Publication detail

Corrosion Resistance of Novel Fly Ash–Based Forsterite–Spinel Refractory Ceramics

NGUYEN, M. SOKOLÁŘ, R.

Original Title

Corrosion Resistance of Novel Fly Ash–Based Forsterite–Spinel Refractory Ceramics

Type

journal article in Web of Science

Language

English

Original Abstract

This article aims to investigate the corrosion resistance of novel fly ash–based forsterite–spinel (Mg2SiO4-MgAl2O4) refractory ceramics to various corrosive media in comparison with reactive alumina–based ceramics. Because fly ash is generated worldwide in large quantities as a secondary product from coal-burning power plants, it can be utilized as an inexpensive source of aluminum and silicon oxides. Corrosion resistance to iron, clinker, alumina, and copper was observed by scanning electron microscope with an elemental probe. The influence on the properties after firing was also investigated. Fly ash–based and reactive alumina–based mixtures were designed to contain 10%, 15% and 20% of spinel after firing. Raw material mixtures were sintered at 1550 °C for two hours. Sintered samples were characterized by X-ray diffraction analysis and scanning electron microscopy. The apparent porosity, bulk density, modulus of rupture, refractory and thermo–mechanical properties were also investigated. The experimental results showed that the modulus of rupture, thermal shock resistance and microstructure were improved with increasing amounts of spinel in the fired samples. An analysis of the transition zones between corrosive media and ceramics revealed that all mixtures have good resistance against corrosion to iron, clinker, aluminium and copper.

Keywords

forsterite; spinel; fly ash; corrosion resistance; refractory ceramics

Authors

NGUYEN, M.; SOKOLÁŘ, R.

Released

12. 2. 2022

Publisher

MDPI

Location

Basel, Switzerland

ISBN

1996-1944

Periodical

Materials

Year of study

15

Number

4

State

Swiss Confederation

Pages from

1

Pages to

18

Pages count

18

URL

https://www.mdpi.com/1996-1944/15/4/1363

Full text in the Digital Library

http://hdl.handle.net/11012/203907

BibTex

@article{BUT176496,
  author="Martin {Nguyen} and Radomír {Sokolář}",
  title="Corrosion Resistance of Novel Fly Ash–Based Forsterite–Spinel Refractory Ceramics",
  journal="Materials",
  year="2022",
  volume="15",
  number="4",
  pages="1--18",
  doi="10.3390/ma15041363",
  issn="1996-1944",
  url="https://www.mdpi.com/1996-1944/15/4/1363"
}