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Fabrication, Mechanical Properties, and Electrical Conductivity of Co 3 O 4 Ceramics
Author(s) -
Sakamoto Shinichi,
Yoshinaka Masaru,
Hirota Ken,
Yamaguchi Osamu
Publication year - 1997
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1997.tb02824.x
Subject(s) - ceramic , materials science , hot pressing , hot isostatic pressing , electrical resistivity and conductivity , fracture toughness , vickers hardness test , fabrication , composite material , pressing , conductivity , sintering , mineralogy , microstructure , chemistry , medicine , alternative medicine , pathology , electrical engineering , engineering
Well‐densified Co 3 O 4 ceramics (98.3% of theoretical) have been fabricated by the combined use of hot pressing (800°C/I h/30 MPa) and hot isostatic pressing (880°C/2 h/196 MPa). Their Vickers hardness and fracture toughness are 10.3 GPa and 4.2 MPa·m 1/2 , respectively. They exhibit a high electrical conductivity of 3.35 × 10′ S·cm −1 at 800°C.