HOT ISOSTATIC PRESSING AND CHARACTERIZATION OF SOL-GEL-DERIVED CHROMIUM(III) OXIDE

Authors
KAWABATA A YOSHINAKA M HIROTA K YAMAGUCHI O
Citation
A. Kawabata et al., HOT ISOSTATIC PRESSING AND CHARACTERIZATION OF SOL-GEL-DERIVED CHROMIUM(III) OXIDE, Journal of the American Ceramic Society, 78(8), 1995, pp. 2271-2273
Citations number
11
Categorie Soggetti
Material Science, Ceramics
Journal title
Journal of the American Ceramic Society → ACNP
ISSN journal
00027820
Volume
78
Issue
8
Year of publication
1995
Pages
2271 - 2273
Database
ISI
SICI code
0002-7820(1995)78:8<2271:HIPACO>2.0.ZU;2-M
Abstract
Chromium(III) oxide (Cr2O3) crystallizes at low temperatures from an a morphous material prepared by adding hydrazine monohydrate to an aqueo us solution of Cr(NO3)(3). 9H(2)O. Individual particles of Cr2O3 tend toward a hexago nal morphology above 800 degrees C. Well-densified Cr2 O3 pellets (98.8% of theoretical density) have been fabricated by hot isostatic pressing for 2 h at 1100 degrees C and 196 MPa. Their fractu re toughness is 4.4 MPa . m(1/2). The sample annealed in air for 12 h at 1300 degrees C exhibits a high electrical conductivity of 3.6 Ohm-1 .m(-1) at 700 degrees C.