Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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(Ba1-xCax)(Ti1-yZry)O3 Powder Synthesis Via Hydrothermal Treatment

  • Published : 2002.01.01
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Abstract

$(Ba_{1-x}Ca_x)(Ti_{1-y}Zr_y)O_3(BCTZ)$ powders for the Ni-electrode Multilayer Ceramic Capacitor(MLCC) were synthesized via hydrothermal treatment using mixed aqueous solutions of $BaCl_2{\cdot}2H_2O,\Ca(NO_3)2{\cdot}4H_2O,\ ZrOCl_2{\cdot}8H_2O$ and $TiCl_4$. Two component and three component systems were also extensively studied for basic data. BT, CT and BZ powders were crystalline but CZ was determined to be amorphous under the same synthetic condition. In BTZ system, Zr and Ti were completely soluble and Ca would be substituted for Ba up to ∼6 mol% in BCT. The submicron-sized $(Ba_{0.95}Ca_{0.05})(Ti_{0.80}Zr_{0.20})O_3$ powder of the target composition was successfully synthesized at $150{\circ}$ for 12h.

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References

  1. D. F. K. Henning, 'Dielectric Materials for Sintering in Reducing Atmospheres,' J. Euro. Ceram. Soc., 21 1637-42(2001) https://doi.org/10.1016/S0955-2219(01)00082-6
  2. I. Brun and G. H. Maher, 'High Resistivity BaTi$O_3$ Ceramics Sintered in CO-$CO_2$, Atmosphere,' J. Mater. Sci., 10 [4]633-40 (1975) https://doi.org/10.1007/BF00566571
  3. I. Burn. 'Ceramic Disk Capacitors with Base-metal Elec-trode,' Am. Ceram. Soc. Bull. 57 [6] 600-04 (1978)
  4. Y. H. Han, J. B. Appleby and D. M. Smith, 'Calcium as an Acceptor Impurity in $BaTiO_3$,' J. Am. Ceram. Soc., 70 [2] 96-100 (1987) https://doi.org/10.1111/j.1151-2916.1987.tb04936.x
  5. Y. Sakabe, K. Minai and K. Wakino, 'High-dielectric Constant Ceramics for Base Metal Monolithic Capacitors(inJpn.),'Jpn. J. Appl. Phys., 20 [4] 147-50 (1987)
  6. Y. Hwang, Y. H. Kim and S. J. Park, 'The Role of Calcium as a Reduction Inhibitor in $BaTiO_3$,' J. Kor. Ceram. Soc. 27 [6] 741-46 (1990)
  7. I. Burn, 'Mn-doped Polycrystalline $BaTiO_3$,' J. Mater. Sci., 14 2453-58 (1979) https://doi.org/10.1007/BF00737036
  8. W. H. Lee, D. Hennings and Y. C. Lee, 'Effect of Dy Doping on Resistance Degreadation of (Ba)(Ti,Zr)$O_3$ Sintered in Reducing Atmosphere under Highly Accelerated Life Test (in Jpn.),' J. Ceram.Soc.Jpn.,10[10]823-28(2001)
  9. Y. Sakabe, 'Dielectric Materials for Base Metal Multilayer Ceramic Capacitors,' Am. Ceram. Soc. Bull.. 66 [9] 1338-41(1987)
  10. Z. Q. Zhuang, M. P. Harmer, D. M. Smyth and R. E. Newn-barn, 'The Effect of Octahedrally-coordinated Calcium on the Ferroelectric Transition of $BaTiO_3$,' Mat. Res. Bull., 22 100-03 (1987)
  11. D.F.K.Hennings and H. Schreinemacher, 'Ca-acceptors in Dielectric Ceramics Sintered in Reducive Atmospheres.' J. Euro. Ceram. Soc., 15 795-800 (1995) https://doi.org/10.1016/0955-2219(95)00043-T
  12. I. MacLaren and C. B. Ponton, 'A TEM and HREM Study of Particle Formation during Barium Titanate Synthesis in Aqueous Solution,' J. Euro. Ceram. Soc., 20 1267-75 (2000) https://doi.org/10.1016/S0955-2219(99)00287-3
  13. Ch. Beck, W. $H\ddot{a}rtl$ and R. Hempelmann, 'Size-controlled Synthesis of Nanocrystalline $BaTio_3$ by a Sol-gel Type Hydrolysis in Microemulsion-provided Nanoreactors,' J. Mater. Res., 13 [11] 3174-80 (1998) https://doi.org/10.1557/JMR.1998.0431
  14. W. J. Dawson, 'Hydrothermal Synthesis of Advanced Ceramic Powders,' Am. Ceram. Soc. Bull., 67 1673-78 (1988)
  15. S. Hirano, 'Hydrothermal Processing of Ceramics,' Am Ceram. Soc. Bull., 66 1342-44 (1987)
  16. L. Zhao, A. T. Chien, F. F. Lange and J. S. Speck, 'Micro-structural Development of $Baio_3$ Powder Synthesized by Aqueous Methods,' J. Mater. Res., 11 [6] 1325-28 (1996) https://doi.org/10.1557/JMR.1996.0167
  17. Y. S. Her and E. Matijevic, 'Preparation of Well-defined Colloidal Barium Titanate Crystal by the Controlled Double Jet Precipitation,' J. Mater. Res., 10 [12] 3106-14 (1995) https://doi.org/10.1557/JMR.1995.3106
  18. B. D. Cullity and S. R. Stock, Element of X-Ray Diffraction, 3rd ED., pp. 167-71, Prentice Hall, Inc., New Jersey (2001)
  19. I. S. Seog and C. H. Kim, 'Preparation of Monodisperse Spherical Silicon Carbide by the Sol-gel Method,' J. Mater. Sci., 28 3277-82 (1993) https://doi.org/10.1007/BF00354247
  20. Y. T. Moon, H. K. Park, D. K. Kim, I. S. Seog and C. H. Kim, 'Preparation of Monodisperse and Spherical Zirconia Powders by Heating of Alcohol-aqueous Solutions,' J. Am. Ceram. Soc., 78 [10] 2690-94 (1996) https://doi.org/10.1111/j.1151-2916.1995.tb08042.x
  21. J. L. Look and C. F. Zukoski, 'Shear Induced Aggregation during the Precipitation of Titanium Alkoxides,' J. Colloid. Interface Sci., 153 [2] 469-82 (1992)
  22. J. L. Look and C. F. Zukoski, 'Colloidal Stability and Tita nia Precipitate Morphology: Influence of Short-range Repulaions,' J. Am. Ceram. Soc., 78 [1] 21-32 (1995) https://doi.org/10.1111/j.1151-2916.1995.tb08356.x
  23. R. J. Hunter, 'Foundation of Colloid Science,' Clarendon Press, Oxford, UK, 443 (1987)
  24. Y. Xu, 'Ferroelectric Materials and Their Applications,' p. 135, North-Holland (1991)