Thermal Shock Resistance for Binary Al18B4O33 - Al2O3 Ceramic System via Solar and Electrical Energies | ||||
| Egyptian Journal of Chemistry | ||||
| Volume 65, Issue 131, December 2022, Page 613-619 PDF (487.29 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejchem.2022.140692.6156 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
sayed kenawy hamed ibrahim   1; Ahmed M. Khalil 2; Esmat M A Hamzawy 3
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| 1Imam Mohamed Ibn Saud Islamic University (IMSIU), Collage of Science, Chemistry Dept. Riyadh 11623, Saudi Arabia. | ||||
| 2El Buhouth St., Dokki 12622 | ||||
| 3Glass Research Dep | ||||
| Abstract | ||||
| In the present work; the impact of the solar and electrical energy on microstructures, crystalline phases and mechanical properties in the binary aluminum borate/alumina ceramic composite, prepared by wet method were studied. Solar and electrical energy were employed by sintering the prepared samples at 1400 °C then thermally shocked at 1200 °C and 1000 °C in the 100 and 20 cycles respectively. Corundum (Al2O3) with a low content of aluminum borate (Al18B4O33) was developed after sintering process and thermal shock. The scanning electron microscopy indicated a partial melting since the nano-scale rod crystals edges changed into curved one. Mechanical properties comprising (Young´s (E) and Coulomb´s (G) elastic moduli of elasticity) and density were investigated. The mechanical properties of these materials were deteriorated when compared with pure alumina ceramics. The flexural strength values of alumina ceramic showed the highest value of 244 MPa compared to 67 MPa for alumina/aluminum borate composite, after 100 cycles of thermal shock. | ||||
| Keywords | ||||
| Corundum; Aluminum borate (Al18B4O33); Thermal shock; Nano-scale crystals | ||||
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