this study was found to be 1130°C.
Scanning electron microscopic examination of the sintered structures before glass infiltration, revealed partial sintering of the alumina particles in agglomerates leaving intercalating pores.
A hundred and eighty four total specimens were prepared from the characteristic slip consistency of different materials.
Specially designed molds were constructed in order to prepare the study specimens, which underwent several investigating tests. These prepared specimens were fired at different sintering temperatures. The optimum sintering temperature for each material was selected according to the porosity percentage in the fired specimens, (more or less coincide with In Ceram ± 10%) as well as the maximum temperature; one can get using dental furnaces.
The optimum sintering temperature for all ceramic materials used in this study was found to be 1130°C.
Scanning electron microscopic examination of the sintered structures before glass infiltration, revealed partial sintering of the alumina particles in agglomerates leaving intercalating pores.
Other data
| Title | Toughening of Dental Ceramic Core Materials | Other Titles | زيادة درجة الصلاده لمادة القلب السني السيراميكي | Authors | Atef Shaker Ibrahim | Issue Date | 2001 |
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