GB1467735A - Ceramic gas sensor - Google Patents

Ceramic gas sensor

Info

Publication number
GB1467735A
GB1467735A GB3755474A GB3755474A GB1467735A GB 1467735 A GB1467735 A GB 1467735A GB 3755474 A GB3755474 A GB 3755474A GB 3755474 A GB3755474 A GB 3755474A GB 1467735 A GB1467735 A GB 1467735A
Authority
GB
United Kingdom
Prior art keywords
heater
pellet
less
disc
powder
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
Application number
GB3755474A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ford Motor Co Ltd
Ford Motor Co
Original Assignee
Ford Motor Co Ltd
Ford Motor Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US393698A external-priority patent/US3886785A/en
Application filed by Ford Motor Co Ltd, Ford Motor Co filed Critical Ford Motor Co Ltd
Publication of GB1467735A publication Critical patent/GB1467735A/en
Expired legal-status Critical Current

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
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
    • F02D41/1455—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio with sensor resistivity varying with oxygen concentration

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Electrochemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)

Abstract

1467735 Detecting gases electrically FORD MOTOR CO Ltd 28 Aug 1974 [31 Aug 1973] 37554/74 Heading G1N A transition metal oxide semi-conductor gas sensor of the type described in Specification 1376769 and used to determine the air/fuel ratio of an I.C. engine is made so as to withstand the testing environment and yet maintain a sufficient sensitivity. Very pure, at least 99À5% Titania powder is calcined and ball milled so as to change the majority into the high temperature stable phase and produce a fine powder, the maximum dimension of each particle being less than 20Á and the particle size range being narrow, 90% of the powder being less than 10Á and 75% being less than 5Á. After ball milling with an organic binder solution to form a slurry the latter is cast in the form of a tape and two such tapes are laminated from which ceramic discs are punched. Platinum heater wires are then applied to one surface of a disc and a second disc placed on top to form a heater pellet. The spaced electrodes and a thermocouple are placed on a heater pellet and superposed by a further heater pellet or ceramic disc after which the assembly is sintered. The particle size and distribution is such that the completed assembly has a density of 72% to 85% of the theoretical density and the average open pore diameter is between 0À4Á to 0À7Á with a total open pore volume of 0À04 to 0À1 cc/gm. This leads to a sensor which has a satisfactory response time and does not crack or fracture in use.
GB3755474A 1973-08-31 1974-08-28 Ceramic gas sensor Expired GB1467735A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US393698A US3886785A (en) 1971-11-15 1973-08-31 Gas sensor and method of manufacture

Publications (1)

Publication Number Publication Date
GB1467735A true GB1467735A (en) 1977-03-23

Family

ID=23555860

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3755474A Expired GB1467735A (en) 1973-08-31 1974-08-28 Ceramic gas sensor

Country Status (4)

Country Link
JP (1) JPS5533547B2 (en)
AU (1) AU470710B2 (en)
CA (1) CA995482A (en)
GB (1) GB1467735A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2029583A (en) * 1978-08-18 1980-03-19 Matsushita Electric Ind Co Tld Resistive gas sensors
WO2008058553A1 (en) * 2006-11-14 2008-05-22 Pirelli & C. S.P.A. Gas sensor and gas-sensitive metal oxide powder
WO2008103867A1 (en) * 2007-02-23 2008-08-28 Honeywell International Inc. Gas sensor apparatus for automotive exhaust gas applications
US11002700B2 (en) 2017-11-21 2021-05-11 Honeywell International Inc. High temperature gas sensor

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52104995A (en) * 1976-03-01 1977-09-02 Yazaki Corp Preparation process for gas detecting elements
JPS5840693B2 (en) * 1976-07-20 1983-09-07 日本特殊陶業株式会社 Manufacturing method of exhaust gas air-fuel ratio sensor
JPS5345289A (en) * 1976-10-06 1978-04-22 Riken Keiki Kk Gas detector
JPS5424391U (en) * 1977-07-21 1979-02-17
EP0001511A1 (en) * 1977-10-05 1979-04-18 Ford Motor Company Limited Thermistor and method of fabrication
JPS5514878U (en) * 1978-07-13 1980-01-30

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5613261B2 (en) * 1971-11-15 1981-03-27

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2029583A (en) * 1978-08-18 1980-03-19 Matsushita Electric Ind Co Tld Resistive gas sensors
GB2029583B (en) * 1978-08-18 1983-05-25 Matsushita Electric Ind Co Tld Gas sensing device and method of manufacturing the same
WO2008058553A1 (en) * 2006-11-14 2008-05-22 Pirelli & C. S.P.A. Gas sensor and gas-sensitive metal oxide powder
WO2008103867A1 (en) * 2007-02-23 2008-08-28 Honeywell International Inc. Gas sensor apparatus for automotive exhaust gas applications
US8359902B2 (en) 2007-02-23 2013-01-29 Honeywell International Inc. Gas sensor apparatus for automotive exhaust gas applications
US11002700B2 (en) 2017-11-21 2021-05-11 Honeywell International Inc. High temperature gas sensor

Also Published As

Publication number Publication date
AU7273274A (en) 1976-03-25
JPS5533547B2 (en) 1980-09-01
AU470710B2 (en) 1976-03-25
JPS5056292A (en) 1975-05-16
CA995482A (en) 1976-08-24

Similar Documents

Publication Publication Date Title
US4283441A (en) Method of making an ion conductive gas sensor body with a cermet electrode thereon
US3886785A (en) Gas sensor and method of manufacture
GB1467735A (en) Ceramic gas sensor
GB1434033A (en) Thermistors method and equipment for forming a single cloud of radar reflecti
GB1480817A (en) Oxide ceramic resistor
US3044968A (en) Positive temperature coefficient thermistor materials
US4208786A (en) Titania thermistor and method of fabricating
US4162631A (en) Rare earth or yttrium, transition metal oxide thermistors
GB789084A (en) Ceramic ferroelectric bodies
US4231254A (en) Rare earth or yttrium, transition metal oxide thermistors
Parmelee et al. Some pyrochemical properties of pyrophyllite
JPH022534B2 (en)
GB1288009A (en)
US4206647A (en) Titania thermistor and method of fabricating
EP0001508B1 (en) Thermistor and method of fabricating
Gropyanov et al. Investigation of the oxidation kinetics of silicon carbide heaters
US4232441A (en) Method for preparing rare earth or yttrium, transition metal oxide thermistors
JPS6097601A (en) Oxide semiconductor porcelain for thermistor
JP2578806B2 (en) Oxide semiconductor for thermistor
JPS6222421B2 (en)
JPS58201057A (en) Sensing element of gas
JPS54121795A (en) Production of gas detecting element material
JP2621314B2 (en) Thermistor
JPS6346028B2 (en)
JPS632056B2 (en)

Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee