Graphite electrodes and their production

US5413738A · kind A · utility

Assignee

• UCAR Carbon Technology Corporation · US

Inventors

• Irwin C. Lewis · Strongsville, US
• Ronald A. Howard · Brook Park, US

Key dates

• Filing date: Oct 22, 1985
• Grant date: May 9, 1995
• Expiry date: Oct 22, 2005

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31815
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A unitary composite structure having improved flexural strength and a reduced coefficient of thermal expansion comprising a heterogeneous combination of a carbonaceous reinforcing material interbonded with a matrix material, wherein the said matrix material is a poorly graphitizing carbonaceous pitch containing polymerized and cross-linked aromatic components is disclosed. Graphite electrodes comprised of the poorly graphitized pitch matrix material acting as a binder and/or an impregnant are also disclosed. Processes for the preparation of the poorly graphitizing pitch, the composite structure, and particularly the graphite electrodes are disclosed as well.