Preparation and characterisation of self-flowing refractory material containing 971U type microsilica

Gogtas C. , UNLU N., ODABASI A., SEZER L., CINAR F., GUNER S., ...More

ADVANCES IN APPLIED CERAMICS, vol.109, no.1, pp.6-11, 2010 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 109 Issue: 1
  • Publication Date: 2010
  • Doi Number: 10.1179/174367609x422199
  • Page Numbers: pp.6-11
  • Keywords: Refractory material, Alumina castable, Firing temperature, Microsilica, Characterisation, Self-flowing, HIGH-ALUMINA CASTABLES, ZERO-CEMENT, EVOLUTION, RHEOLOGY


A newer composition of self-flowing low cement brown fused alumina castable containing 971U type microsilica was developed. Optimum flow characteristics were achieved using water addition of 4.6 wt-%. This batch was sintered at different firing temperatures up to 1500 degrees C. To understand the effect of both firing temperatures and corresponding phases, the present castable was characterised in terms of X-ray diffraction, scanning electron microscopy, bulk density (BD), apparent porosity (AP), water absorption (WA), cold crushing strength (CCS) and self-leveling flowability. The results revealed that gradual increase in firing temperature from 1100 through 1500 degrees C caused low AP and WA, and high CCS properties due to the densification of the castable.