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Effect of Nano-Tio2 additions on the densification and properties of magnesite–dolomite ceramic composites

Ghasemi Kahrizsangi, S ; Sharif University of Technology | 2018

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  1. Type of Document: Article
  2. DOI: 10.1007/s40995-016-0143-3
  3. Publisher: Springer International Publishing , 2018
  4. Abstract:
  5. Nano-titania, up to 8 wt%, was added to magnesite–dolomite refractory matrix. The phase and microstructure analyses of samples heated up to 1650 °C for 3 h were studied by XRD and SEM/EDS, respectively. The physical properties are reported in terms of bulk density, apparent porosity, and hydration resistance. In addition, the mechanical behavior was studied by a cold crushing strength (CCS), and flexural strength at 1200 °C test. As a result, it was found that the presence of nano-TiO2 in the magnesite–dolomite matrix induced titanates formation (Mg2TiO4 and CaTiO3), which improved the sintering process. Nano-titania influenced the bonding structure through a direct bonding enhancement. In general, the addition of 6 wt% of nano-TiO2 contributed to reach a maximum increment in physical and mechanical properties. © 2016, Shiraz University
  6. Keywords:
  7. Cold crushing strength ; Hydration resistance ; Magnesite–dolomite ; Nano-titania ; Refractory
  8. Source: Iranian Journal of Science and Technology, Transaction A: Science ; Volume 42, Issue 2 , 2018 , Pages 567-575 ; 10286276 (ISSN)
  9. URL: https://link.springer.com/article/10.1007/s40995-016-0143-3