JPH05164732A - Indium type reference electrode zirconia oxygen sensor - Google Patents
Indium type reference electrode zirconia oxygen sensorInfo
- Publication number
- JPH05164732A JPH05164732A JP3351361A JP35136191A JPH05164732A JP H05164732 A JPH05164732 A JP H05164732A JP 3351361 A JP3351361 A JP 3351361A JP 35136191 A JP35136191 A JP 35136191A JP H05164732 A JPH05164732 A JP H05164732A
- Authority
- JP
- Japan
- Prior art keywords
- reference electrode
- indium
- oxygen sensor
- oxygen
- oxide particles
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Landscapes
- Measuring Oxygen Concentration In Cells (AREA)
Abstract
Description
【産業上の利用分野】酸素イオン導電性固体電解質を利
用して溶融金属内の溶存酸素の化学ポテンシャルを連続
的に測定するための酸素センサーの参照電極に関する。TECHNICAL FIELD The present invention relates to a reference electrode of an oxygen sensor for continuously measuring the chemical potential of dissolved oxygen in a molten metal by using an oxygen ion conductive solid electrolyte.
【０００２】[0002]
【従来技術とその問題点】溶融金属または合金中の溶存
酸素のポテンシャルを測定するためのインジウムと酸化
インジウム粒子よりなる系である参照電極と、該系を容
れて溶融金属または合金に接触させられるイットリア安
定化ジルコニア酸素イオン導電性固体電解質の容器と、
参照電極と溶融金属または合金のそれぞれに接続される
Ｃ，Ｗ，Ｍｏ，Ｒｅ，Ｔａ，Ｉｒ，Ｏｓまたはステンレ
ス鋼から選ばれるリード線と、該リード間の電位差を起
電力によって測定する手段とによって構成された酸素セ
ンサーを用いて、溶融金属または合金中の溶存酸素の化
学ポテンシャルを直接的に測定する場合、起電力のばら
つきが小さいこと、また起電力の安定性の指標となるセ
ルの電気抵抗が小さいことが必要である。とくに最近溶
融亜鉛めっき工程で亜鉛浴に微量のＡｌを添加すること
が行われており、亜鉛浴中のＡｌの濃度を厳しく制御す
ることが必要とされる。上述のように酸素センサーによ
り浴中の溶存酸素を測定し、この溶存酸素と平衡するＡ
ｌ濃度を測定する酸素センサーを用いて酸素活量を測定
する場合、起電力の測定値にばらつきがあるとＡｌの濃
度を正確に測定できず亜鉛めっきの品質を保証できなく
なる。従って起電力のばらつきを小さくする手段が望ま
れる。2. Description of the Related Art A reference electrode, which is a system composed of indium and indium oxide particles, for measuring the potential of dissolved oxygen in a molten metal or alloy, and a system in which the reference electrode is placed in contact with the molten metal or alloy. A container of yttria-stabilized zirconia oxygen ion conductive solid electrolyte,
By a lead wire selected from C, W, Mo, Re, Ta, Ir, Os or stainless steel connected to the reference electrode and each of the molten metal or alloy, and means for measuring the potential difference between the leads by an electromotive force. When directly measuring the chemical potential of dissolved oxygen in the molten metal or alloy using the configured oxygen sensor, the variation in electromotive force is small, and the electrical resistance of the cell is an indicator of the stability of electromotive force. Needs to be small. Particularly, recently, a trace amount of Al is added to the zinc bath in the hot dip galvanizing process, and it is necessary to strictly control the concentration of Al in the zinc bath. As described above, the dissolved oxygen in the bath is measured by the oxygen sensor and equilibrated with this dissolved oxygen.
When measuring the oxygen activity using an oxygen sensor for measuring the l concentration, if the measured values of the electromotive force vary, the Al concentration cannot be accurately measured and the zinc plating quality cannot be guaranteed. Therefore, a means for reducing the variation in electromotive force is desired.
【０００３】[0003]
【問題解決の手段】上記酸素センサーにおける参照電極
物質を構成するインジウム酸化物粒子とインジウムとの
混合重量比を一定範囲に限定することにより、測定する
起電力のばらつきを小さく、起電力の安定性の指標とな
るセルの電気抵抗も小さくできることを知見した。この
知見により起電力のばらつきの小さい酸素センサー標準
電極を提供するものである。SOLUTION: By limiting the mixing weight ratio of indium oxide particles and indium which constitute the reference electrode material in the above oxygen sensor to a certain range, variations in measured electromotive force are reduced and stability of electromotive force is reduced. It was found that the electric resistance of the cell, which is an index of, can be reduced. Based on this finding, an oxygen sensor standard electrode with a small variation in electromotive force is provided.
【０００４】[0004]
【発明の構成】本発明によれば、３５０〜５５０℃の溶
融金属中の溶存酸素の化学ポテンシャルを測定するため
の、イットリア安定化ジルコニア固体電解質の容器と、
インジウムとそのなかに分散した酸化インジウム粒子か
らなる参照電極と、電圧計と、該参照電極と該電圧計を
結ぶリード線と、該電圧計と溶融金属とを結ぶリード線
からなるジルコニア酸素センサーにおいて、インジウム
と酸化インジウム粒子から参照電極系の酸化インジウム
粒子対インジウムの混合重量比が０．０１〜０．５の範
囲にあることを特徴とする酸素センサーが提供される。According to the present invention, a container of yttria-stabilized zirconia solid electrolyte for measuring the chemical potential of dissolved oxygen in molten metal at 350 to 550 ° C.,
In a zirconia oxygen sensor comprising a reference electrode made of indium and indium oxide particles dispersed therein, a voltmeter, a lead wire connecting the reference electrode and the voltmeter, and a lead wire connecting the voltmeter and the molten metal. An oxygen sensor is provided, wherein the mixing weight ratio of indium oxide particles to indium oxide particles of the reference electrode system is in the range of 0.01 to 0.5.
【０００５】[0005]
【発明の具体的開示】本発明に係る酸素センサー参照電
極について具体的に説明する。DETAILED DESCRIPTION OF THE INVENTION The oxygen sensor reference electrode according to the present invention will be specifically described.
【０００６】[0006]
【実施例】図１に示すような固体電解質容器１、参照電
極２、リード線３，４、ポテンシオメーター６からなる
ジルコニア酸素センサーを亜鉛浴５に浸漬し、酸素セン
サーによりＡｌを含むＺｎ浴中の溶存酸素による起電力
を測定した。固体電解質容器１は５〜１０ｍｏｌ％のＹ
2Ｏ3を安定化剤としたジルコニア固体電解質よりなり、
参照電極はＩｎ2Ｏ3を用いたＩｎ−Ｉｎ2Ｏ3の系が用い
られ、リード線にはタングステンが用いられた。このよ
うに測定された酸化インジウム粒子対インジウムの混合
重量比と起電力のばらつきσ（ｍＶ）との関係を図２に
示す。図２よりインジウム酸化物粒子とインジウムの混
合重量比が０．０１を以上、０．０５Ｉ以下である場
合、起電力のばらつきσ（ｍＶ）が小さく安定すること
がわかった。また酸素センサーに電流を通すことによる
セルの電気抵抗は起電力の安定性の指標となるもので同
様に測定されたセルの電気抵抗と混合重量比の関係を図
３に示す。起電力のばらつきと同様酸化インジウム粒子
とインジウムの混合重量比が０．０１〜０．５の範囲に
ある場合電気抵抗も比較的小さい値を示し、起電力が安
定することを示した。EXAMPLE A zirconia oxygen sensor consisting of a solid electrolyte container 1, a reference electrode 2, lead wires 3, 4 and a potentiometer 6 as shown in FIG. 1 was immersed in a zinc bath 5 and a Zn bath containing Al by the oxygen sensor. The electromotive force due to the dissolved oxygen in the solution was measured. The solid electrolyte container 1 contains Y of 5 to 10 mol%.
Consisting of a zirconia solid electrolyte with 2 O 3 as a stabilizer,
The reference electrode system of an In-In 2 O 3 with In 2 O 3 is used, tungsten was used in the lead. FIG. 2 shows the relationship between the mixture weight ratio of indium oxide particles and indium measured as described above and the variation σ (mV) of electromotive force. From FIG. 2, it was found that when the mixture weight ratio of indium oxide particles and indium is 0.01 or more and 0.05 I or less, the variation σ (mV) of electromotive force is small and stable. The electric resistance of the cell when an electric current is passed through the oxygen sensor is an index of the stability of the electromotive force, and the relationship between the similarly measured electric resistance of the cell and the mixing weight ratio is shown in FIG. Similar to the variation of electromotive force, when the mixing weight ratio of indium oxide particles and indium was in the range of 0.01 to 0.5, the electric resistance also showed a relatively small value, indicating that the electromotive force was stable.
【０００７】[0007]
【図１】酸素センサーの使用態様を示す模式図。FIG. 1 is a schematic view showing a usage mode of an oxygen sensor.
【図２】参照電極物質を構成すインジウム酸化物粒子と
インジウムの混合重量比と酸素センサーの起電力のばら
つきとの関係を示す図。FIG. 2 is a diagram showing a relationship between a mixing weight ratio of indium oxide particles and indium forming a reference electrode substance and variations in electromotive force of an oxygen sensor.
【図３】参照電極物質を構成するインジウム酸化物粒子
とインジウムの混合重量比と酸素センサーセルの電気抵
抗との関係を示す図である。FIG. 3 is a diagram showing the relationship between the mixing weight ratio of indium oxide particles and indium forming the reference electrode material and the electrical resistance of the oxygen sensor cell.
１…固体電解質容器、 ２…標準極、 ３，４…リード線、 ５…溶融金属、 ６…ポテンシオメーター 1 ... Solid electrolyte container, 2 ... Standard electrode, 3, 4 ... Lead wire, 5 ... Molten metal, 6 ... Potentiometer
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中本 一成 兵庫県尼崎市鶴町１番地 日新製鋼株式会 社加工技術研究所内 (72)発明者 片山 巖 大阪府高槻市日吉台１丁目10番56号 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Issei Nakamoto 1 Tsurumachi, Amagasaki City, Hyogo Pref., Institute of Processing Technology, Nisshin Steel Co., Ltd. (72) Iwao Katayama 1-10 Hiyoshidai, Takatsuki City, Osaka Prefecture No. 56
Claims (1)
素の化学ポテンシャルを測定するための、イットリア安
定化ジルコニア固体電解質の容器と、インジウムとその
なかに分散した酸化インジウム粒子からなる参照電極
と、電圧計と、該参照電極と該電圧計を結ぶリード線
と、該電圧計と溶融金属とを結ぶリード線からなるジル
コニア酸素センサーにおいて、インジウムと酸化インジ
ウム粒子からなる参照電極系の酸化インジウム粒子対イ
ンジウムの混合重量比が０．０１〜０．５の範囲にある
ことを特徴とするジルコニア酸素センサー。 【０００１】1. A container of yttria-stabilized zirconia solid electrolyte for measuring a chemical potential of dissolved oxygen in a molten metal at 350 to 550 ° C., and a reference electrode made of indium and indium oxide particles dispersed therein. In a zirconia oxygen sensor comprising a voltmeter, a lead wire connecting the reference electrode and the voltmeter, and a lead wire connecting the voltmeter and the molten metal, indium oxide particles of a reference electrode system composed of indium and indium oxide particles. A zirconia oxygen sensor, wherein the mixed weight ratio of indium to indium is in the range of 0.01 to 0.5. [0001]
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3351361A JPH05164732A (en) | 1991-12-13 | 1991-12-13 | Indium type reference electrode zirconia oxygen sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3351361A JPH05164732A (en) | 1991-12-13 | 1991-12-13 | Indium type reference electrode zirconia oxygen sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05164732A true JPH05164732A (en) | 1993-06-29 |
Family
ID=18416778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3351361A Withdrawn JPH05164732A (en) | 1991-12-13 | 1991-12-13 | Indium type reference electrode zirconia oxygen sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05164732A (en) |
-
1991
- 1991-12-13 JP JP3351361A patent/JPH05164732A/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19990311 |