Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Low-Temperature Sinterbility of Semiconducting $BaTiO_3$ Ceramics with $Pb_5Ge_3O_11$ Additives

$Pb_5Ge_3O_11$에 의한 반도성 $BaTiO_3$ 세라믹스의 저온소결성

  • 윤상옥 (강릉대학교 재료공학과) ;
  • 정형진 (한국과학기술원 세라믹스부) ;
  • 윤기현 (연세대학교 요업공학과)
  • Published : 1991.05.01
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Abstract

The effects of Pb5Ge3O11 on the sinterbility and lattice variation of the semiconducting 0.15 mol% Y2O3 doped BaTiO3 have been investigated as functions of additive contents (from 0.25 mol% to 2.5 mol%) and sintering temperatures (from 110$0^{\circ}C$ to 130$0^{\circ}C$). As the amount of Pb5Ge3O11 increases, the sinterbility of BaTiO3 increases abruptly at around 115$0^{\circ}C$. During the sintering, the most of Pb+2 ions in additives penetrate into BaTiO3 lattices and Ge+4 ions present at grain boundaries. Therefore the c lattice of the BaTiO3 increases largely and then the tetragonality increases due to the diffusion of the Pb+2 ions.

Keywords

References

  1. Piezoelectric Ceramics B. Jaffe;W.R. Cook Jr.;H. Jaffe
  2. J Phys. Soc. Jpn. v.20 no.4 Oxidation Phenomena in Semiconducting BaTiO₃ I. Ueda;Ikegami
  3. Philips Res. Rep. v.5 no.6 Controlled Valancy Semiconductors E.J.W. Verwey;P.W. Haaijman(et al.)
  4. J. Phys. Soc. Jpn. v.14 no.9 Semiconducting Bodies in the Family of Barium Titanates O. Saburi
  5. Am. Ceram. Soc. Bull. v.47 no.3 PTCR Behavior of BaTiO₃with $Nb_2O_5$ and MnO₂Additives Y. Matsuo;M. Fujimura;H. Sasaki(et al.)
  6. Am.Ceram.Soc.Bull. v.63 no.2 Electrical Properties of Semiconducting BaTiO₃by Liquid-phase Sintering W.Y. Howng;C. McCutchon
  7. US Patent v.4 no.384 Semiconductive Barium Titanate S. Kamigito;T. Hioki(et al.)
  8. US Patent v.4 no.158 Heterophasic Ceramic Capacitor D.A.Payne;S.M.Park
  9. Am. Ceram Soc Bull. v.62 no.2 Low-firing Capacitor Dielectrics in the System Pb($Fe_{2/3}W_{1/3}$)O₃-Pb($Fe_{1/2}Nb_{1/2}$)O₃-$Pb_5Ge_3O_{11}$ S.J. Jang;W.A. Schulze;J.V. Biggers
  10. Mat. Res. Bull. v.14 no.5 Piezoelectric Properties of $Pb_5Ge_3O_{11}$ Bonded PZT Composites W.A. Schulze;J.V. Biggers
  11. J Elect Mat v.6 no.2 Formation of Secondary Phases During Crystal Growth of $Pb_5Ge_3O_{11}$ W.K. Zwicker;M. Delino(et al.)
  12. J Mat. Sci. v.8 no.1725 Phase Relations and Crystallization of Glass in the System PbO-GeO₂ H. Hasegawa;M. Shimada;M. Koizumi
  13. ASTM standard C373-72
  14. J. Mat. Sci. v.23 no.1 Structure and Dielectric Studies in the($Ba_{0.9}Ca_{0.1}$)($Ti_{1-x}Sn_x$)O₃System K.H. Yoon;J.H. Kim;K H. Jo;S O Yoon(et al.)
  15. Ph.D Thesis, Univ. of Illinois Liqund Phase Sintering of Heterophasic Dielectric in the System Barium Titanate-lead(5) Germanjum(3) Oxygen(11) S.M. Park
  16. Elements of X-ray Diffraction B.D. Cullity
  17. Ph.D. Thesis, Yonsei University Low Temperature Sintering and Electrical Properties of Semiconducting BaTiO₃Ceramics and Interfacial Analysis by the Complex Impedance Resonance Method S.O. Yoon