CN113686938B - An electrode assembly structure for a sensor for measuring low-concentration oxygen in molten steel - Google Patents
An electrode assembly structure for a sensor for measuring low-concentration oxygen in molten steel Download PDFInfo
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- CN113686938B CN113686938B CN202111023905.7A CN202111023905A CN113686938B CN 113686938 B CN113686938 B CN 113686938B CN 202111023905 A CN202111023905 A CN 202111023905A CN 113686938 B CN113686938 B CN 113686938B
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- solid electrolyte
- ceramic tube
- molten steel
- electrolyte ceramic
- electrode lead
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 31
- 239000010959 steel Substances 0.000 title claims abstract description 31
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 20
- 239000001301 oxygen Substances 0.000 title claims abstract description 20
- 239000000919 ceramic Substances 0.000 claims abstract description 41
- 239000007784 solid electrolyte Substances 0.000 claims abstract description 41
- 229910052751 metal Inorganic materials 0.000 claims abstract description 17
- 239000002184 metal Substances 0.000 claims abstract description 17
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 239000004568 cement Substances 0.000 claims abstract description 11
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 18
- 239000011248 coating agent Substances 0.000 claims description 11
- 238000000576 coating method Methods 0.000 claims description 11
- 238000005259 measurement Methods 0.000 claims description 11
- 229910052697 platinum Inorganic materials 0.000 claims description 6
- 229910000510 noble metal Inorganic materials 0.000 claims description 5
- 238000001514 detection method Methods 0.000 abstract description 4
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
- G01N27/4075—Composition or fabrication of the electrodes and coatings thereon, e.g. catalysts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
- G01N27/4075—Composition or fabrication of the electrodes and coatings thereon, e.g. catalysts
- G01N27/4076—Reference electrodes or reference mixtures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
- G01N27/4078—Means for sealing the sensor element in a housing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
- G01N27/409—Oxygen concentration cells
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/416—Systems
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Molecular Biology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Measuring Oxygen Concentration In Cells (AREA)
Abstract
本发明涉及一种用于钢液低浓度氧测定传感器的电极组装结构，包括固体电解质陶瓷管（1），其一端设有钢液接触面（11）、内部设有空腔（12），空腔（12）内设有氧化物参比电极（2），固体电解质陶瓷管（1）的另一端连有水泥密封层（3），氧化物参比电极（2）内设有一根参比电极引线（4），参比电极引线（4）的一端穿过水泥密封层（3）伸出氧化物参比电极（2）外；固体电解质陶瓷管（1）的钢液接触面（11）上设有金属电极膜（5），金属电极膜（5）与工作电极引线相连，工作电极引线设于固体电解质陶瓷管（1）外。本发明的优点是避免了钢液的热流动对传感器信号带来的干扰，提高了传感器的检测下限。
The present invention relates to an electrode assembly structure for a sensor for measuring low-concentration oxygen in molten steel, comprising a solid electrolyte ceramic tube (1), one end of which is provided with a molten steel contact surface (11), a cavity (12) is provided inside, an oxide reference electrode (2) is provided in the cavity (12), the other end of the solid electrolyte ceramic tube (1) is connected to a cement sealing layer (3), a reference electrode lead (4) is provided in the oxide reference electrode (2), one end of the reference electrode lead (4) passes through the cement sealing layer (3) and extends out of the oxide reference electrode (2); a metal electrode film (5) is provided on the molten steel contact surface (11) of the solid electrolyte ceramic tube (1), the metal electrode film (5) is connected to the working electrode lead, and the working electrode lead is provided outside the solid electrolyte ceramic tube (1). The present invention has the advantages of avoiding interference of the heat flow of molten steel on the sensor signal and improving the detection lower limit of the sensor.
Description
Technical Field
The invention relates to the technical field of oxygen measuring sensor electrodes, in particular to an electrode assembly structure for a molten steel low-concentration oxygen measuring sensor.
Background
The oxygen sensor based on zirconia solid electrolyte plays an important role in ferrous metallurgy, and at present, the sensor mainly adopts molten steel as a working electrode of the sensor in the use process, and because the molten steel is in a high-temperature flowing state in the measurement process, certain deviation can be brought to a measurement result, and particularly the measurement of low-concentration oxygen can be influenced.
Disclosure of Invention
The invention aims to solve the problems of measurement deviation and inaccurate low-concentration oxygen measurement result of the existing solid electrolyte oxygen measurement sensor, and provides an electrode assembly structure for a molten steel low-concentration oxygen measurement sensor, which avoids interference of heat flow of molten steel on sensor signals and improves the detection lower limit of the sensor.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
The electrode assembly structure for the molten steel low-concentration oxygen measurement sensor comprises a solid electrolyte ceramic tube, wherein one end of the solid electrolyte ceramic tube is provided with a molten steel contact surface, a cavity is arranged in the solid electrolyte ceramic tube, an oxide reference electrode is arranged in the cavity, the other end of the solid electrolyte ceramic tube is connected with a cement sealing layer, and the cement sealing layer is arranged opposite to the cavity and is used for sealing the oxide reference electrode in the cavity;
A reference electrode lead is arranged in the oxide reference electrode, and one end of the reference electrode lead penetrates through the cement sealing layer and extends out of the oxide reference electrode;
The molten steel contact surface of the solid electrolyte ceramic tube is provided with a metal electrode film, the metal electrode film is connected with a working electrode lead, and the working electrode lead is arranged outside the solid electrolyte ceramic tube and is used for outputting a sensor signal together with a working electrode and a reference electrode.
Further, the working electrode lead is an overcoated electrode lead or a coated electrode lead.
Further, one end of the external coating electrode lead is connected with the metal electrode film, and the other end is downward and is not contacted with the outer surface of the solid electrolyte ceramic tube.
Further, one end of the coated electrode lead is connected with the metal electrode film, and the coated electrode lead extends downwards along the outer wall of the solid electrolyte ceramic tube, and the other end of the coated electrode lead is flush with the end face of the solid electrolyte ceramic tube.
Further, the molten steel contact surface of the solid electrolyte ceramic tube is an outwards-protruding arched section, a protruding cylindrical section is arranged in the middle of the arched section, and the diameter of the cylindrical section is smaller than that of the solid electrolyte ceramic tube.
Further, the external coating electrode lead is a platinum wire.
Further, the coated electrode lead is a platinum film arranged on the surface of the solid electrolyte ceramic tube.
Further, the metal electrode film is a noble metal electrode.
According to the technical scheme, the noble metal electrode is coated on the outer surface of the ceramic tube, then the platinum wire or the platinum film is connected with the coated electrode, and the platinum wire or the platinum film is led out to serve as a working electrode of the sensor, so that a sensor signal can be output together with the reference electrode. The motor assembly structure of the invention largely avoids the interference of the heat flow of molten steel to the sensor signal, and improves the detection lower limit of the sensor and the accuracy of the low-concentration oxygen measurement result.
Drawings
Fig. 1 is an electrode assembly structure view of an assembled external coating type electrode lead according to the present invention;
Fig. 2 is an electrode assembly structure diagram of the assembly coating type electrode lead according to the present invention.
Detailed Description
Example 1
In order that the present invention may be more clearly understood, a further description of an electrode assembly structure for a molten steel low concentration oxygen measuring sensor according to the present invention will be given, and the specific embodiments described herein are only for explaining the present invention and are not limiting the present invention.
Referring to fig. 1 and 2, an electrode assembly structure for a molten steel low concentration oxygen measuring sensor comprises a solid electrolyte ceramic tube 1, wherein one end of the solid electrolyte ceramic tube 1 is provided with a molten steel contact surface 11, a cavity 12 is arranged in the solid electrolyte ceramic tube 1, an oxide reference electrode 2 is arranged in the cavity 12, the other end of the solid electrolyte ceramic tube 1 is connected with a cement sealing layer 3, and the cement sealing layer 3 is arranged opposite to the cavity 12, and is characterized in that:
A reference electrode lead 4 is arranged in the oxide reference electrode 2, and one end of the reference electrode lead 4 penetrates through the cement sealing layer 3 and extends out of the oxide reference electrode 2;
The molten steel contact surface 11 of the solid electrolyte ceramic tube 1 is provided with an outwards convex arched section 11a, the middle part of the arched section 11a is provided with a convex cylindrical section 11b, and the diameter of the cylindrical section 11b is smaller than that of the solid electrolyte ceramic tube 1;
The molten steel contact surface 11 is provided with a metal electrode film 5, the metal electrode film 5 is a noble metal electrode, the metal electrode film 5 is connected with a working electrode lead, and the working electrode lead is arranged outside the solid electrolyte ceramic tube 1 and is used for outputting a sensor signal together with a reference electrode;
The working electrode lead is an external coating type electrode lead 6 or a coating type electrode lead 7;
Referring to fig. 1, the external coating electrode lead 6 is a platinum wire, one end of which is connected with the metal electrode film 5, and the other end of which is downward and is not in contact with the outer surface of the solid electrolyte ceramic tube 1;
Referring to fig. 2, the coated electrode lead 7 is a platinum film provided on the surface of the solid electrolyte ceramic tube 1, one end of which is connected to the metal electrode film 5, and the coated electrode lead 7 extends downward along the outer wall of the solid electrolyte ceramic tube 1, and the other end of which is flush with the end surface of the solid electrolyte ceramic tube 1.
The electrode assembly structure of the invention proposes to coat a noble metal electrode outside a ceramic tube, then connect a platinum wire or a platinum film with the coated electrode, and lead out a working electrode as a sensor, namely, the electrode assembly structure can output a sensor signal together with a reference electrode.
The device of the invention greatly avoids the interference of the heat flow of molten steel to the sensor signal and improves the detection lower limit of the sensor.
In addition to the embodiments described above, other embodiments of the invention are possible. All technical schemes formed by equivalent substitution or equivalent transformation fall within the protection scope of the invention.
Claims (6)
1. The utility model provides an electrode package assembly for molten steel low concentration oxygen measurement sensor, includes solid electrolyte ceramic tube (1), and the one end of solid electrolyte ceramic tube (1) is equipped with molten steel contact surface (11), is equipped with cavity (12) in solid electrolyte ceramic tube (1), is equipped with oxide reference electrode (2) in cavity (12), and the other end of solid electrolyte ceramic tube (1) is even has cement sealing layer (3), and cement sealing layer (3) are just against cavity (12) setting, its characterized in that:
A reference electrode lead (4) is arranged in the oxide reference electrode (2), and one end of the reference electrode lead (4) penetrates through the cement sealing layer (3) and extends out of the oxide reference electrode (2);
A metal electrode film (5) is arranged on the molten steel contact surface (11) of the solid electrolyte ceramic tube (1), the metal electrode film (5) is connected with a working electrode lead, the working electrode lead is arranged outside the solid electrolyte ceramic tube (1), and the metal electrode film (5) is a noble metal electrode;
The molten steel contact surface (11) of the solid electrolyte ceramic tube (1) is an outwards-protruding arched section (11 a), a protruding cylindrical section (11 b) is arranged in the middle of the arched section (11 a), and the diameter of the cylindrical section (11 b) is smaller than that of the solid electrolyte ceramic tube (1).
2. The electrode assembly structure for a molten steel low concentration oxygen measuring sensor according to claim 1, wherein:
The working electrode lead is an external coating electrode lead (6) or a coating electrode lead (7).
3. The electrode assembly structure for a molten steel low concentration oxygen measuring sensor according to claim 2, wherein:
one end of the external coating type electrode lead (6) is connected with the metal electrode film (5), and the other end is downward and is not contacted with the outer surface of the solid electrolyte ceramic tube (1).
4. The electrode assembly structure for a molten steel low concentration oxygen measuring sensor according to claim 2, wherein:
one end of the coated electrode lead (7) is connected with the metal electrode film (5), and the coated electrode lead (7) extends downwards along the outer wall of the solid electrolyte ceramic tube (1), and the other end of the coated electrode lead is flush with the end face of the solid electrolyte ceramic tube (1).
5. The electrode assembly structure for a molten steel low concentration oxygen measuring sensor according to claim 2 or 3, characterized in that:
the external coating type electrode lead (6) is a platinum wire.
6. The electrode assembly structure for a molten steel low concentration oxygen measuring sensor according to claim 2 or 4, characterized in that:
The coated electrode lead (7) is a platinum film arranged on the surface of the solid electrolyte ceramic tube (1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111023905.7A CN113686938B (en) | 2021-09-02 | 2021-09-02 | An electrode assembly structure for a sensor for measuring low-concentration oxygen in molten steel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111023905.7A CN113686938B (en) | 2021-09-02 | 2021-09-02 | An electrode assembly structure for a sensor for measuring low-concentration oxygen in molten steel |
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| Publication Number | Publication Date |
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| CN113686938A CN113686938A (en) | 2021-11-23 |
| CN113686938B true CN113686938B (en) | 2025-02-28 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN215953448U (en) * | 2021-09-02 | 2022-03-04 | 戴德诺电子科技(无锡)有限公司 | Electrode assembling structure for molten steel low-concentration oxygen measuring sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9206367D0 (en) * | 1992-03-24 | 1992-05-06 | Pilkington Plc | Oxygen measuring probe |
| DE19500147A1 (en) * | 1995-01-04 | 1996-07-11 | Bosch Gmbh Robert | Electrochemical sensor |
| WO2002082068A1 (en) * | 2001-04-03 | 2002-10-17 | Tyk Corporation | Concentration cell type hydrogen sensor and method for preparing solid electrolyte capable of conducting proton |
| KR20050105217A (en) * | 2003-02-28 | 2005-11-03 | 미야가와 가세이 고교 가부시키가이샤 | Method of forming thin film layer on external surface of sensor and sensor manufactured therewith |
| DE102012002027B4 (en) * | 2012-02-03 | 2013-09-12 | Heraeus Electro-Nite International N.V. | Measuring device for determining the oxygen activity in metal or slag melts |
| CN103698376B (en) * | 2013-12-11 | 2016-08-10 | 武汉科技大学 | An electrolytic cell for measuring the decomposition voltage of iron oxides in molten slag |
| CN103884752B (en) * | 2014-04-17 | 2016-05-25 | 武汉科技大学 | For studying the electrolytic cell of the electroactive oxide electrochemical behavior of fused electrolyte |
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| CN215953448U (en) * | 2021-09-02 | 2022-03-04 | 戴德诺电子科技(无锡)有限公司 | Electrode assembling structure for molten steel low-concentration oxygen measuring sensor |
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