Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
권호 표지

PTCR Effects in Molten Salt System Synthesized Semiconductive $BaTiO_3$

용융염 합성법에 의한 반도성 $BaTiO_3$의 PTCR 효과

  • 윤기현 (연세대학교 공과대학 요업공학과) ;
  • 오기영 (연세대학교 공과대학 요업공학과)
  • Published : 1985.03.01
Download PDF
⟨ Previous Next ⟩

Abstract

Semiconductive $Ba_{0.9}Sr_{0.1}TiO_3$ was prepared by both the Calcining of mixed Oxides (C. M. O) and the Molten Salt Synthesis(M.S.S) methods to investigate the PTCR effects. In the Molten Salt Synthesis method the temperature of calcination for Synthesis of $BaTiO_3$ could be lowered from 110$0^{\circ}C$ to 80$0^{\circ}C$. The M.S.S Specimens had smaller grain size and more homogeneous size distribution at the same sintering temperature as compared with the C. M. O specimens. The M. S. S. specimens showed greater PTCR effects and current variations in the time vs. current charac-teristics than those of C. M. O Specimens.

Keywords

References

  1. Electronic Applications v.26 no.3 Properties and Applications of PTC Thermistors E.Andrich
  2. Philips Tech. Rev. v.26 Investigations on BaTiO₃semiconductors E.Andrich;K.H.Hardtl
  3. Am. Ceram. Soc. Bull. v.42 no.5 Yttrium-Doped Ferroelectric Solid Solutions with Positive Temperature Coefficients of Resistance Y.Ichikawa;W.G.Carlson
  4. J. Phys. Soc. Jpn. v.14 no.9 Properties of Semiconductive Barium Titannates O.Saburi
  5. J. Am. Ceram. Soc. v.44 no.2 Semiconducting Bodies in the Family of Barium Titanate O.Saburi
  6. J. Am. Ceram. Soc. v.47 no.10 Resistivity Anomaly in Doped Barium Titanates W.Heywang
  7. J. Am. Ceram. Soc. v.44 no.5 Possible Explanation of Positive Temperature Coefficient in Resistivity of Semiconducting Ferroelectrics W.T.Peria;W.R.Bratschun;R.D.Fenity
  8. Am. Ceram. Soc. Bull. v.50 no.8 Effect of Heat-Treatment on the PTCR Anomaly in Semiconducting Barium Titanate M.Kahn
  9. J. Am. Ceram. Soc. v.64 no.12 Influence of stoichiometry on the PTCR Effect in porous Barium Tritanate Ceramics M.Kuwabara
  10. Yogyo-Kyakai-Shi v.90 no.8 Some facters Affecting the Magnitude of the PTCR Effect in Semiconducting Barium Titanates M.Kuwabara
  11. Mat. Res. Bull. v.14 Lead Zirconate Ceramics from Molten Salt Solvent Synthesized Powders R.H.Arendt;J.H.Rosolowski;J.W.Szyaszek
  12. J. Am. Ceram. Soc. v.66 no.10 Characterization and Sintering of PZT powders S.H.Cho;J.V.Biggers
  13. Trans. J. Brit. Ceram. Soc. v.74 no.5 Effect of Additions on the sinterability of Barium Titanate M.N.Swilam;A.M.Gadalla
  14. J. Am. Ceram. Soc. v.54 no.9 Influence of Grain Growth on Dielectric Properties of Nb-Doped BaTiO₃ M.Kahn
  15. Philips Res. Report v.5 Controlled-Valency Semiconductors Verwey, E.J.W.(et al.)
  16. J. Am. Ceram. Soc. v.64 no.11 Effect of Microstructure on the PTCR Effect in Semiconducting Barium Titante Ceramics M.Kuwabara