Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Investigation of High Temperature Electrical Conductivity of CaO-partially Stabilized $ZrO_2$

CaO에 의하여 부분 안정화된 $ZrO_2$의 고온 전기 전도도에 대한 연구

  • 변수일 (한국과학원 재료공학과)
  • Published : 1979.04.01
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Abstract

The present work was undertaken: (1) to determine if CaO-partially stabilized $ZrO_2$ prepared by Hot Petroleum Drying Method would show better ionic conductor as an oxygen sensor in molten metals than that prepared by Oxide Wet Mixing Method and than CaO-fully stabilized $ZrO_2$, and (2) to understand the nature of conduction mechanism of CaO-partially stabilized $ZrO_2$ by a comparison of measured electrical conductivity data with theory on defect structure of pure monoclinic $ZrO_2$ and fully stabilized cubic $ZrO_2$. The DC electrical conductivity was measured by 3-probe technique and the AC electrical conductivity by 2-probe technique as a function of temperature in the range 973-1373 K and oxygen partial pressure in the range 10-1-10-25Mpa. The results of the experiments were as follows: 1. CaO-partially stabilized $ZrO_2$ prepared by Hot petroleum Drying Method showed at T=1094-1285 K and $Po_2$=10-7-10-25 MPa a nearly ionic conduction with 4 times higher conductivity than that prepared by Oxide Wet Mixing Method. 2. High-oxygen pressure conductivity tends toward a Po_2^{+1/5}-Po_2^{+1/6}$dependence. An analysis of possible defect structures suggests that CaO-partially stabilized $ZrO_2$ has an anti-Frenkel defect in which singly or doubly ionized oxygen interstitials and defect electrons predominate at T=1094-1285 K and $Po_2$=10-1-10-7MPa. 3. The activation energy for pure electron hole-conduction and ionic conduction of CaO-partially stabilized $ZrO_2$ was found to be 130 KJ/mol at T=973-1373 K, $Po_2$=2, 127 10-2 MPa(air) and 153KJ/mol at T=1094-1285 K respectively.

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References

  1. J. Electrochem. Soc. v.104 no.6 Measurements on Galvanic Cells Involving Solid Electrolytes K. Kiukkola;C. Wagner
  2. J. Amer. Ceram. Soc v.47 no.12 Electrical Properties and Defect Structure of Zirconia: 1, Monoclinic phase R. W. Vest;N. M. Tallan;W. C. Tripp
  3. J. Ceram. Soc v.55 no.9 Effect of Oxide Defect Structure on the Electrical Properties of ZrO₂ A. Kumar;D. Rajdev;D. L. Douglass
  4. Z. Phys. Chem. v.199 no.1-3 Die Fluoritephase im System$ZrO_2-CaO$. Ihre Fehlordnung UND das Auftreten elektrischer Leitfahigkeit F. Hund
  5. Compt. Rend v.236 no.18 Etude de la conductibilite electrique du systeme Zircone-Chaux a haute temperature F. Trombe;M. Foex
  6. J. Amer. Ceram. Soc v.42 no.8 Oxygen Jon Mobility in Cubic$Zr_0.85Ca_0.15O_1.85$ W.D. Kingery;J. Pappis;M.E. Doty;D.C. Hill
  7. Trans. Inst. Electrochem v.1 no.97 Electrical Conductivity of Solid Oxides: II, The$ZrO_2$-CaO System, Electrical Conductuivity, and Transport Numbers Z.S. Volchenkova;S.F. Paguev
  8. Amer. Ceram. Soc. Bull. v.41 no.4 Ionic Self Diffusion in Calcia-Stabilized Zirconia W.H. Rhodes;R.E. Carter
  9. J. Chem. Phys. v.39 no.4 X-Ray and Electrical Conductivity Study of the Fluorite Phase in the System$ZrO_2$-CaO T.Y. Tien;E.C. Subbarao
  10. J. Electrochem. Soc. v.110 no.4 Electrical Resistivity of Stabilized Zirconia at Elevated Temperatures J.M. Dizon;L.D. LaGrange;U. Merten;C.F.Miller;J.T. Porter, II
  11. J. Electrochem. Soc. v.111 no.1 High Temperature Electrical Conductivity in the System CaO-ZrO₂ H.A. Johansen;J.G. Cleary
  12. J. Electrochem. Soc. v.109 no.8 A Solid Electrolyte Fuel Cell J. Weissbart;R. Ruka
  13. Z. Elektrochem. Ber. Bunsenges. Phys. Chem v.66 no.7 Uber Zirkondioxud als Elektrolyt fur Elektorchemische Untersuchungen bei Hoheren Temperaturen H. Schmalzried
  14. Trans. Met. Soc. AIME v.223 Factors Influencing the Performance of Solid Oxide Electrolytes in High-Temperature Thermodynamic Measurements B.C.H. Steele;C.B. Alcock
  15. Science of Ceramics v.4 Stabilized Zirconia Particles by Sol-Gel Process T.A. Woodhead;G.H. Stewatr(ed.)
  16. J. Canad. Ceram. Soc. v.42 Preparation and Characterization of Lime-Stabilized Zirconia T.A. Wheat
  17. Ceramurg. Intern. v.1 no.3 Production of Stabilized Zirconia for Use as a Solid-State Electrolyte M.T. Bannister;W.G. Garrett
  18. Ceramurg. Intern. v.1 no.3 Sintering Behaviour of Yttria-Stabilized Zirconia Powders Prepared by Gels K. Haberko;A. Ciesla;A. Pron
  19. Brit. J. Appl. Phys. v.14 The High Temperature Electrocal Conductivity of Single Crystal Alunmina P.J. Harrop;R.H. Creamer
  20. J. Chem. Phys v.42 no.7 On the HIgh-Temperature Electrical Conductivity of Alumina D.W. Peters;L. Feinstein;Ch. Peltzer
  21. J. Chem. Phys v.41 no.8 Bulk Versus Surface Conductivity of MgO Crystals S.P. Mitoff
  22. Proc. Brit Ceram. Soc v.10 no.41 Problems Associated with the Measurements of the Volume Resistivity of Insulating Ceramics at High Temperature A.J. Moulson;P. Popper
  23. J. Phys. D(Appl. Phys) v.3 no.6 The Electrical Conductivity of Single-Crystal and Polycrystalline Aluminium Oxide O.T. Ozkan;A.J. Moulson
  24. Rev. Hautes Temp. Refract. v.1 no.1 Influence, Starting from 1,500°C, of Thermionic Emission on the Measurement of the Resistivity of Oxides J.P. Loup;A.M. Anthony
  25. J. Amer. Ceram. Soc v.47 no.3 Ionic Conductivity of Cubic Solid Solid Solutions in the System CaO-Y₂O₃-ZrO₂ D.W. Strickler;W.G. Carlson
  26. Z. Naturforsch. A v.14 no.8 Uber den Mechanismus Elektrischer Leitung in Oxidenhaleitern bei Hoheren Temperaturen J. Rudolf
  27. J. Electochem. Soc v.110 no.3 On the Defect Structreof ZrO₂and HfO₂ P. Kofstad;D.J. Ruzicka
  28. Metallurgical Thermochemistry O. Kubaschewski;E. LL. Evans;C.B. Alcock
  29. High Temp. High Press v.9 no.111 Relatives Chemisches Potential von Sauerstoff in Bezugselektroden aus den Zweiphasengemixschem Mn/MnO, Fe/FeO, Co/CoO, Ni/NiO,$Cu/Cu_2O$ und$Cr/Cr_2O_3$ S. Pyun;F. Muller
  30. J. Electrochem. Soc v.113 no.7 The Oxidation of Oxygen-Deficient Zirconia and Its Relationship to the Oxidation of Zirconium D.L. Douglass;C. Wagner
  31. J. Electrochem. Soc. v.117 no.3 Oxygen Diffusion in Monoelinic Zirconia D.J. Poulton;W.W. S,eltzer
  32. Oxid. Metals v.3 no.1 Diffusion of Oxygen in Zirconia as a Function of Oxygen Pressure F.J. Keneshea;D.L. Douglass
  33. Metallurg.Trans v.5 no.899 Ionic Conductivity of Solid Calcium Sulfide at 650 to 1,000°C K. Nagata;K.S. Goto