Hot isostatic pressing and characterization of sol-gel-derived chromium(III) oxide
Journal Article
·
· Journal of the American Ceramic Society
- Doshisha Univ., Kyoto (Japan). Dept. of Molecular Science and Technology
Chromium(III) oxide (Cr{sub 2}O{sub 3}) crystallizes at low temperatures from an amorphous material prepared by adding hydrazine monohydrate to an aqueous solution of Cr(NO{sub 3}){sub 3}{center_dot}9H{sub 2}O. Individual particles of Cr{sub 2}O{sub 3} tend toward a hexagonal morphology above 800 C. Well-densified Cr{sub 2}O{sub 3} pellets (98.8% of theoretical density) have been fabricated by hot isostatic pressing for 2 h at 1,100 C and 196 MPa. Their fracture toughness is 4.4 MPa{center_dot}m{sup 1/2}. The sample annealed in air for 12 h at 1,300 C exhibits a high electrical conductivity of 3.6 {Omega}{sup {minus}1}{center_dot}m{sup {minus}1} at 700 C.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 106023
- Journal Information:
- Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 8 Vol. 78; ISSN 0002-7820; ISSN JACTAW
- Country of Publication:
- United States
- Language:
- English
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