JP2012137363A - ガスセンサ - Google Patents
ガスセンサ Download PDFInfo
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- JP2012137363A JP2012137363A JP2010289465A JP2010289465A JP2012137363A JP 2012137363 A JP2012137363 A JP 2012137363A JP 2010289465 A JP2010289465 A JP 2010289465A JP 2010289465 A JP2010289465 A JP 2010289465A JP 2012137363 A JP2012137363 A JP 2012137363A
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- 238000001514 detection method Methods 0.000 claims abstract description 84
- 238000009792 diffusion process Methods 0.000 claims abstract description 52
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims description 94
- 238000005259 measurement Methods 0.000 claims description 57
- 239000001301 oxygen Substances 0.000 claims description 52
- 229910052760 oxygen Inorganic materials 0.000 claims description 52
- 238000006722 reduction reaction Methods 0.000 claims description 50
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 46
- 239000007784 solid electrolyte Substances 0.000 claims description 45
- 239000011148 porous material Substances 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 9
- 239000003054 catalyst Substances 0.000 claims description 8
- 238000000354 decomposition reaction Methods 0.000 claims description 2
- 230000035945 sensitivity Effects 0.000 abstract description 16
- 101100460719 Mus musculus Noto gene Proteins 0.000 abstract 1
- 101100187345 Xenopus laevis noto gene Proteins 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 description 36
- 239000002184 metal Substances 0.000 description 36
- 230000001012 protector Effects 0.000 description 19
- 230000002093 peripheral effect Effects 0.000 description 10
- 239000010410 layer Substances 0.000 description 9
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 8
- 239000000919 ceramic Substances 0.000 description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical group [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 7
- 239000000454 talc Substances 0.000 description 7
- 229910052623 talc Inorganic materials 0.000 description 7
- 239000012212 insulator Substances 0.000 description 6
- -1 oxygen ions Chemical class 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 229910052697 platinum Inorganic materials 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 229910001260 Pt alloy Inorganic materials 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000002788 crimping Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 229910052703 rhodium Inorganic materials 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000011195 cermet Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- G01N27/416—Systems
- G01N27/417—Systems using cells, i.e. more than one cell and probes with solid electrolytes
- G01N27/419—Measuring voltages or currents with a combination of oxygen pumping cells and oxygen concentration cells
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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
【解決手段】
第1測定室101への排気ガスの流通を制限するため設けられた第1拡散抵抗部103よりも上流側に、排気ガスに含まれるNO2をNOに還元する還元部18を設けた。第1拡散抵抗部103をNOxが通過する場合において、NOよりも分子量の大きなNO2は、NOと比べての拡散の度合いが低い。還元部18によってNO2をNOに還元することで、第1拡散抵抗部103を通過する排気ガスにはNO2がほとんど含まれず、第1拡散抵抗部103におけるNOxの流通がNO2によって律速されることがないため、NOx検出の感度を向上することができる。
【選択図】図2
Description
18 還元部
101 第1測定室
102 第2測定室
103 第1拡散抵抗部
110 Ip1セル
111 固体電解質体
112 電極
113 電極
130 Ip2セル
131 固体電解質体
132 電極
133 電極
151 ヒータパターン
Claims (4)
- 検出対象ガスに含まれるNOxの濃度を検出するガスセンサであって、
前記検出対象ガスの流通を制限する拡散抵抗部を介して前記検出対象ガスが導入される第1測定室と、
前記拡散抵抗部よりも上流側に設けられ、前記第1測定室へ導入される前記検出対象ガスに含まれるNO2をNOに還元する還元部と、
第1固体電解質層および一対の第1電極を備え、前記一対の第1電極が前記第1測定室の内側と外側とに設けられる第1酸素ポンプセルと、
前記第1測定室よりも下流側に位置し、前記第1測定室から前記検出対象ガスが導入される第2測定室と、
第2固体電解質層および一対の第2電極を備え、前記一対の第2電極が前記第2測定室の内側と外側とに設けられた第2酸素ポンプセルであって、前記第2測定室に導入された前記検出対象ガスに含まれるNOの分解によって生じた酸素量に基づく電流が前記一対の第2電極間に流れる第2酸素ポンプセルと、
を備えることを特徴とするガスセンサ。 - 前記還元部を加熱するヒータをさらに備え、
前記ヒータの加熱によって、前記還元部は、前記還元部を流通する前記検出対象ガスを、NO2のNOへの還元に必要な温度である還元温度以上に加熱することを特徴とする請求項1に記載のガスセンサ。 - 前記還元部には、NO2のNOへの還元反応を触媒する還元触媒が担持されていることを特徴とする請求項1または2に記載のガスセンサ。
- 前記拡散抵抗部および前記還元部は、前記検出対象ガスを流通させる多数の連続する気孔が形成された多孔質体からなり、
前記還元部の気孔率は、前記拡散抵抗部の気孔率に比べて高いことを特徴とする請求項1から3のいずれかに記載のガスセンサ。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010289465A JP5192031B2 (ja) | 2010-12-27 | 2010-12-27 | ガスセンサ |
EP11194598.6A EP2469274B1 (en) | 2010-12-27 | 2011-12-20 | Gas sensor |
US13/336,454 US8826727B2 (en) | 2010-12-27 | 2011-12-23 | Gas sensor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010289465A JP5192031B2 (ja) | 2010-12-27 | 2010-12-27 | ガスセンサ |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2012137363A true JP2012137363A (ja) | 2012-07-19 |
JP5192031B2 JP5192031B2 (ja) | 2013-05-08 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2010289465A Active JP5192031B2 (ja) | 2010-12-27 | 2010-12-27 | ガスセンサ |
Country Status (3)
Country | Link |
---|---|
US (1) | US8826727B2 (ja) |
EP (1) | EP2469274B1 (ja) |
JP (1) | JP5192031B2 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015227790A (ja) * | 2014-05-30 | 2015-12-17 | 日本特殊陶業株式会社 | センサ |
JP2020173247A (ja) * | 2019-04-08 | 2020-10-22 | 日本特殊陶業株式会社 | NOxセンサ素子及びNOxセンサ |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9551684B2 (en) * | 2013-01-08 | 2017-01-24 | Ngk Spark Plug Co., Ltd. | Gas sensor element and gas sensor |
JP6194526B2 (ja) * | 2013-06-05 | 2017-09-13 | 高周波熱錬株式会社 | 板状ワークの加熱方法及び加熱装置並びにホットプレス成形方法 |
CN104677966A (zh) * | 2015-01-23 | 2015-06-03 | 电子科技大学 | 二氧化氮气体传感器及其制备和测试方法 |
US11549925B2 (en) * | 2019-04-08 | 2023-01-10 | Ngk Spark Plug Co., Ltd. | NOx sensor element and NOx sensor |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH102881A (ja) * | 1996-06-19 | 1998-01-06 | Ngk Insulators Ltd | NOxセンサ |
JPH1123523A (ja) * | 1997-06-30 | 1999-01-29 | Riken Corp | 窒素酸化物センサ |
JPH11201942A (ja) * | 1997-11-14 | 1999-07-30 | Riken Corp | 窒素酸化物センサ |
JPH11237366A (ja) * | 1997-11-27 | 1999-08-31 | Nippon Soken Inc | ガスセンサ |
JP2000321238A (ja) * | 1996-09-17 | 2000-11-24 | Riken Corp | ガスセンサ |
JP2001083117A (ja) * | 1999-09-17 | 2001-03-30 | Riken Corp | 窒素酸化物ガスセンサ |
JP2009039419A (ja) * | 2007-08-10 | 2009-02-26 | Tomy Co Ltd | 歩行玩具 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3623065B2 (ja) | 1996-02-23 | 2005-02-23 | 日本碍子株式会社 | 窒素酸化物センサ |
JPH09297119A (ja) | 1996-05-02 | 1997-11-18 | Riken Corp | 窒素酸化物検知装置 |
JP3544437B2 (ja) * | 1996-09-19 | 2004-07-21 | 日本碍子株式会社 | ガスセンサ |
US6695964B1 (en) * | 1996-12-02 | 2004-02-24 | Ngk Spark Plug Co., Ltd. | Method and apparatus for measuring NOx gas concentration |
JP3631899B2 (ja) | 1998-04-28 | 2005-03-23 | 三菱重工業株式会社 | 煙道排ガス中のNOx分析装置 |
KR20010049489A (ko) * | 1999-06-10 | 2001-06-15 | 오카무라 가네오 | 가연성 가스 농도측정장치 및 이것을 이용한 가연성 가스농도측정방법, 및 탄화수소가스 농도측정장치 및 이것을이용한 탄화수소가스 농도측정방법 |
EP1722219A1 (en) * | 2005-05-10 | 2006-11-15 | Sumitomo Electric Industries, Ltd. | Gas sensor |
EP1739416B1 (en) * | 2005-07-01 | 2010-09-01 | NGK Spark Plug Co., Ltd. | Plural-cell gas sensor with heater |
JP4845111B2 (ja) * | 2005-10-17 | 2011-12-28 | 日本特殊陶業株式会社 | ガスセンサ素子及びガスセンサ |
US8168053B2 (en) * | 2006-01-23 | 2012-05-01 | Denso Corporation | Gas sensing member used for gas sensor and method of manufacturing the member |
JP5344675B2 (ja) * | 2007-10-17 | 2013-11-20 | 日本特殊陶業株式会社 | ガスセンサ |
JP5053151B2 (ja) * | 2008-03-31 | 2012-10-17 | 日本碍子株式会社 | ガスセンサおよびNOxセンサ |
JP5204160B2 (ja) * | 2009-09-03 | 2013-06-05 | 日本特殊陶業株式会社 | マルチガスセンサの制御方法及びマルチガスセンサの制御装置 |
-
2010
- 2010-12-27 JP JP2010289465A patent/JP5192031B2/ja active Active
-
2011
- 2011-12-20 EP EP11194598.6A patent/EP2469274B1/en active Active
- 2011-12-23 US US13/336,454 patent/US8826727B2/en active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH102881A (ja) * | 1996-06-19 | 1998-01-06 | Ngk Insulators Ltd | NOxセンサ |
JP2000321238A (ja) * | 1996-09-17 | 2000-11-24 | Riken Corp | ガスセンサ |
JPH1123523A (ja) * | 1997-06-30 | 1999-01-29 | Riken Corp | 窒素酸化物センサ |
JPH11201942A (ja) * | 1997-11-14 | 1999-07-30 | Riken Corp | 窒素酸化物センサ |
JPH11237366A (ja) * | 1997-11-27 | 1999-08-31 | Nippon Soken Inc | ガスセンサ |
JP2001083117A (ja) * | 1999-09-17 | 2001-03-30 | Riken Corp | 窒素酸化物ガスセンサ |
JP2009039419A (ja) * | 2007-08-10 | 2009-02-26 | Tomy Co Ltd | 歩行玩具 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2015227790A (ja) * | 2014-05-30 | 2015-12-17 | 日本特殊陶業株式会社 | センサ |
JP2020173247A (ja) * | 2019-04-08 | 2020-10-22 | 日本特殊陶業株式会社 | NOxセンサ素子及びNOxセンサ |
JP7237866B2 (ja) | 2019-04-08 | 2023-03-13 | 日本特殊陶業株式会社 | NOxセンサ素子及びNOxセンサ |
Also Published As
Publication number | Publication date |
---|---|
US8826727B2 (en) | 2014-09-09 |
JP5192031B2 (ja) | 2013-05-08 |
US20120160012A1 (en) | 2012-06-28 |
EP2469274A1 (en) | 2012-06-27 |
EP2469274B1 (en) | 2018-08-29 |
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