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Bulletin of Materials Science

, Volume 3, Issue 4, pp 435–442 | Cite as

On the sintering kinetics of titania doped ceramic lanthanum chromite

  • K P Bansal
  • S Kumari
  • B K Das
  • G C Jain
Article

Abstract

The sintering behaviour of lanthanum chromite with the addition of 1 to 3 wt% TiO2 was studied. Densification was examined as a function of sintering temperature and TiO2 concentration. The results showed that pure LaCrO3 could not be densified to >75% of the theoretical density, while the densities exceeding 90% of the theoretical were achieved with 3 wt% titania addition at 1600° C.

Metallographic study reveals a normal grain growth following the rate equationD 2D 0 2 =kt. Activation energies both for densification and grain growth have been estimated to be ≈ (80±5) k cal/mole in case of 3 wt% TiO2 addition.

Keywords

Activation energy densification grain growth lanthanum chromite sintering kinetics 

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References

  1. ASTM Designation 1971, C20-70 Parts13 6.Google Scholar
  2. Anderson H Uet al 1977, 13th Rare Earth Conf. Olgebay Park W. Vir, Oct. 16Google Scholar
  3. Anderson H U 1978 Processing of crystalline ceramics (New York: Plenum) 467–77Google Scholar
  4. Anderson H U 1974J. Am. Ceram. Soc. 57 34CrossRefGoogle Scholar
  5. Bansal K P, Kumari S, Das B K and Jain G C 1980 Communicated toTran. J. Brit. Ceram. Soc. Google Scholar
  6. Callister W Det al 1979J. Am. Ceram. Soc. 62 208CrossRefGoogle Scholar
  7. George A M and Karkhanawala M D 1979 Symp. Sintering & Sintered Products BARC, Oct. 29–31Google Scholar
  8. Halloran J W and Anderson H U 1974J. Am. Ceram. Soc. 57 150CrossRefGoogle Scholar
  9. Khattak C P and Cox D E 1977Mat. Res. Bull. 12 463CrossRefGoogle Scholar
  10. Leslie Group and Anderson H U 1976J. Am. Ceram. Soc. 59 449CrossRefGoogle Scholar
  11. Meadowcroft D B 1969Br. J. Appl. Phys. Ser. 2 1225Google Scholar
  12. Meadowcroft D B 1972 Energy Conversion8 185CrossRefGoogle Scholar
  13. Meadowcroft D B 1972 Energy Conversion12 145CrossRefGoogle Scholar
  14. Meadowcroft D B 1973 Conf. on Strontium Containing Compounds, Halifex, CanadaGoogle Scholar
  15. St. Jacques R G, Moise A and Yerouchalmi D 1974J. Canad. Ceram. Soc. 43 23Google Scholar
  16. Stuijts A L 1968 Ceramic Microstructures Chap. 19 (New York: John Wiley)Google Scholar
  17. Yan M F and Johnson Jr D W 1978J. Am. Ceram. Soc. 61 342CrossRefGoogle Scholar

Copyright information

© Indian Academy of Sciences 1981

Authors and Affiliations

  • K P Bansal
    • 1
  • S Kumari
    • 1
  • B K Das
    • 1
  • G C Jain
    • 1
  1. 1.Division of MaterialsNational Physical LaboratoryNew DelhiIndia

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