Thermal Shock Resistance for Binary Al18B4O33 - Al2O3 Ceramic System via Solar and Electrical Energies

Document Type : Original Article

Authors

1 Imam Mohamed Ibn Saud Islamic University (IMSIU), Collage of Science, Chemistry Dept. Riyadh 11623, Saudi Arabia.

2 El Buhouth St., Dokki 12622

3 Glass 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.

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Egyptian Journal of Chemistry
Volume 65, Issue 131 - Serial Number 13
Special Issue: Chemistry and Global Challenges (Part A)
December 2022
Pages 613-619

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History

  • Receive Date: 26 May 2022
  • Revise Date: 07 July 2022
  • Accept Date: 18 July 2022

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