The Effects of Hot Isostatic Pressing on Microstructure and Properties of Sintered Lead Zirconate Titanate.
Abstract
The effects of hot isostatic pressing on the physical and electrical properties of sintered lead zirconate titanate are presented. Hot isostatic pressing for short times (<1 hour) with low applied pressures (6.9 - 20.7 MPa) at 1300 deg C is shown to produce lead zirconate titanate with a higher density than that obtained by conventional sintering techniques. Densification is shown to occur without an appreciable change in grain size. Localized microstructural inhomogenieties observed after pressing indicate the migration of a PbTiO3 - rich lead zirconate titanate liquid to pores during hot isostatic pressing. The rapid initial increase in density and shrinkage of macropores (approx. 100 micrometers in diameter) indicates that rearrangement and/or solution-precipitation initially control densification during hot isostatic pressing. A decreased rate of macropore shrinkage for extended pressing times indicates that solid state diffusion controls the later stage of pore shrinkage. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 30, 1982
- Accession Number
- ADA123527
Entities
People
- Kevin G. Ewsuk
Organizations
- Pennsylvania State University