Browse Prior Art Database

Determination of Gas Entrapment in Ceramic Slip

IP.com Disclosure Number: IPCOM000086272D
Original Publication Date: 1976-Aug-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Gardner, DG: AUTHOR [+4]

Abstract

In this method and apparatus, the gas entrapment in a liquid ceramic suspension prior to casting can be determined during its conditioning process.

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Determination of Gas Entrapment in Ceramic Slip

In this method and apparatus, the gas entrapment in a liquid ceramic suspension prior to casting can be determined during its conditioning process.

In the production of ceramic green sheet, by casting techniques, it is important that any gas entrapped within the suspension be removed prior to the casting process. A technique for removing the entrapped gas is to circulate the liquid ceramic suspension while removing any gas separated from the liquid. It is important to obtain a readout of the degree of gas entrapment, during this operation, so that it can be terminated as soon as possible.

In the apparatus illustrated, a container 10 is filled with liquid ceramic material which is circulated by pump 12 through lines 14 and 16. The liquid is also circulated through a density cell 18 which provides a readout on a digital voltmeter 20 through converter 22. A steady state readout of the specific gravity, as monitored by the density cell 18 and displayed by the voltmeter 20, will establish the level of the required liquid ceramic conditioning.

As the gas is removed from the ceramic liquid by the recirculation, the reading on the voltmeter 20 will change, indicating a change in the specific gravity. During this change, entrained gas bubbles produce a fluctuation in the reading. However, when all the bubbles have been removed, the reading is stabilized indicating no gas entrapment.

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