# US 4,376,029 A · Titanium diboride-graphite composits

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- Number: US 4,376,029 A
- Document ID: US4376029A
- Status: Granted
- Kind: A
- Application number: 06/186,181
- Filed: 1980-09-11
- Granted: 1983-03-08
- Earliest claimed: 1980-09-11
- Assignees: Great Lakes Carbon Corporation
- Inventors: Louis A. Joo'; Kenneth W. Tucker; Frank E. McCown
- Web page: https://patentgrep.com/patent/US4376029A

## CPC

- C04B 35/58071: {based on titanium borides}
- C04B 35/52: based on carbon, e.g. graphite
- C04B 35/532: containing a carbonisable binder
- C25C 3/08: Cell construction, e.g. bottoms, walls, cathodes
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE
- C25C: PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR

## Abstract

A cathode component for a Hall aluminum cell is economically produced from a mixture of a carbon source, preferably calcined petroleum coke, and optionally calcined acicular needle petroleum coke, calcined anthracite coal; a binder such as pitch including the various petroleum and coal tar pitches; titanium dioxide, TiO.sub.2 ; and boric acid, B.sub.2 O.sub.3 or boron carbide, B.sub.4 C; forming said mixture into shapes and heating to a TiB.sub.2 -forming temperature.

## Claims

### Claim 1

A process for the production of TiB.sub.2 -carbon composite comprised of the steps of mixing and dispersing particulate carbonaceous matter and TiB.sub.2 -forming reactants in a carbon-forming binder to form a plastic mixture, forming a shaped article from said mixture, baking said article at 700.degree. to 1100.degree. C., impregnating said baked article with a carbon-forming binder and rebaking said article to 700.degree. to 1100.degree. C.

### Claim 2

A process for the production of a TiB.sub.2 -carbon composite article comprised of the steps of mixing and dispersing particulate carbonaceous matter and TiB.sub.2 -forming reactants in a carbon-forming binder to form a plastic mixture, forming a shaped article from said mixture, baking said article to 700.degree. to 1100.degree. C., heating said article to a TiB.sub.2 -forming temperature from 2000.degree. to 3000.degree. C. wherein the composite article is impregnated with a carbon-forming binder and is re-baked to 700.degree. to 1100.degree. C.

### Claim 3

A process for the production of a TiB.sub.2 -carbon composite article comprised of the steps of mixing and dispersing particulate carbonaceous matter and TiB.sub.2 -forming reactants in a carbon-forming binder to form a plastic mixture, forming a shaped article from said mixture, baking said article to 700.degree. to 1100.degree. C., further heating said article to a TiB.sub.2 -forming temperature of 2000.degree. to 3000.degree. C. wherein the composite article is then impregnated with a carbon-forming binder, re-baked to 700.degree. to 1100.degree. C. and re-heated to 2000.degree. to 3000.degree. C.