JPH0157734B2 - - Google Patents
Info
- Publication number
- JPH0157734B2 JPH0157734B2 JP57050199A JP5019982A JPH0157734B2 JP H0157734 B2 JPH0157734 B2 JP H0157734B2 JP 57050199 A JP57050199 A JP 57050199A JP 5019982 A JP5019982 A JP 5019982A JP H0157734 B2 JPH0157734 B2 JP H0157734B2
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- lead wire
- contact
- split pin
- substrate
- 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.)
- Expired
Links
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 38
- 239000001301 oxygen Substances 0.000 claims description 17
- 229910052760 oxygen Inorganic materials 0.000 claims description 17
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 15
- 239000000758 substrate Substances 0.000 claims description 12
- 239000000853 adhesive Substances 0.000 claims description 10
- 230000001070 adhesive effect Effects 0.000 claims description 10
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 12
- 239000002585 base Substances 0.000 description 10
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 10
- 229910052697 platinum Inorganic materials 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 3
- 229910000510 noble metal Inorganic materials 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910015902 Bi 2 O 3 Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910052910 alkali metal silicate Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010416 ion conductor Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910001120 nichrome Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- -1 oxygen ions Chemical class 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
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
- G01N27/407—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
Landscapes
- 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)
Description
【発明の詳細な説明】
〔発明の技術的分野〕
この発明は、酸素センサに関し、特にリード線
と電極との接触部において信頼性の高い電気的接
続をもつ酸素センサに関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an oxygen sensor, and more particularly to an oxygen sensor having a highly reliable electrical connection at the contact portion between a lead wire and an electrode.
従来酸素センサとして、一端封じの円筒状ジル
コニア系セラミツクスを用いたセンサ、板状のジ
ルコニアを用いたセンサ等が知られている。これ
ら酸素センサは、自動車の空燃比制御、燃焼器が
おかれた雰囲気の酸欠状態の検知等に用いられ
る。
Conventional oxygen sensors include sensors using cylindrical zirconia-based ceramics with one end sealed, sensors using plate-like zirconia, and the like. These oxygen sensors are used for controlling the air-fuel ratio of automobiles, detecting oxygen-deficient conditions in the atmosphere in which a combustor is placed, and the like.
板状センサは、例えばY2O2等で安定化された
ZrO2セラミツク基板の被測定側の表面に第１の
電極が設けられ、基準ガス側の表面に第２の電極
が設けられ、それぞれの電極からリード線が取り
出されている構造をとる。 Plate sensors are stabilized with e.g. Y 2 O 2
A first electrode is provided on the surface of the ZrO 2 ceramic substrate to be measured, a second electrode is provided on the surface of the reference gas side, and lead wires are taken out from each electrode.
このリード線の取り出し部においては、例えば
特開昭52−55591に示されているように、板バネ
を電極に圧接する構造のものがある。 As shown in Japanese Unexamined Patent Application Publication No. 52-55591, there is a structure in which a plate spring is pressed into contact with the electrode at the lead wire extraction portion.
しかし、この板バネを用いた機械的接触による
リード線と電極との接触部の構造は、高温下での
使用により板バネのバネ性が弱くなり、電極との
電気的接触が不良となる欠点がある。また酸素セ
ンサのヒートサイクル等による伸縮で、接触部が
離れてしまうという欠点もあり、さらに板バネの
電極との接触部の酸化により接触不良となる欠点
もある。 However, the structure of the contact part between the lead wire and the electrode through mechanical contact using a leaf spring has the drawback that the springiness of the leaf spring weakens when used under high temperatures, resulting in poor electrical contact with the electrode. There is. Further, there is a drawback that the contact portions are separated due to expansion and contraction due to heat cycles of the oxygen sensor, and there is also a drawback that poor contact occurs due to oxidation of the contact portions of the plate spring with the electrodes.
この発明は以上の点を考慮してなされたもの
で、リード線と電極との接触部において信頼性の
高い電気的接続をもち、リード線と電極の接続を
するときの作業性が向上した構造をもつ酸素セン
サを提供するものである。
This invention was made in consideration of the above points, and has a structure that has a highly reliable electrical connection at the contact portion between the lead wire and the electrode, and improves workability when connecting the lead wire and the electrode. The present invention provides an oxygen sensor having the following features.
すなわちこの発明は、酸素イオン導電性の例え
ばイツトリアで安定化されたジルコニアからなる
基体に電極が設けられ、この電極に対応した基体
に設けられた孔に割ピン状のリード線が通されこ
の電極に接触するように基体に固定され、このリ
ード線と電極との接触部に白金ペースト等の導電
性ペーストが設けられ、さらにこの上から接触部
を覆うように無機接着剤が設けられた、リード線
と電極の接触部における信頼性の高い電気的接続
をもつ酸素センサを得るものである。
That is, in this invention, an electrode is provided on a base made of zirconia stabilized with oxygen ions, for example, ittria, and a split pin-shaped lead wire is passed through a hole provided in the base corresponding to the electrode. A conductive paste such as platinum paste is provided at the contact portion between the lead wire and the electrode, and an inorganic adhesive is further provided to cover the contact portion from above. The present invention provides an oxygen sensor with highly reliable electrical connection at the line-to-electrode interface.
つまり本発明においては電極に対応した孔に割
ピンを固定するように割ピン状のリード線をいつ
たん固定することにより、ある程度の機械的強度
をもたせる。このため導電性ペーストが塗布しや
すくなり作業性が向上する。また導電性ペースト
を設けることにより良好な電気的接触が得られ、
さらに無機接着剤を設けることにより機械的強度
が得られ、リード線と電極との接触部において信
頼性の高い電気的接触をもつ酸素センサを得るこ
とができる。 That is, in the present invention, a certain degree of mechanical strength is provided by fixing the split pin-shaped lead wire in a manner such that the split pin is fixed in the hole corresponding to the electrode. This makes it easier to apply the conductive paste and improves workability. In addition, good electrical contact can be obtained by providing a conductive paste,
Further, by providing an inorganic adhesive, mechanical strength can be obtained, and an oxygen sensor having highly reliable electrical contact at the contact portion between the lead wire and the electrode can be obtained.
この発明による酸素センサの実施例を、図を参
照して説明する。
Embodiments of the oxygen sensor according to the present invention will be described with reference to the drawings.
第１図ａ，ｂは、リード線を取りだす前の基体
の被測定側及び基準側の平面図である。
Y2O38mol％添加されたジルコニアよりなる基体
１の被測定側表面には第１の電極２が、基準側表
面には第２の電極３が設けられている。この電極
２，３には、多孔質の白金が用いられている。第
１の電極２は、信号検知部２―１、引出し部２―
２及びリード線接続部２―３を有している。この
リード線接続部２―３には割ピン状のリード線を
固定するための孔４が基体１を貫通するように設
けられている。また第２の電極３も同様に信号検
知部３―１、引出し部３―２及びリード線接続部
３―３よりなり、このリード線接続部３―３には
割ピン状のリード線を固定するための孔５が基体
１を貫通するように設けられる。 FIGS. 1a and 1b are plan views of the measured side and the reference side of the base before the lead wires are taken out.
A substrate 1 made of zirconia doped with 8 mol % of Y 2 O 3 is provided with a first electrode 2 on the surface to be measured and a second electrode 3 on the surface on the reference side. The electrodes 2 and 3 are made of porous platinum. The first electrode 2 includes a signal detection section 2-1 and a lead-out section 2-1.
2 and a lead wire connection portion 2-3. A hole 4 for fixing a split pin-shaped lead wire is provided in the lead wire connecting portion 2-3 so as to pass through the base body 1. Similarly, the second electrode 3 consists of a signal detection section 3-1, a drawer section 3-2, and a lead wire connection section 3-3, and a split pin-shaped lead wire is fixed to this lead wire connection section 3-3. A hole 5 is provided to pass through the base body 1.
第２図ａは第１図ａ中Ａ―A′にて切断した場
合の断面図である。割ピン状のリード線６を基体
１の孔４に通し、割ピンを固定するときのごとく
白金よりなる割ピン状のリード線６を広げて、第
１の電極２と接触するように基板１に固定し、動
かない程度の機械的強度を得る。この状態を第２
図ｂに示す。 FIG. 2a is a sectional view taken along line AA' in FIG. 1a. Pass the split pin-shaped lead wire 6 through the hole 4 of the base 1, spread the split pin-shaped lead wire 6 made of platinum as when fixing a split pin, and insert the split pin-shaped lead wire 6 into the substrate 1 so that it comes into contact with the first electrode 2. to obtain mechanical strength to the extent that it does not move. This state is the second
Shown in Figure b.
次に第２図ｃに示すようにこの割ピン状のリー
ド線６と第１の電極２との接触部に白金ペースト
等の導電性ペースト７を塗布する。さらにこの接
触部を覆うように、例えば主成分がアルミナでバ
インダーとしてリン酸アルミニウムからなる無機
接着剤８を塗布し、800℃にて2Hr焼成すること
により割ピン状のリード線６と第１の電極２との
電気的接触を得、割ピン状のリード線６が基体１
に固定される。また第２の電極３からも同様にし
て、リード線をとりだす。 Next, as shown in FIG. 2c, a conductive paste 7 such as platinum paste is applied to the contact portion between the split pin-shaped lead wire 6 and the first electrode 2. Furthermore, an inorganic adhesive 8 made of alumina as a main component and aluminum phosphate as a binder is applied to cover this contact portion, and baked at 800°C for 2 hours to connect the split pin-shaped lead wire 6 and the first Electrical contact is made with the electrode 2, and the split pin-shaped lead wire 6 is connected to the base 1.
Fixed. Further, a lead wire is taken out from the second electrode 3 in the same manner.
第２図において、割ピン状のリード線６は、ル
ープ状の部分で第１の電極２と接触しているが、
第３図に示すごとく割ピン状のリード線６の広げ
た部分で第１の電極２と接触してもよい。 In FIG. 2, the split pin-shaped lead wire 6 is in contact with the first electrode 2 at the loop-shaped portion.
As shown in FIG. 3, the expanded portion of the split pin-shaped lead wire 6 may be in contact with the first electrode 2.
例えば、第１の電極においては、第２図ｃに示
すように、割ピン状のリード線のループ状の部分
において、この第１の電極と割ピン状のリード線
との接触をとり、第２の電極においては、第３図
に示すように、割ピン状のリード線の広げた部分
において、この第２の電極と割ピン状のリード線
との接触をとる。このような構造にすれば、割ピ
ン状のリード線を、基体に対して同じ方向から孔
に通すことができるので作業性が良くなる。 For example, in the first electrode, as shown in FIG. In the second electrode, as shown in FIG. 3, the second electrode and the cotter-pin-shaped lead wire are brought into contact at the widened portion of the cotter-pin-shaped lead wire. With this structure, the cotter pin-shaped lead wires can be passed through the holes from the same direction relative to the base, improving workability.
第２図に示すような構成をもつ酸素センサにお
いては、リード線６と第１の電極２との接触部に
おける接触抵抗は１Ω以下であり、電気的に良好
な接触が得られた。また800℃の加熱実験、０℃
〜800℃のヒートサイクル１万回のヒートサイク
ル実験においても、リード線６のはがれ、接触不
良等の発生はなかつた。 In the oxygen sensor having the configuration shown in FIG. 2, the contact resistance at the contact portion between the lead wire 6 and the first electrode 2 was 1Ω or less, and good electrical contact was obtained. Also, 800℃ heating experiment, 0℃
Even in a heat cycle experiment of 10,000 heat cycles at ~800°C, there was no occurrence of peeling of the lead wire 6 or poor contact.
以上のような構成にすると、まず割ピン状のリ
ード線６を孔４に通し基板１に固定することによ
り、割ピン状のリード線６の第１の電極２との接
触部において動かない程度の機械的強度を得るこ
とができる。また導電性ペースト７により、割ピ
ン状のリード線６と第１の電極２との電気的良好
な接触を得る。導電性ペースト７を用いるので、
前述のような板バネ等の機械的接触に比べ、信頼
性が向上する。また導電性ペースト７を塗布する
とき、割ピン状のリード線６が孔４にいつたん動
かない程度に固定されているので、導電性ペース
ト７を塗布しやすく作業性が向上する。さらに無
機接着剤８にて固定することにより振動等の衝撃
に対して強固な接触部となる。さらにこの無機接
着剤８により、この接触部を保護することもでき
る。 With the above configuration, by first passing the split pin-shaped lead wire 6 through the hole 4 and fixing it to the substrate 1, the split pin-shaped lead wire 6 can be fixed to the extent that it does not move at the contact portion with the first electrode 2. mechanical strength can be obtained. Further, the conductive paste 7 provides good electrical contact between the split pin-shaped lead wire 6 and the first electrode 2. Since conductive paste 7 is used,
Reliability is improved compared to mechanical contact such as a leaf spring as described above. Further, when applying the conductive paste 7, the split pin-shaped lead wire 6 is fixed in the hole 4 to such an extent that it does not move, so that the conductive paste 7 can be easily applied and work efficiency is improved. Furthermore, by fixing with an inorganic adhesive 8, the contact portion becomes strong against shocks such as vibrations. Furthermore, this inorganic adhesive 8 can also protect this contact portion.
以上の実施例においては、基体としてY2O3で
安定化したジルコニアを用いたが、すでに知られ
ている他の酸素イオン導電体、例えば主成分とし
てHfO2，CeO2，ThO2，ZrO2，Bi2O3のうち一
成分からなりこれらに種々の添加物を加えたセラ
ミツク等を用いてもよい。また電極材として、白
金以外の種々の貴金属及びこれらの合金や、耐熱
性電子導電性セラミツクとして例えばRaCoO3等
のペロブスカイト型化合物等を用いてもよい。さ
らに、リード線として、種々の貴金属線やニツケ
ル線、ニクロム線等の耐熱性金属線等を用いても
よし、導電性ペーストとして、種々の貴金属ペー
ストや電子伝導性酸化物ペースト等を用いてもよ
い。無機接着剤としても、主成分がジルコニア、
シリカ、マグネシア等でバインダーがケイ酸アル
カリ、ホウ酸系ガラス等の組合せからなるもの等
を用いてもよい。 In the above examples, zirconia stabilized with Y 2 O 3 was used as the substrate, but other oxygen ion conductors that are already known, such as HfO 2 , CeO 2 , ThO 2 , ZrO 2 as the main component, may be used. , Bi 2 O 3 and various additives may be used. Further, as the electrode material, various noble metals other than platinum and alloys thereof, and heat-resistant electronically conductive ceramics such as perovskite compounds such as RaCoO 3 may be used. Furthermore, various noble metal wires, heat-resistant metal wires such as nickel wires, nichrome wires, etc. may be used as lead wires, and various noble metal pastes, electronic conductive oxide pastes, etc. may be used as conductive pastes. good. Also used as an inorganic adhesive, the main component is zirconia,
Silica, magnesia, etc. may be used as a binder in combination with alkali silicate, boric acid glass, etc.
この発明によれば、割ピン状のリード線を基体
の孔を通して、基体に固定することにより、割ピ
ン状のリード線と電極の接触部において動かない
程度の機械的強度が得られ導電性ペーストを塗布
しやすく、また導電性ペーストにより、良好な電
気的接触が得られ、さらに無機接着剤による固定
で機械的に強固な接続となり、リード線と電極と
の接続部において信頼性の高い電気的接触をもつ
酸素センサを得ることができる。
According to this invention, by fixing the split pin-shaped lead wire to the base through the hole in the base, mechanical strength to the extent that it does not move can be obtained at the contact portion between the split pin-shaped lead wire and the electrode, and the conductive paste It is easy to apply, and the conductive paste provides good electrical contact, and the inorganic adhesive provides a mechanically strong connection, providing highly reliable electrical contact at the connection between the lead wire and the electrode. An oxygen sensor with contact can be obtained.
第１図乃至第３図はこの発明に係る酸素センサ
を説明するための図であり、第１図ａは被測定側
表面からみた基板の平面図、第１図ｂは基準側表
面からみた基板の平面図、第２図ａは第１図ａ中
Ａ―A′にて切断した場合の断面図、第２図ｂは
割ピン状のリード線を固定した状態を表わす断面
図、第２図ｃは、導電性ペースト及び無機接着剤
を設けた状態を表わす断面図であり、第３図は割
ピン状のリード線の他の固定状態を表わす断面図
である。
１…基板、２…電極、３…電極、４…孔、５…
孔、６…リード線、７…導電性ペースト、８…無
機接着剤。
1 to 3 are diagrams for explaining the oxygen sensor according to the present invention, in which FIG. 1a is a plan view of the substrate as seen from the surface to be measured, and FIG. 1b is a plan view of the substrate as seen from the surface on the reference side. FIG. 2a is a cross-sectional view taken along line A-A' in FIG. 1a, FIG. 3c is a cross-sectional view showing a state in which a conductive paste and an inorganic adhesive are provided, and FIG. 3 is a cross-sectional view showing another state in which the split pin-shaped lead wire is fixed. 1... Substrate, 2... Electrode, 3... Electrode, 4... Hole, 5...
Hole, 6... Lead wire, 7... Conductive paste, 8... Inorganic adhesive.
Claims (1)
られた電極と、前記電極に対応して前記基板に設
けられた孔と、前記孔に通されて前記電極と接触
するように前記基板に固定された割ピン状のリー
ド線と、このリード線と前記電極との接触部に設
けられた導電性ペーストと、前記接触部を覆うよ
うに設けられた無機接着剤とを具備してなること
を特徴とする酸素センサ。1. An oxygen ion conductive substrate, an electrode provided on the substrate, a hole provided in the substrate corresponding to the electrode, and fixed to the substrate so as to be passed through the hole and in contact with the electrode. A conductive paste is provided at a contact portion between the lead wire and the electrode, and an inorganic adhesive is provided to cover the contact portion. Characteristic oxygen sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57050199A JPS58167953A (en) | 1982-03-30 | 1982-03-30 | Oxygen sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57050199A JPS58167953A (en) | 1982-03-30 | 1982-03-30 | Oxygen sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58167953A JPS58167953A (en) | 1983-10-04 |
| JPH0157734B2 true JPH0157734B2 (en) | 1989-12-07 |
Family
ID=12852458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57050199A Granted JPS58167953A (en) | 1982-03-30 | 1982-03-30 | Oxygen sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58167953A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101500347B (en) * | 2009-03-03 | 2012-10-31 | 深圳市格普斯纳米电热科技有限公司 | Electricity connection method for electric heating film |
-
1982
- 1982-03-30 JP JP57050199A patent/JPS58167953A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58167953A (en) | 1983-10-04 |
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