JPS5927256A - Oxygen sensor - Google Patents
Oxygen sensorInfo
- Publication number
- JPS5927256A JPS5927256A JP57137751A JP13775182A JPS5927256A JP S5927256 A JPS5927256 A JP S5927256A JP 57137751 A JP57137751 A JP 57137751A JP 13775182 A JP13775182 A JP 13775182A JP S5927256 A JPS5927256 A JP S5927256A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- solid electrolyte
- oxygen
- oxygen sensor
- inner diameter
- 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.)
- Pending
Links
Classifications
-
- 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
- G01N27/411—Cells and probes with solid electrolytes for investigating or analysing of liquid metals
- G01N27/4112—Composition or fabrication of the solid electrolyte
Abstract
Description
【発明の詳細な説明】
この発明は、ジルコニア固体電解質音用いて溶融金属中
の酸素量全測定する酸素センサーに関するもので、低酸
素域での応答性、感度の向上を目的としたものである。[Detailed Description of the Invention] This invention relates to an oxygen sensor that measures the total amount of oxygen in molten metal using zirconia solid electrolyte sound, and is aimed at improving responsiveness and sensitivity in a low oxygen range. .
従来、浴融金属、特に溶鋼中の溶存酸素量測定には、こ
の棟のジルコニア固体電解質音用いた酸素センサーが広
く使われ、製鋼処理の脱酸コントロールに重要な役割を
果しているが、おおむね！； ０１ｒｌｒｍ以上の含有
酸素量の溶鋼においてのみ、一応の安定した測定が０１
能であって、脱酸素度の高い鋼種、つまりｓｏｐ戸ｍ以
下の低酸素域となると、急激に応答性が悪化したり、−
’ Ｏｐｐｍ以下ともなると、全く測定値が得られ’／
ｊいという問題があるのが現状である。Conventionally, the oxygen sensor using the zirconia solid electrolyte sound in this building has been widely used to measure the amount of dissolved oxygen in bath molten metal, especially molten steel, and it plays an important role in controlling deoxidation in the steelmaking process. ; Only in molten steel with an oxygen content of 01rlrm or more, a somewhat stable measurement is possible.
If the steel type has a high degree of deoxidation, that is, if it is in the low oxygen range below SOP, the response will suddenly deteriorate or -
'If it is less than Oppm, no measurement value can be obtained'/
The current situation is that there is a problem of poor performance.
そこで本発明番らは、応答性の向−１・を主眼にして種
々検討した結果、ジルコニア固体電解質の一端閉管の形
状が極めて大きな要因全なしているという知見を得為に
至った。ここで応答性とは、固体電解質体を溶融金属中
に浸漬した後、起電力カーブが安定域に達する時間、所
謂応答時間によって評価されており、一般的に少なくと
も応答時間は７２秒以内で小さい程良いとされている。As a result of various studies focusing on the direction of responsiveness, the present inventors have come to the knowledge that the shape of the one-end closed tube of the zirconia solid electrolyte is an extremely important factor. Here, responsiveness is evaluated by the so-called response time, which is the time it takes for the electromotive force curve to reach a stable range after the solid electrolyte body is immersed in molten metal, and generally the response time is at least 72 seconds or less. It is said to be moderately good.
これはジルコニア固体電解質を納めている保護筒等の消
耗限界と一致しており、応答速度が長いと、それだけ持
ちこたえる保護筒などの品質向上の必要全余儀なくされ
、経済的でない理由による。This coincides with the wear limit of the protective tube that houses the zirconia solid electrolyte, and the longer the response speed, the more it becomes necessary to improve the quality of the protective tube that can last that long, which is why it is not economical.
この発明は、以下説明するような酸素センサーを提供し
て上記従来の諸問題を解消する目的に出たものである。The present invention has been made for the purpose of solving the above-mentioned conventional problems by providing an oxygen sensor as described below.
この発明は、ジルコニア固体電解質の一端閉管の内径を
Ｄｍｐｎ ＋肉厚ｋ ｄｐｎｒｎとした場合、Ｄ ＜３
ｐｙｒｍ＋θ／精、≦ｄ＜１ｍｍの条件を充たす形状と
したことを特徴とする酸素センサー全提供するにある。In this invention, when the inner diameter of the one-end closed tube of the zirconia solid electrolyte is Dmpn + wall thickness k dpnrn, D < 3
The present invention provides an oxygen sensor characterized by having a shape that satisfies the conditions of pyrm+θ/precision and ≦d<1 mm.
この発明全図面実施例について説明すると、／は一端閉
管のジルコニア電解質で、２はリード線、３は基準極で
ある。To explain the embodiments of this invention in all drawings, / is a zirconia electrolyte with one end closed, 2 is a lead wire, and 3 is a reference electrode.
しかしてこの発明では、上記ジルコニア電解質／の一端
閉管の内径Ｊ）ｋ ３ｍｍ以下に、そして同肉厚ｄをａ
／η１ｍ以」二で１ｍｍ以下としたものである。However, in this invention, the inner diameter J) of the zirconia electrolyte/one end closed tube is set to 3 mm or less, and the same wall thickness d is set to a.
/η 1 m or more” 2 and 1 mm or less.
即ちこの発明者らは、応答時間は基準極内か熱的に平衡
に達するまでの時間とも言えるので、基準極の量が少な
い程良く、かつまた肉厚も上記熱平衡に達し易くするに
は薄くする程良いという基一本釣な考え事実に着１」シ
、ジルフニア固体電解質一端閉管の内径り全小さくする
、即ち３ｍｍ以下にする構成及び同肉厚を薄くする、即
ち１ｍｍ以下にする、但し０７ｍｍ以下とすることは一
端閉管の製造加ニーＬ強度が得がたい問題があり、０７
ｍ７よりは以上とする構成７からなるこの発明の酸素セ
ンサー全確立したものである。In other words, the inventors believe that the response time can be said to be the time it takes for the inside of the reference electrode to reach thermal equilibrium, so the smaller the amount of the reference electrode, the better. Based on the basic idea that the more the better, the inner diameter of the Zilfnia solid electrolyte tube with one end closed is made completely smaller, that is, 3 mm or less, and the wall thickness is made thinner, that is, 1 mm or less. If it is less than 0.7 mm, there is a problem that it is difficult to obtain the strength of the manufacturing process of the tube with one end closed.
The oxygen sensor of the present invention consisting of the above structure 7 has been completely established.
従って、この発明の酸素センサーは、良好な応答性が得
られ、脱酸素度の高い鋼種、つまり５０ｐｐｍ以下の低
酸素域においても応答性か劣化することなく、安定した
測定が行えるものであり、かつまた応答時間が短いため
、ジルコニア固体電解質全納めている保護筒などの消耗
限界の向１−に寄与・できるものである。Therefore, the oxygen sensor of the present invention has good responsiveness and can perform stable measurements without degrading the responsiveness even in steel types with a high degree of deoxidation, that is, in the low oxygen range of 50 ppm or less. Moreover, since the response time is short, it can contribute to reducing the wear limit of protective tubes, etc. that contain the entire zirconia solid electrolyte.
次に実施例を挙け、この発明の効果を述べる。Next, examples will be given to describe the effects of this invention.
実施例
試験条件として酸素センサーの材質；９モル％のＪＩＯ
’ｉ添加したｚｒＯ２質、基準極； Ｏｒ Ｏｒ２０
３粉末の混合物、リード線ｉ Ｍ／ｌ線を使用した本発
明品と従来比較品との各数種について、溶融金属として
酸素濃度’ｌ Ｏｐｐｍの溶鋼全使用して応答時間につ
き、試験した結果、次の表／、の結果が得られた。それ
によると、従来比較品の場合、内径りが、２７□、肉厚
ｄが／、 Ｏｍｍ の試品を例の場合でも応答時間７３
秒であって７２秒以内の成果は得らず、之に対して本発
明品の場合、内径Ｄ ｆ ３ ｍｍ以下の２ｍｍ ｓそ
して肉厚ｄｋ １ｍｍ以下の０． Ｉｔｎｍ、θ乙ｎＴ
ｙｙ＋。Example test conditions Material of oxygen sensor: 9 mol% JIO
'i added zrO2 quality, reference electrode; Or Or20
The results of testing on the response time of several products of the present invention using a mixture of 3 powders and a lead wire and a conventional comparative product using all molten steel with an oxygen concentration of 100 ppm as the molten metal. The following table/results were obtained. According to this, in the case of a conventional comparative product, the response time is 73 even when using a sample with an inner diameter of 27□ and a wall thickness d of /, Omm.
However, in the case of the product of the present invention, the inner diameter D f is 2 mm s or less and the wall thickness dk is 0.2 mm or less than 1 mm. Itnm, θotnT
yy+.
０、２ｍよと漸次薄くすることによって応答時間は夫々
ＩＯ秒、９秒、５秒と激減した。即ちこの発明構成の酸
素センサーによれば、５０ ｐｐｎｒ以ドの低酸素域で
の応答性、感度か向上できるものである。By gradually decreasing the thickness to 0 and 2 m, the response time was drastically reduced to IO seconds, 9 seconds, and 5 seconds, respectively. That is, according to the oxygen sensor constructed according to the present invention, the response and sensitivity can be improved in the low oxygen range of 50 ppnr or more.
表 ／。table /.
図面はこの発明酸素センサーの実施例全示す要部拡大縦
断面図である。The drawing is an enlarged longitudinal cross-sectional view of essential parts showing an embodiment of the oxygen sensor of the present invention.
Claims (1)
ジルコニア固体電解質の内径をＤｍｍ 、肉厚ｔ” ｄ
ｍｍとしたとき Ｄ ＜ ３□７ ０、 ／ ｍｍ Ｓ ｄ テ１ｍｍ の条件全光たす形状としたことを特徴とする酸素センサ
ー。[Claims] An oxygen sensor for measuring the amount of oxygen in molten metal,
The inner diameter of the zirconia solid electrolyte is Dmm, and the wall thickness is t''d.
An oxygen sensor characterized in that it has a shape that satisfies the following conditions: D < 3□7 0, / mm S d te 1 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57137751A JPS5927256A (en) | 1982-08-06 | 1982-08-06 | Oxygen sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57137751A JPS5927256A (en) | 1982-08-06 | 1982-08-06 | Oxygen sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5927256A true JPS5927256A (en) | 1984-02-13 |
Family
ID=15205978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57137751A Pending JPS5927256A (en) | 1982-08-06 | 1982-08-06 | Oxygen sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5927256A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6144343A (en) * | 1984-08-08 | 1986-03-04 | Nisshin Steel Co Ltd | Oxygen probe |
| WO1993000308A1 (en) * | 1991-06-25 | 1993-01-07 | Allied-Signal Inc. | Injection molding of zirconia oxygen sensor thimbles by an aqueous process |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5499693A (en) * | 1977-12-24 | 1979-08-06 | Max Planck Gesellschaft | Immersion sonde |
-
1982
- 1982-08-06 JP JP57137751A patent/JPS5927256A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5499693A (en) * | 1977-12-24 | 1979-08-06 | Max Planck Gesellschaft | Immersion sonde |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6144343A (en) * | 1984-08-08 | 1986-03-04 | Nisshin Steel Co Ltd | Oxygen probe |
| WO1993000308A1 (en) * | 1991-06-25 | 1993-01-07 | Allied-Signal Inc. | Injection molding of zirconia oxygen sensor thimbles by an aqueous process |
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