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Bulletin of Materials Science

, Volume 21, Issue 1, pp 81–86 | Cite as

Preparation of tetragonal zirconia powders by a solid state reaction: Kinetics, phases and morphology

  • V V Mishra
  • A K Garg
  • D C Agrawal
Research Articles

Abstract

Powders of tetragonal (t)ZrO2 have been prepared by a solid state reaction between sodium metazirconate and sodium metaphosphate. The reaction temperatures and times have been varied between 450 and 550°C and 5 and 75 h, respectively. Zirconia powder, mostly in thet andt′ phases, is obtained. The yield of ZrO2 powder increases monotonically with time at all reaction temperatures according to a phase boundary controlled kinetics. The fraction oft phase also increases with time at 450°C and 500°C but goes through a maximum at 550°C, the highest temperature employed. A maximum of 55% of the precursor monoclinic zirconia (used to prepare sodium meta zirconate) is converted tot phase at 500°C/75 h. The ZrO2 powder consists of crystallites of size 9–25 nm agglomerated into particles having average size between 2 and 4µm. The agglomerates have a breaking strength of 100 MPa. A hydrothermal treatment is found to break the agglomerates into smaller sizes. Grinding the powder in a mortar and pestle converts only 12% of thet phase into monoclinic, indicating that substantial fraction of the tetragonal phase is the non transformable varietyt′. Heating experiments also confirm this.

Keywords

Tetragonal zirconia powder preparation solid state reaction 

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References

  1. Benedetti A, Fagherazzi G and Pinna F 1989J. Am. Ceram. Soc. 72 467CrossRefGoogle Scholar
  2. Brook R J 1980 inAdvances in ceramics (eds) A H Heuer and L W Hobbs (Columbus, Ohio: The American Ceramic Society) Vol. 3, p. 272Google Scholar
  3. Graff M A C G Van de, Keizer K and Burggraaf A J 1980 inScience of ceramics (ed.) H Hausner (Berlin: Deutche Keramiche Gesellschabt) Vol. 10, p. 983Google Scholar
  4. Graff M A C G Van de and Burggraaf A J 1983 inAdvances in ceramics (eds) N Claussen, M Ruhle and A H Heuer (Columbus, Ohio: The American Ceramic Society) Vol. 12, p. 744Google Scholar
  5. Haberko K, Ciesla A and Pron A 1975Ceram. Int. 1 111CrossRefGoogle Scholar
  6. Haberko K and Pyda W 1983 inAdvances in ceramics (eds) N Claussen, M Ruhle and A H Heuer (Columbus, Ohio: The American Ceramic Society) Vol. 12, p. 774Google Scholar
  7. Hancock J D and Sharp J H 1972J. Am. Ceram. Soc. 55 74CrossRefGoogle Scholar
  8. Harrison A, Stevens R and Miline S J 1987J. Mater. Sci. Lett. 6 673CrossRefGoogle Scholar
  9. Heistand II R H, Ogure Y, Okamura H, Moffalt W C, Novich R, Barringer E A and Bowen H K 1985 inScience of ceramic processing (eds) C L Hench and R Ulrich Donald (New York: John Wiley and Sons) pp. 482–497Google Scholar
  10. Jean V S 1991Br. Ceram. Proc. 47 45Google Scholar
  11. Kagawa M, Honda F, Onodera H and Nagawe 1983Mater. Res. Bull. 18 1081CrossRefGoogle Scholar
  12. Maher G H, Hutchins C E and Ross S D 1993Am. Ceram. Soc. Bull. 72 72Google Scholar
  13. Mazdiyasni K S, Lynch C T and Smith J S III 1967J. Am. Ceram. Soc. 50 532CrossRefGoogle Scholar
  14. Mottet B, Pichvant M, Beny J M and Alary J A 1992J. Am. Ceram. Soc. 75 2515CrossRefGoogle Scholar
  15. Nishizawa H, Yamasaki N, Matsuoka K and Mitsushio H 1982J. Am. Ceram. Soc. 65 343CrossRefGoogle Scholar
  16. Nishizawa H, Tani T and Matsuoka K 1984J. Mater. Sci. 19 2921CrossRefGoogle Scholar
  17. Rhodes W H 1981J. Am. Ceram. Soc. 64 19CrossRefGoogle Scholar
  18. Roosen A and Hauser H 1983 inAdvances in ceramics (eds) N Claussen, M Ruhle and A H Heuer (Columbus, Ohio: The American Ceramic Society) Vol. 12, p. 714Google Scholar
  19. Sirkar A and Brett N H 1970Trans. Br. Ceram. Soc. 69 131Google Scholar
  20. Suzuki M, Kagawa M, Syono Y and Hirai T 1992J. Mater. Sci. 27 679CrossRefGoogle Scholar
  21. Toraya H, Yoshimara M and Somiya S 1984J. Am. Ceram. Soc. 67 C-119Google Scholar

Copyright information

© the Indian Academy of Sciences 1998

Authors and Affiliations

  • V V Mishra
    • 1
  • A K Garg
    • 1
  • D C Agrawal
    • 1
  1. 1.Materials Science ProgrammeIndian Institute of TechnologyKanpurIndia

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