The Fabrication and Characterization Behavior of Cordierite Ceramic Materials with different Molar Fraction

Abstract

The investigation was concentrated on preparation of bioactive pure cordierite ceramic and evaluate the phase transformation which excepted to form during sintering process. Cordierite prepare by chemical co precipitation, integrated Cordierite gel with water-based sol–gel which begin essentially from Alumina Al2O3, magnesium oxide MgO and silicon oxide SiO2. Different specimens were fabricated with various weight percentage of Al2O3, Mgo and SiO2 powders. All specimens were prepared in cylindrical shape by using hydraulic press at pressure of 4 bar with holding time at this pressure for 30 minutes. Firing presses achieve at 10000C and 12500C with 2 hour holding time. The characterization of microstructure has been done by using Field Emission Scanning Electron Microscope (FESEM), which revealed homogenous distribution of the compounds with few porosities. The x-ray diffraction for phase transformation which occur during sintering process. The structure analysis of specimens shows at 1250°C cordierite phase form, also the results are shown formation of cristobalite, spinel, protoestatite and corundum with cordierite phase.

Electrical, Microstructural and Physical Characteristics of Talc-based Cordierite Ceramics

“…Cristobalite could result from the decomposition of the silicate minerals in the batches at all sintering temperatures (1000-1350ºC) (Table 3) in addition to its possible crystallization from the developed silicate melts [55,57]. Cristobalite appears with variable concentrations (0.10-43.30wt.%, Table 3) with no general trends in most samples.…”

“…Cordierite begins to exist with low concentrations at 1200ºC, however, it is recognized as the main phase in all BT samples at 1300, 1350 and 1375ºC (6.20-47.00), (56.60-87.40), (47.90-86.50), and (84.10-92.50wt.%), respectively (Table 3). Cordierite is crystallized beginning from 1200ºC at the expense of enstatite, mullite, cristobalite and diopside (Table 3) [21,22,24,55,57]. This is aided by the high contents of TIOs of the batches (2.03-11.44wt.%, Table 2) which accelerates the solid-state formation of orthorhombic cordierite by lowering its crystallization temperature [20,24,27,[58][59][60].…”

Electrical, Microstructural and Physical characteristics of talc-based cordierite ceramics

“…Cordierite begins to exist with low concentrations at 1200ºC, however, it is recognized as the main phase in all BT samples at 1300, 1350 and 1375ºC (6.20-47.00), (56.60-87.40), (47.90-86.50), and (84.10-92.50wt.%), respectively (Table 3). Cordierite is crystallized beginning from 1200ºC at the expense of enstatite, mullite, cristobalite and diopside (Table 3) [21,22,24,55,57]. This is aided by the high contents of TIOs of the batches (2.03-11.44wt.%, Table 2) which accelerates the solid-state formation of orthorhombic cordierite by lowering its crystallization temperature [20,24,27,[58][59][60].…”

The Biomedical Investigation of Bioceramic Cordierite as Orthopedic Material

“…The cordierite/wollastonite bio-ceramics demonstrated that the surface of these specimens had been fully coated by hydroxyapatite formation. Basheet et al [9,10] prepare cordierite system by coprecipitation method with sintering temperature 1250 o C and investigate the biotribiology behavior of cordierite by using SBF and AMTI Orth-POD wear tester.…”