The Korean Journal of Ceramics

The Korean Ceramic Society (한국세라믹학회)
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Characterization of Chemically Stabilized $\beta$-cristobalite Synthesized by Solution-Polymerization Route

  • Published : 1997.06.01
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Abstract

A chemically stabilized $\beta$-cristobalite, which is stabilized by stuffing cations of $Ca^{2+}$ and $Al^{3+}$, was prepared by a solution-polymerization route employing Pechini resin or PVA solution as a polymeric carrier. The polymeric carrier affected the crystallization temperature, morphology of calicined powder, and particle size distribution. In case of the polyvinyl alcohol (PVA) solution process, a fine $\beta$-cristobalite powder with a narrow particle size distribution (average particle size : 0.3$\mu\textrm{m}$) and a BET specific surface area of 72 $\m^2$/g was prepared by an attrition-milling for 1 h after calcination at 110$0^{\circ}C$ for 1h. Wider particle size distribution and higher specific surface area were observed for the $\beta$-cristobalite powder derived from Pechini resin. The cubie(P1-to-tetraganalb) phase transformation in polynystalline $\beta$-cristobalite was induced at approximately 18$0^{\circ}C$. Like other materials showing transformation toughening, a critical size effect controlled the $\beta$-to-$\alpha$ transformation. Densifed cristobalite sample had some cracks in its internal texture after annealing. The cracks, occurred spontaneoulsy on cooling, were observed in the sample with an average grain sizes of 4.0 $\mu\textrm{m}$ or above. In case of the sintered cristobalite having a composition of CaO.$2Al_2O_3$.40SiO$_2$, small amount of amorphous phase and slow grain growth during annealing were observed. Shear stress-induced transformation was also observed in ground specimen. Cristobalite having a composition of CaO.2Al2O3.80SiO2 showed a more sensitive response to shear stress than the CaO.$2Al_2O_3$.40SiO$_2$ type cristobalite. Shear-induced transformation resulted in an increase of volume about 13% in $\alpha$-cristobalite phase on annealing for above 10 h in the case of the former composition.

Keywords

References

  1. Philos. mag. v.31 The Structures of the β-cristobalite Phase of SiO₂and AlPO₄ A. F. Wright;a. J. Leadbetter
  2. Z. Kristallogr v.138 High-Temperature Single-Crystal Study of the Cristobalite Inversion D. A. Peacor
  3. J. Am. Ceram. Soc. v.41 no.12 Silica Structure Studies: V, The Variable Inversion in Cristobalite V. G. Hill;R. Roy
  4. J. Am. Ceram. Soc. v.71 no.12 Possible Alternative Transformation Tougheners to Zirconia: Crystallographic Aspects W. M. Kriven
  5. J. de Physique IV, Colloque v.C8 Displacive Phase Transformation and Their Applications in Structural Ceramics W. M. Kriven
  6. J. Am. Ceram. Soc. Phase Transformation Weaking Behavior of Chemically Stabilized β-cristobalite, Part II. Mullite/Cordierite Laminates with a β-cristobalite Interphase W. M. Kriven;S. J. Lee
  7. M. S. Thesis, Univ. Illinois at Urbana-Champaign Phase Transformation Weakening in Fibrous Ceramic Composites; An Investigation of the Enstatite (MgSiO₃)/Titania (TiO₂) System S. C. mirek
  8. Acta Metall. v.40 no.11 The Fabrication and Failure of Laminar Ceramic Composites W. J. Clegg
  9. Am. J. Sci.(4th Series) v.36 no.214 Stability Relations of the Silica Minerals C. N. Fenner
  10. Am. Ceram. Soc. Bull. v.36 no.4 Structural Anomalies in Tridymite and Cristobalite W. Eitel
  11. Am. Mineral. v.39 no.7-8 Stuffed Derivatives of the Silica Structures M. J. Buerger
  12. J. Am. Ceram. Soc. v.72 no.3 Chemical Stabilization of β-cristobalite A. J. Perrotta;D. K. Grubbs;E. S. Martin;N. R. Dando
  13. J. Am. Ceram. Soc. v.77 no.1 Further Investigation of the Stabilization of β-cristobalite E. S. Thomas;J. G. Thompson;R. L. Withers
  14. J. Appl. Phys. v.75 no.3 Pressure-Induced Phase Transition and Presure Dependence of Crystal Structure in Low (α) and Ca/Al-Doped Cristobalite J. B. Parise;D. J. Weidner;J. D. Jorgensen;M. A. Saltzberg
  15. Ceramic Transactions v.62 A Simple Solution Polymerization Route for Oxide Powder Synthesis M. A. Gulgun;W. M. Kriven
  16. Science, Technology, and Commercialization of Powder Synthesis and Shape forming Processes J. J. Kingsley;C. H. Schilling;J. H. Adair(eds)
  17. J. Am. Ceram. Soc. Nano-size Amorphous Cordierite Powder Prepared by a Solution-Polymerization Route S. J. Lee;W. M. Kriven
  18. J. Am. Ceram. Soc. Chemical Synthesis of Dysprosium Titanate via Stearic Entrapment M. H. Nguyen;W. M. Kriven
  19. U. S. pat. No.3,330,697 Method of Preparing Lead and Alkaline Earth Titanates and Niobates and Coating Methods Using the Same to Form a Capacitor M. Pechini
  20. Mater. Res. Soc. Symp. Proc. v.32 Preparation of Strontium Titanate Ceramics and Internal Boundary Layer Capacitors by the Pechini Method D. Budd;D. A. Payne
  21. J. Mater. Res. v.7 no.2 Modified Resin-Intermediate Processing of Perovskite Power: Part I. Optimization of Polymeric Precursors L. W. Tai;P. A. Lessing
  22. J. Mater. Res. v.7 no.2 Modified Resin-Intermediate Processing of Perovskite Powder: Part II. Processing for Fine, Nonagglomerated Sr-Doped Lanthanum Chromite Powders L. W. Tai;P. A. Lessing
  23. Am. Ceram. Soc. Bull. v.68 no.5 Mixed-Cation Oxide Powder via Polymeric Precursors P. A. Lessing
  24. Polyvinyl Alcohol Properties and Applications General Properties of Polyvinyl Alcohol in Relation to its Applications K. Toyoshima;C. A. Finch(ed.)
  25. Quantitative Microscopy R. T. DeHoff;F. N. rhines
  26. Advances in Ceramics v.24 The Particle-Size Effect of Dicalcium Silicate in a Calcium Zirconate matrix W. M. Kriven;C. J. Chan;E. V. Barinek
  27. Science and Technology of Zirconia III S. Somiya;N. Yamamoto;H. Hanagida(eds)
  28. J. Am. Ceram. Soc. v.77 no.10 Phase Stability of Chemically Derived Enstatite (MgSiO₃) Powders C. M. Huang;D. H. Kuo;Y. J. Kim;W. M. Kriven
  29. Phys. Chem. Minerals v.16 The Structure and Microstructure of α-cristobalite and Its Relationship to β-cristobalite R. L. Withers;J. G. Thompson;T. R. Welberry
  30. Non-oxide Technical and Engineering Ceramics, Elsevior, Applied, Sci. Oxidation Removal of Organic Binders from Injection-molded Ceramics B. C. Mutsuddy