Paper Titles
Performance and Friction Properties of Injection Hybrid Moulds with Stereolithography Moulding Zones
p.1673
Hardware and Software Improvements in the Hotbird
p.1678
Experimental Phase Diagram of the Ternary Bi-Sn-Zn
p.1682
Decay and Conservation of Building Stones on Cultural Heritage Monuments
p.1689
New Ceramic Products from Slate and Aluminium Sludge Wastes
p.1695
Reusing Porcelain Tile Polishing Wastes in the Manufacturing of Aluminosilicate Fireplace Bricks
p.1700
Use of Sewage Sludge in the Production of Light-Weight Ceramic Bricks
p.1706
Effect of Dolomite Addition on the Densification of Fly Ash Based Ceramics
p.1711
Highly Reactive Alumina Production from Spent Baths
p.1716

New Ceramic Products from Slate and Aluminium Sludge Wastes

Article Preview

Abstract:

Previous studies had shown that a promising material could be obtained by mixing aluminium-rich sludge with slate powder (with Al2O3:SiO2 molar proportion of 2:1), shaping by uniaxial pressing and sintering at 1300oC, in order both to detoxify the sludge by fixing the metals in a leach-resistant ceramic matrix and to yield a new material from the reactions of the above compounds at high temperature. In view of potential applications, since this material was also found to be inert after leaching tests, a further systematic study, reported in the present paper, was carried out, in order to determine its mechanical properties and discuss them in function of the microstructure. The average values of Vickers hardness HV3 (683), bend strength (126 MPa), Young's modulus (161GPa) and fracture toughness (3.35 MPa.m1/2) are significantly higher than those found for the as sintered slate powders, which is attributed to the increased fraction of α- alumina and reduced content of glassy phase in the microstructure of the material with sludge addition.

You might also be interested in these eBooks
Advanced Materials Forum III View Preview

Info:

Periodical:

Materials Science Forum (Volumes 514-516)

Pages:

1695-1699

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.514-516.1695

Citation:

Cite this paper

Online since:

May 2006

Authors:

Isabel M. Martins, Claudino Xavier, Maria Helena Mendonça, Manuela Oliveira

Keywords:

Aluminium Sludges, Mechanical, Powder Technology, Recycling, Slates

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2006 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] I. M. Martins, S. Vieira, V. Livramento, J. Sousa, F. Delmas, M. M. Oliveira and M. T. Vieira: Materials Science Forum, Vol. 455-456 (2004), p.822.

DOI: 10.4028/www.scientific.net/msf.455-456.822

Google Scholar

[2] I. M. Martins, J. Sousa, L. Catarino, M. T. Vieira and M. M. Oliveira: Key Engineering Materials, Vol. 230-232(2002), p.380.

Google Scholar

[3] Y-F Chen, M-C Wang, M-H Hon: J. Mater. Res., Vol. 18 (2003), p.1355.

Google Scholar

[4] R. Morrell: Handbook of Properties of Technical & Engineering Ceramics (NPL, UK, 1989).

Google Scholar

[5] M. Dondi, G. Ercolani, C. Melandri, C. Mingazzini and M. Marsigli: Interceram, Vol. 48 (1999), p.75.

Google Scholar

[6] M. Campos, F. Velasco, M.A. Martinez and J.M. Torralba: Journal of the European Ceramic Society Vol. 24 (2004), p.811.

Google Scholar

[7] S. Kumar, K. K. Singh and P. Ramachandrarao: J. Materials Science, vol. 36 (2001), p.5917.

Google Scholar

[8] L. Barbieri, L. Bonfatti, C. Leonelli, T. Manfredini, D. Settembre Blundo: Industrial Ceramics, Vol. 17 (1997), p.133.

Google Scholar