New solid-state electrochemical method of measuring dissolved hydrogen in Al melt

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A novel solid state electrochemical sensor having a heterojunction structure consisting of a solid proton conductor and a solid oxygen-ion conductor has been developed to measure hydrogen dissolved in aluminum melt. The sensor measures hydrogen concentration with reference to an oxygen at a reference compartment. To fix the oxygen partial pressure, two different methods were used. Either a mixture of CuO and Cu2O or else oxygen gas in air were employed to maintain a constant oxygen partial pressure at the reference electrode. The sensing mechanism of the heterojunction sensor is discussed and the characteristics of the sensor are reported in a hydrogen gas atmosphere at temperature ranging from 650 to 800 degrees C. The heterojunction hydrogen sensor was packaged and dipped into aluminum melt to measure hydrogen content during gassing and degassing processes. (C) 2016 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE SA
Issue Date
2017-02
Language
English
Article Type
Article
Keywords

SRCEO3-BASED PROTON CONDUCTOR; REFERENCE ELECTRODE; MOLTEN ALUMINUM; SENSORS; METALS

Citation

SENSORS AND ACTUATORS B-CHEMICAL, v.239, pp.374 - 382

ISSN
0925-4005
DOI
10.1016/j.snb.2016.08.012
URI
http://hdl.handle.net/10203/220105
Appears in Collection
MS-Journal Papers(저널논문)
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