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Preparation of bulk Si3N4 from tape casting and lamination

  • Jingxian Zhang*
  • , Feng Ye
  • , Dongliang Jiang
  • , Mikio Iwasa
  • *Corresponding author for this work
  • National Institute of Advanced Industrial Science and Technology
  • Harbin Institute of Technology
  • CAS - Shanghai Institute of Ceramics

Research output: Contribution to journalArticlepeer-review

Abstract

Si3N4 samples were prepared by tape casting, laminating and hot pressing (HP)/spark plasma sintering (SPS). Initially, the as-received Si3N4 powders were chemically treated to improve the dispersion in aqueous media. After surface treatment, a decrease in zeta potential was observed in the basic region. Rheological measurements showed that 40 vol.% Si3N4 slips exhibited a well deflocculated state in the presence of the sintering additives. After the addition of binder and plasticizer, Si3N4 slurries exhibited a shear thinning behavior. The dried green sheets were smooth and homogeneous on both sides. The Si3N4 samples were densified by HP and SPS. A good homogeneity is observed and no single layers can be distinguished in the fracture surface. The mechanical properties were also studied.

Original languageEnglish
Pages (from-to)277-282
Number of pages6
JournalCeramics International
Volume32
Issue number3
DOIs
StatePublished - 2006
Externally publishedYes

Keywords

  • A. Tape casting
  • D. SiN
  • Rheology
  • Zeta potential

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