Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
권호 표지

Effects of Excess PbO and Ball-Milling on the Microstructure, Sintering Behavior and Mechanical Properties of PZT Ceramics

과잉 PbO 첨가 및 미분쇄에 의한 PZT 압전세라믹스의 미세구조제어와 소결특성 및 기계적 성질

  • Published : 1995.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

Pb(Zr0.53Ti0.47)O3 (PZT) ceramics having different microstructures were fabricated at low temperatures using calcined PZT powders with addition of excess PbO powder and/or ball milling. The effects of excess PbO and ball milling time on the microstructure, the sintering characteristic, and the mechanical properties of these ceramics were studied. Fine powders with average particle size of 0.38㎛ could be obtained by ball milling with 2.5 mm Ф zirconia balls for 120 hours. By the addition of 2mol% of excess PbO to these powders, it was possible to obtain well-densitified PZT ceramics at low sintering temperature of 980℃. Densification behavior of PZT was affected by the addition of excess PbO powder, while, grain growth was hardly affected by PbO addition. It was observed that Vicker's hardness decreased and fracture toughness increased with the increasing amount of PbO. At 1mol% excess PbO, it was shown that the minimum values of hardness and maximum fracture toughness were achieved. In addition, with increasing sintering time, the fracture toughness decreased and the hardness increased.

Keywords

References

  1. Am. Ceram. Soc. Bull. v.63 no.9 Mechanical Behavior of Ferroeleciric Ceramics K. Okazaki
  2. J. Am. Ceram. Bull. v.60 no.4 Errect of Processing on Microsrtucture and Peoperties of PZT Cerams S.S. Chiang;M. Nishioka;R.M. Fulrath;J.A. Pask
  3. J. Am. Ceram. Soc. v.66 no.4 Sintering of PZT Ceramics:Ⅱ,Effect of PbO Content on Densification Kinetics A.I. Kingon;J.B. Crark
  4. Jpn. J. Appl. Phys. v.28-2 no.SUP. Microstructure of PZT Ceramics Synthesized by Partial Oxalate Method T. Yamamoto;R. Tanaka;K. Okazaki;T. Ueyama
  5. Ferroelectric v.41 Effects of Impurity Doping in Lead Zirconate Titanate Ceramics Takahashi
  6. J. Am. Ceram. Soc. v.72 no.5 Effect of Excess PbO on the Densification of PLZT Ceramecs B.M. Song;D.Y. Kim;S. Shirasaki;H. Yamamura
  7. J. Am. Ceram. Soc. v.50 no.5 Effect of PbO Densification on the Piezoelectric Properties of Lead-Zirconia Titanate Ceramics A.H. Webster;T.B. Weston;N.F.H. Bright
  8. J. Ceram. Soc. Jpn. v.96 no.5 Sintering of Submicron Pb(Zr,Nb,Fe,W)O₃ Powders and Dieletric Properties of the Ceramics Fabricated Therefrom S. Tashro;Y. Tsuji;H. Igarashi
  9. KS B 0811 비커스경도 실험방법 한국공업규격
  10. J. Am. Ceram. Soc. v.59 Fracture Thoughness Determined by Indentation A.G. Evans;E.A. Charales
  11. J. Am. Ceram. Soc. v.64 A Critical Evaluation of Indentation Techniques for Measuring Fracture Thoughness: Ⅰ. Direct Crack Measurement G.R. Anstis;P. Chantikul;B.R. Lawn;D.B. Marshall
  12. JIS R 1607