Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
권호 표지

Microstructure and Electrical Properties in $Ta_2O_5$ doped Pb($Zr_{0.525}Ti_{0.475}$)$O_3$ Ceramics

$Ta_2O_5$를 첨가한 Pb($Zr_{0.525}Ti_{0.475}$)$O_3$ 계의 미세구조와 전기적 성질

  • 이응상 (한양대학교 무기재료공학과) ;
  • 길영배 (한양대학교 무기재료공학과)
  • Published : 1991.05.01
Download PDF
⟨ Previous Next ⟩

Abstract

The effects of Ta2O3 doping on the microstructure, electrical properties and thermal expansion in Pb(Zr0.525Ti0.475)O3 ceramics were studied. Density, average grain size, electromechanical coupling factor kp and thermal expansion coefficient of unpoled and poled samples were measured as a function of Ta2O5 content. Average grain size was decreased and density increased above 0.6 mol% Ta2O5 addition. In case of 0.2 mol% addition, density showed minimum according to grain growth. Dielectric constant and electromechanical coupling factor kp were the lowest in 0.2 mol% addition increased with Ta2O5 addition.

Keywords

References

  1. J Appl. Phys v.25 no.6 Piezoelectric Properties of Lead Zirconate-Lead Titanate Solidsolution Ceramics B. Jaffe;R.S. Roth;S. Marzullo
  2. J Appl. Physs. v.31 no.1 Variation in Ferroelectric Characteristics of Lead Zirconate Titanate Due to Minor Chemical Modifications R. Gersn
  3. 日本化學會誌 no.5 Compositional Fluctuation of Pb($Zr_xTi_{1-x}$)O₃near tetragonal-Rhombohedral Phase Boundary K. Kakegawa(et al.)
  4. Piezoelectric Ceramics B. Jaffe;W.R.Cook;H. Jaffe
  5. J. Appl. Phys. v.34 no.5 Thermal Expansion and Pyroelectricity in Lead Titanate Zirconate and Barium Titanate W.S. Cook(et al.)
  6. J. Am .Ceram Soc. v.43 no.3 Studies on Lead Titanate Ceramics Containing Niobium or Tantalium E.C. Subbarao
  7. 窯業協會誌 v.95 no.9 BaTiO₃の悅結に及ぼす$Ta_2O_5$の影響 N. Shikatani(et al.)
  8. J. Am. Ceram. Soc. v.62 no.11 Grain Size Depedence of Spontaneous Cracking in Ceramics R.W. Rice;R.C. Pohanka
  9. Solid State Comm. v.24 A Compositional Fluctuation and Properties of Pb(Zr,$T_1$)O₃ K. Kakegawa;J. Mohrt