Effect of SiO2additive on the mechanical and dielectric properties of PZFNTU ceramics

Haitao Huang, Peter Hing

Research output: Journal article publicationJournal articleAcademic researchpeer-review

5 Citations (Scopus)

Abstract

Composite of Pb(Zr0.58Fe0.20Nb0.20Ti0.02)0.994U0.006O3(PZFNTU) ceramics with SiO2additive has been prepared by the conventional powder processing method. Microhardness, flexural strength, and the dielectric properties of the sintered material have been studied. It is found that a small amount of SiO2improves the flexural strength, the microhardness and the dielectric constant of the sintered PZFNTU ceramics. It is also found that the fracture mode changes from intergranular to essentially transgranular with the small amount of SiO2. For large amount of SiO2additives, the sintered ceramics are more porous and the strength and hardness values are also low. For ceramics with small amount of SiO2additives, the structure is purely perovskite while for large amount of SiO2additives, pyrochlore phases are detected.
Original languageEnglish
Pages (from-to)291-296
Number of pages6
JournalFerroelectrics
Volume229
Issue number1-4
DOIs
Publication statusPublished - 1 Jan 1999
Externally publishedYes

Keywords

  • Dielectric constant
  • Ferroelectric ceramics
  • Flexural strength
  • Microhardness

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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