Abstract
Porous spinel-forsterite composite ceramics were fabricated via an in situ reaction sintering method using fused magnesia, alumina and quartz powders as starting raw materials. The phase compositions and pore characteristics were characterized by means of x-ray diffraction (XRD) and scanning electronic microscopy (SEM). Apparent porosity, bulk density, linear change, flexural strengths and compressive strengths of the porous composite ceramic samples were also tested. The results show that the content of Al2O3 and sintering temperature obviously affect the apparent porosity of the porous spinel-forsterite composite ceramics. The fabricated sample with 30 wt% Al2O3 sintered at 1450 °C possessed the combination of apparent porosity of 40.73%, flexural strength of 22.95 MPa and compressive strength of 68.17 MPa. The lower porosity, relatively denser microstructures, more uniform distribution and strengthen neck-connect between the grains all result in the increase of the mechanical strength of the porous spinel-forsterite composite ceramic that is a potential thermal insulating material with high mechanical strength.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
