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Surface Reduction Of Barium Titanate Crystals

IP.com Disclosure Number: IPCOM000097646D
Original Publication Date: 1961-Mar-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 17K

Publishing Venue

IBM

Related People

Turnbull, RC: AUTHOR

Abstract

Surface conducting layers 10 and 12 in intimate contact with a barium titanate single crystal 14 are produced by a reduction process with carbon monoxide. The reducted layers act as electrodes and do not exhibit the interfacial interferences common to applied electrodes.

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Surface Reduction Of Barium Titanate Crystals

Surface conducting layers 10 and 12 in intimate contact with a barium titanate single crystal 14 are produced by a reduction process with carbon monoxide. The reducted layers act as electrodes and do not exhibit the interfacial interferences common to applied electrodes.

The process is carried out by placing the barium titanate crystal in an atmosphere of carbon monoxide and applying heat for a time sufficient to cause the surface to become reduced and conducting. This is not done long enough to allow reduction of the interior of the crystal or diffusion of the reduced ions into the interior of the crystal.

A large molecule reducing agent such as carbon monoxide is used in order to prevent diffusion into the bulk of the crystal. The process is carried out by mounting the crystal in a glass tube on a graphite support. Carbon monoxide is passed over the crystal surfaces which are heated for 30 to 60 seconds by properly focused light beams.

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