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SiO(2) Quantitative Analysis

IP.com Disclosure Number: IPCOM000079259D
Original Publication Date: 1973-Jun-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 16K

Publishing Venue

IBM

Related People

Gardner, RA: AUTHOR [+3]

Abstract

This method determines the SiO(2) content of high-temperature ceramic materials, by heating an appropriate sized sample, e.g., 100 mg. in a thermal gravimetric furnace device to approximately 1550 degrees C in a very dry hydrogen atmosphere. The silica, SiO(2), is entirely removed from the sample by the following reduction reaction: SiO(2) + H(2) ---------> SiO(2) + H(2)O.

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SiO(2) Quantitative Analysis

This method determines the SiO(2) content of high-temperature ceramic materials, by heating an appropriate sized sample, e.g., 100 mg. in a thermal gravimetric furnace device to approximately 1550 degrees C in a very dry hydrogen atmosphere. The silica, SiO(2), is entirely removed from the sample by the following reduction reaction: SiO(2) + H(2) ---------> SiO(2) + H(2)O.

The silica content is then determined by the difference between initial and final weights. The vaporized products of this reaction are carried away to a cooler part of the furnace, where the SiO(2) recombines with available oxygen to again form SiO(2). The method is exceedingly accurate and inexpensive, compared to conventional wet chemical techniques. This method is extendable to any other reducible refractory oxide.

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