Hydrogen measurement sensor having junction structure of solid oxygen ion conductor and solid hydrogen ion conductor in molten metal

Patent metadata

Field	Value
Publication number	US-9366646-B2
Application number	US-201214382606-A
Country	US
Kind code	B2
Filing date	Dec 6, 2012
Priority date	Mar 14, 2012
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

Abstract

Provided is a hydrogen measurement sensor capable of monitoring a content of hydrogen within molten metal in real-time using an aluminum or magnesium alloy casting method, and, more particularly, a hydrogen measurement sensor having a junction structure of a solid oxygen ion conductor and a solid hydrogen ion conductor in molten metal capable of measuring a content of hydrogen within aluminum-magnesium alloy-molten metal using a new method which generates a fixed concentration of oxygen gas from a solid reference material at a high temperature by replacing a reference material of a standard gas method which is difficult to handle with a solid reference material or external air which is easy to handle or has the same effect as that of the gas reference material by using a feature in which the external air contains a predetermined pressure (0.21 atm) of oxygen.

First claim

The invention claimed is:

1. A hydrogen measurement sensor having a junction structure of a solid oxygen ion conductor and a solid hydrogen ion conductor in molten metal, comprising:
an oxygen ion conductor whose inside is hollow and one portion is open;
a hydrogen ion conductor coupled with an outer side of the oxygen ion conductor;
a measurement metal electrode formed at an outer side of the hydrogen ion conductor;
a reference metal electrode formed inside the oxygen ion conductor; and
voltage measurement wires connected to the measurement metal electrode and the reference metal electrode, respectively.

2. The hydrogen measurement sensor of claim 1 , wherein the oxygen ion conductor is made of a solid electrolyte including zirconia ZrO 2 or a solid electrolyte in which GdO 3 is added to CeO 2 -based materials.

3. The hydrogen measurement sensor of claim 2 , wherein the zirconia ZrO 2 is any one selected from the group consisting of yttria stabilized zirconia (YSZ), calcium stabilized zirconia (CSZ), and magnesium stabilized zirconia (MSZ).

4. The hydrogen measurement sensor of claim 3 , further comprising: a ceramic tube which is closed by being coupled to the oxygen ion conductor or the hydrogen ion conductor at a lower end thereof and opened at an upper end thereof.

5. The hydrogen measurement sensor of claim 2 , further comprising: a ceramic tube which is closed by being coupled to the oxygen ion conductor or the hydrogen ion conductor at a lower end thereof and opened at an upper end thereof.

6. The hydrogen measurement sensor of claim 1 , wherein the hydrogen ion conductor is a compound in which other materials are substituted into place B of a material having an ABO 3 type perovskite structure, the compound being selected from the group consisting of CaZrO 3 -based compounds, SrZrO 3 -based compounds, SrCeO 3 -based compounds, BaCeO 3 -based compounds, BaTiO 3 -based compounds, SrTiO 3 -based compounds, and PbTiO 3 -based compounds.

7. The hydrogen measurement sensor of claim 6 , further comprising: a ceramic tube which is closed by being coupled to the oxygen ion conductor or the hydrogen ion conductor at a lower end thereof and opened at an upper end thereof.

8. The hydrogen measurement sensor of claim 1 , further comprising: a ceramic tube which is closed by being coupled to the oxygen ion conductor or the hydrogen ion conductor at a lower end thereof and opened at an upper end thereof.

Assignees

• Korea Advanced Inst Sci & Tech

Inventors

• Park Chong Ook
• Jung Byoung Hyo

Classifications

• G01N27/4074 Primary

  for detection of gases other than oxygen · CPC title

• G01N33/206

  Physics · mapped topic

• G01N27/4112 Primary

  Composition or fabrication of the solid electrolyte · CPC title

• G01N27/4114

  for detection of gases other than oxygen · CPC title

• G01N33/205

  in liquid state, e.g. molten metals · CPC title