Hostname: page-component-5cf477f64f-54txb Total loading time: 0 Render date: 2025-04-03T05:23:41.146Z Has data issue: false hasContentIssue false
  • English
  • Français

New Processing and Evaluation of Porous PZT with High Connectivity Using Capsule-Free O2 HIP

Published online by Cambridge University Press:  15 February 2011

Sunao Sugihara ,
Takashi Hayashi  and
Kiyoshi Okazaki
Sunao Sugihara
Affiliation:
Shonan Institute of Technology, Department of Materials Science and Ceramic Technology, Tujido-Nishikaigan, Fujisawa, Japan, 251
Takashi Hayashi
Affiliation:
Shonan Institute of Technology, Department of Materials Science and Ceramic Technology, Tujido-Nishikaigan, Fujisawa, Japan, 251
Kiyoshi Okazaki
Affiliation:
Shonan Institute of Technology, Department of Materials Science and Ceramic Technology, Tujido-Nishikaigan, Fujisawa, Japan, 251
Get access

Abstract

New processing of porous PZT ceramics with high connectivity was investigated using capsule-free O2 HIP technology. Porous PZT bodies were prepared by pressureless-sintering of green compacts with various amounts of spherical PMMA particles, followed by hot isostatically pressed at 1100°C and 200 MPa for 1 hour in 5%O2/Ar mixture gas atmosphere. The densification of porous PZT sintered bodies hardly occurred by capsule-free O2 treatment, resulting in the formation of well-developed neck growth between PZT grains. They exhibted a homogeneous microstructure with a bimodal pore size distribution consisting of both several ¼m and 50–80¼m pore sizes.

The capsule-free O2 HIPed porous PZT bodies have a larger permittivity and a smaller depolarizing factor about a half than the specimens before O2 -HIPing, suggesting that the HIPed PZT has a higher connectivity. Piezoelectric g33 constant-porosity relations were also described and mechanical property was discussed to indicate an increase of bending strength more than 20% compared to conventional sintering.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 251: Symposium S – Pressure Effects on Materials Processing and Design , 1991 , 127
Copyright
Copyright © Materials Research Society 1992

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

[1] Skinner, D.P,Newham, R.E. and Cross, L.E.:Mater.Res.Bull.,13, 599(1978).CrossRefGoogle Scholar
[2] Miyashita, M,Takano, K. and Toda, T.:Ferroelectrics,28,397(1980).CrossRefGoogle Scholar
[3] Nagata, K.,Igarashi, H., Okazaki, K. and Bradt, R.C:J.Appl.Phys., 19–1,L–37(1980).Google Scholar
[4] Takata, A.,Ishizaki, K. and Okada, S.:Mat.Res.Soc.Sym.Proc.,207, 135(1991).CrossRefGoogle Scholar
[5] Okazaki, K. and Igarashi, H.:Ceramic Microstructure'76,(Westview Press, Boulder,Colorado,1976), P.564.Google Scholar
[6] Igarashi, H.,Tashiro, S. and Okazaki, K.:Mem.Nat.Def.Acad.,19_. 87, No.2,3,4(1979).Google Scholar