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Optimized microstructure with alumina micropowder and its effects on properties of phosphate-bonded castables

  • Bingbing Zhang , Wei Gong , Xiangcheng Li , Pingan Chen and Boquan Zhu
Published/Copyright: August 7, 2019
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 110 Issue 8

Abstract

Several phosphate-bonded castables were prepared using corundum as a raw material and 48 wt.% phosphoric acid as a binder. The phase composition, microstructural evolution, and properties of the castables samples were analyzed, and a relationship between the microstructures and properties of the castables was established. The results revealed that the cold modulus of rupture of the specimens increased by 19 % to 33.02 MPa after firing at 1 100 °C when the alumina micropowder content increased from 10 % to 15 %. X-ray diffraction analysis revealed that corundum and AlPO4 were present in the castables fired at both 1 100 °C and 1 500 °C. The intensities of the AlPO4 diffraction peaks increased as the alumina micropowder content and sintering temperature increased. Scanning electron microscopy revealed that AlPO4 was tightly arranged and packed with particles.

Keywords: Castables; Phosphate; AlPO4; Alumina micropowder
∗Correspondence address, Xiangcheng Li, Pingan Chen, Boquan Zhu, The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, NO. 947, Heping Road, Wuhan 430081, PR China, Tel: +86-27-68862616, Fax: +86-27-68862616, Email: and and

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Received: 2018-11-02
Accepted: 2019-03-06
Published Online: 2019-08-07
Published in Print: 2019-08-12

© 2019, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111796
Keywords for this article
Castables; Phosphate; AlPO4; Alumina micropowder

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Dendritic solidification of highly undercooled dilute alloys
  5. Dendritic structure formation of magnesium alloys for the manipulation of corrosion properties: Part 2 – corrosion
  6. Thermodynamic properties of cerium molybdate
  7. A new approach to reduce springback in sheet metal bending using digital image correlation
  8. Effects of minor La and Ce additions on microstructure and mechanical properties of A201 alloy
  9. Strengthening and toughening of laminated TiAl composite sheets by titanium alloy layers and carbide particles
  10. A fractal analysis for the microstructures of β-SiC films
  11. Synthesis of La2(Zr0.7Ce0.3)2O7 nanopowder using a simple chemical precipitation method and heat treatment at high temperature
  12. Optimized microstructure with alumina micropowder and its effects on properties of phosphate-bonded castables
  13. Co-deposition and electrokinetic behavior of TiO2–WO3 nanoparticles under non-uniform AC field
  14. 3D nanoflower-structured TiO2 photoanode for efficient photoelectrochemical water splitting
  15. Short Communications
  16. Investigation of Al2O3/TiB2 ceramic cutting tool materials with the addition of core–shell structured Ni–B coated CaF2
  17. DGM News
  18. DGM News
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