Pulse electric current sintering of alumina ceramics using γ -alumina powders prepared by the sol-gel method

DOI

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Other Title
  • ゾルゲル法により調製したγ-アルミナ粉末を用いるアルミナのパルス通電焼結

Description

Alumina ceramics were densified by pulse electric current sintering (PECS) using γ-alumina powders prepared from polyhydroxoaluminum-polyvinylalcohol (PHA-PVA) composite gels at sintering dtemperatures of 1250∼1550°C. PECS conditions and optimizing of calcining temperature of PHA-PVA gels were investigated. The rapid sintering by PECS was advantageous to enhance densification in the sintering of γ-alumina powders prepared from PHA-PVA gels, resulting in specimens with a relative density of more than 99% for holding time of 3 min under uniaxial pressure of 30 MPa. The use of monophasic γ-alumina powders made the sintering temperature shift to lower temperatures. The bending strength of sintered compacts fired at 1350°C reached a value as high as about 800 MPa when the sample powders were calcined at 850∼950°C.

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Details 詳細情報について

  • CRID
    1390282680590586240
  • NII Article ID
    130006969895
  • DOI
    10.14853/pcersj.2002f.0.161.0
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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