Predicting processing-sintering-related properties of mullite-alumina ceramic bodies based on Al-rich anodising sludge by impedance spectroscopy

abstract

Al-rich sludge produced from industrial anodising and surface treatment processes has been tested in the fabrication of mullite/alumma-based refractory/electrical insulating materials, by dry pressing and extrusion. Different compositions were prepared by using sub-products or common natural silica-containing materials, like ball clay, kaolin and/or diatomite. Ultimate properties are dependent on the shaping method and sintering schedule, since both steps strongly affect the microstructural evolution and crystalline phase formation, which in turn determine the performance of the sintered bodies. The response of sintered bodies to impedance spectroscopy was studied and revealed interesting micro structure-electrical relationships, enabling the use of this technique to predict the processing-sintering-related properties. (C) 2004 Elsevier Ltd. All rights reserved.

subject category

Materials Science

authors

Ribeiro, MJ; Abrantes, JCC; Ferreira, JM; Labrincha, JA

our authors

Share this project:

Related Publications

We use cookies for marketing activities and to offer you a better experience. By clicking “Accept Cookies” you agree with our cookie policy. Read about how we use cookies by clicking "Privacy and Cookie Policy".