Improvement of sintering and microstructural homogeneity of a diphasic mullite

Kara F., Sener O.

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, vol.21, no.7, pp.901-905, 2001 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 21 Issue: 7
  • Publication Date: 2001
  • Doi Number: 10.1016/s0955-2219(00)00280-6
  • Journal Name: JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.901-905
  • Keywords: grain size, mullite, seeding, sintering, sol-gel processes, ALUMINOSILICATE GELS, CRYSTALLIZATION, TRANSFORMATION, DENSIFICATION, MULLITIZATION, BEHAVIOR, POWDERS
  • Anadolu University Affiliated: No

Abstract

Effect of seeding of boehmite-colloidal silica mixture with aluminium sulphate-colloidal silica mixture on its mullite formation and sintering behaviours and microstructural development was studied. It was observed that early forming mullite crystallites from aluminium sulphate-colloidal silica mixture acted as nuclei for boehmite-silica mixture and improved mullite formation behaviour. Although seeding reduced viscous flow sintering behaviour of boehmite-colloidal silica mixtures its solid state sintering behaviour was improved as seeding reduced mullite grain size and prevented the occurrence of fine intragranular pores within mullite grains. (C) 2001 Elsevier Science Ltd. All rights reserved.