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Hollandite ceramics: Effect of composition on melting temperature

Conference Paper


Abstract


  • Hollandite-bearing (30-60 wt%) ceramic melts incorporating varying amounts of Cs2O (1.96-7.5 wt%) have been prepared in air by melting. Minor phases included zirconolite, perovskite and rutile. Detailed analysis of the phase assemblage of the samples by electron microscopy is presented on materials in which Fe, Co, Cr, Ni or Mn is targeted towards the B-site of the titanate hollandites, and the Cs in the hollandite A-site. Mn, Ni and Co entered the hollandite as divalent species while Fe and Cr in the hollandite were trivalent. DTA measurements showed that the melting temperatures of the differently substituted hollandite-rich ceramic melts varied between 1315 and 1450��C. The effect on melt temperature and phase assemblage of substituting K for Ba in the hollandite structure of the melts was also examined.

Publication Date


  • 2005

Citation


  • Carter, M. L., Vance, E. R., Cassidy, D. J., Li, H., & Mitchell, D. R. G. (2005). Hollandite ceramics: Effect of composition on melting temperature. In Ceramic Transactions Vol. 168 (pp. 207-216).

Scopus Eid


  • 2-s2.0-23744470153

Start Page


  • 207

End Page


  • 216

Volume


  • 168

Issue


Place Of Publication


Abstract


  • Hollandite-bearing (30-60 wt%) ceramic melts incorporating varying amounts of Cs2O (1.96-7.5 wt%) have been prepared in air by melting. Minor phases included zirconolite, perovskite and rutile. Detailed analysis of the phase assemblage of the samples by electron microscopy is presented on materials in which Fe, Co, Cr, Ni or Mn is targeted towards the B-site of the titanate hollandites, and the Cs in the hollandite A-site. Mn, Ni and Co entered the hollandite as divalent species while Fe and Cr in the hollandite were trivalent. DTA measurements showed that the melting temperatures of the differently substituted hollandite-rich ceramic melts varied between 1315 and 1450��C. The effect on melt temperature and phase assemblage of substituting K for Ba in the hollandite structure of the melts was also examined.

Publication Date


  • 2005

Citation


  • Carter, M. L., Vance, E. R., Cassidy, D. J., Li, H., & Mitchell, D. R. G. (2005). Hollandite ceramics: Effect of composition on melting temperature. In Ceramic Transactions Vol. 168 (pp. 207-216).

Scopus Eid


  • 2-s2.0-23744470153

Start Page


  • 207

End Page


  • 216

Volume


  • 168

Issue


Place Of Publication