CN1885016A - Monomer integrated type oxygen sensor for automotive air fuel ratio control and process for preparing the same - Google Patents
Monomer integrated type oxygen sensor for automotive air fuel ratio control and process for preparing the same Download PDFInfo
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- CN1885016A CN1885016A CN 200610043114 CN200610043114A CN1885016A CN 1885016 A CN1885016 A CN 1885016A CN 200610043114 CN200610043114 CN 200610043114 CN 200610043114 A CN200610043114 A CN 200610043114A CN 1885016 A CN1885016 A CN 1885016A
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Abstract
The invention relates to a monomer integrated vehicle oxygen sensor for controlling the air/fuel ratio, and relative preparing method, wherein the device comprises a cylinder hollow tube with one sealing end and hollow chamber, and a protruded ring integrated with the hollow tube; the inner and outer walls of hollow tube are arranged with signal wire holes between them; said ring has two electrode wiring holes along the outer wall of hollow tube; the sealing end is arranged with arc electrode, sensitive film, catalysis film and protective film, that connected to the signal wire; the side circumference of sealing end is printed with porous heating film; the side wall of hollow tube is also printed with heating electrode via electrode wiring hole connected to the porous heating film; the surface of base between the sealing end and the ring is coated with thermal-insulated protective film; the prepared sample has high heat transmission speed, anti-vibration property, the signal protection function, simple structure, long service life and high response speed.
Description
Technical field
The present invention relates to a kind of air/fuel than control lambda sensor and preparation method thereof, particularly a kind of monomer integrated type oxygen sensor for automotive air fuel ratio control and preparation method thereof.
Background technology
Thin, the thick film sheet type lambda sensor of existing metal oxide, as air/fuel than the ZrO that takes the lead in using on the conversion of control oxygen consuming amount and electric signal and the market
2Concentration difference type battery is compared, and has anti-saturnism, and response speed is fast, advantages of simple structure and simple.But it adopts chip multilayer typography or multi-disc combination overlaying structure, causes electric interelectrode conductance deterioration easily, causes switching signal to be subject to the ambiance influence, and the adaptive temperature pace of change is low; And heating power line exit is the deterioration along with the rising of temperature easily, thereby causes the entire device performance to descend.Add to have the anti-vibration ability, air seal is difficult, is difficult for assembling, and a series of problems such as cost an arm and a leg cause such device to be difficult to bring into play its advantage, and air/fuel is restricted than the further raising of controlling level.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned prior art, provide a kind of low cost, vibration resistance, it is little that switching signal is influenced by ambiance, adaptive temperature pace of change height, response speed is fast, monomer integrated type oxygen sensor for automotive air fuel ratio control easy for installation and preparation method thereof.
For achieving the above object, monomer integrated type oxygen sensor for automotive air fuel ratio control of the present invention comprises matrix, this matrix be one cylindric, end sealing and inner for the hollow tube of cavity structure and with hollow tube be the annulus of the projection of one, offer the signal wire hole between the inside and outside wall of hollow tube, on annulus, offer two electrode cable-through holes along the outer wall place of hollow tube; The hollow tube Closed End is provided with arc-shaped electrode, sensitive membrane, catalytic membrane and the diaphragm that is connected with signal wire; On the sidewall circumference of hollow tube blind end, be printed with the porous heating film, and on the sidewall of hollow tube, also be printed with the heating electrode that is connected with the porous heating film through the electrode cable-through hole; Matrix surface between closed end and annulus is coated with insulation protection film; The thickness of said hollow tube 1 blind end is 0.5-1.2mm, and the wall thickness of hollow tube is 0.5mm-1.5mm.
Preparation method of the present invention is: at first be that 90%～99% aluminium oxide ceramics powder is made slurry with mass percent, adopt slip casting method to make ceramic matrix with ceramic process; The granularity of press platinum slurry quality adding 0～10% in grand star C-7001 platinum slurry is less than 2 microns rutile TiO
2, regulate slurry with thinning agent and make its viscosity reach print request, stirred 10～20 minutes down at 55 ℃～65 ℃ then, be cooled to 15～25 ℃ as the heating film slurry; Make its surface reach seven grades of smoothnesss through the sub-micron uniform polish matrix, use ultrasonic cleaning, with thickness is that the corrosion resistant plate of 3mm is made printing stencil, the printing surface two ends width ratio of template is 1.1: 1.3, and the mould printing face is carried out the submillimeter level lines handle, during printing, at first the printing surface in this template floods the heating film slurry, the printing porous of on the sidewall circumference of hollow tube blind end, rolling again heating film, display levelling with 5～30 rev/mins rotating speed then, the rotational speed with 5～30 rev/mins is dried in 250 ℃～300 ℃ infrared drying oven again; With the signal wire hole of grand star C-7001 platinum slurry impregnation matrix, and printing platinum slurry forms arc-shaped electrode on the end face of matrix blind end, and the responsive slurry of printing forms sensitive membrane after the infrared oven dry, after the infrared oven dry 1200 ℃～1350 ℃ roasting 1-3 hour; To the sensitive membrane mass percent 4% PdCl
2Solution applies, and forms catalytic membrane in 1～4 hour 820 ℃～850 ℃ following roastings after the infrared oven dry; Use Detitanium-ore-type TiO again
2Slurry coating cylinder end face, the back 820 ℃ of following roastings of infrared oven dry formed diaphragm in 1～2 hour; Printing was through the heating electrode slurry of porous heating film electrode cable-through hole on the sidewall of matrix, formed porous heating film electrode after the infrared oven dry at 830 ℃ of following roasting 10-30 minutes; Again at the blind end of matrix to the surface applied insulation protection film slurry between the annulus, formed insulation protection film in 20 minutes 820 ℃ of following roastings after the infrared oven dry.
Thinning agent of the present invention is the ethyl cellulose aqueous solution, terpinol or polyvinyl alcohol water solution; Responsive slurry is the TiO that mixes Pt
2The responsive slurry of type, Pd crystal boundary diffusion TiO
2Responsive slurry of type or Ti
(1-0.075)Sn
(0.070)Nb
(0.005)Thick film ink; The heating electrode slurry is platinum silver paste, silver slurry or platinum slurry, gold paste; The thermal insulation protection membrane material is grand star I-4385 slurry.
The sensor that makes according to preparation method of the present invention has that heat transfer rate is fast, and anti-vibration can effectively be protected signal in the use, and is simple in structure, and the long-life, response speed is fast, and is cheap.Adopt the narrow resistance type metal-oxide semiconductor (MOS) of wide temperature thick film sensitive material, special heating film makes the sensor can be in 100 ℃～700 ℃ temperature range, and response speed and has the advantage of the circulation impact of anti-the fast temperature between (40～250 milliseconds).
Description of drawings
Fig. 1 is a basal body structure synoptic diagram of the present invention;
Fig. 2 is the structural representation of matrix Closed End of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
Referring to Fig. 1,2, oxygen sensor for automotive air fuel ratio control of the present invention comprises matrix, that this matrix comprises is one cylindric, end sealing and inner for the hollow tube 1 of cavity structure and with hollow tube 1 be the annulus 2 of the projection of one, the thickness of hollow tube 1 blind end is 0.5-1.2mm, and thickness of pipe is 0.5mm～1.5mm, offers signal wire hole 3 between the inside and outside wall of hollow tube 1, on annulus 2, offer two electrode cable-through holes 4 along the outer wall place of hollow tube 1; Hollow tube 1 Closed End is provided with arc-shaped electrode 7, sensitive membrane 8, catalytic membrane 9 and the diaphragm 10 that is connected with signal wire; On the sidewall circumference of hollow tube 1 blind end, be printed with porous heating film 5, and on the sidewall of hollow tube 1, also be printed with the heating electrode 6 that is connected with porous heating film 5 through electrode cable-through hole 4; Matrix surface between closed end and annulus is coated with thermal insulation protection mould 11.
According to above structure, the applicant has provided following several concrete preparation examples:
Embodiment 1: at first be that 90% aluminium oxide ceramics powder is made slurry with mass percent, adopt slip casting method to make ceramic matrix with ceramic process, termination thickness is 1mm; Regulate grand star C-7001 platinum slurry with 4% ethyl cellulose aqueous solution and make its viscosity reach print request, stirred 15 minutes down at 60 ℃ then, be cooled to 20 ℃ as the heating film slurry; Make matrix reach seven grades of smoothnesss through the sub-micron uniform polish matrix, use ultrasonic cleaning; With thickness is that the corrosion resistant plate of 3mm is made printing stencil, the printing surface two ends width ratio of template is 1.1: 1.3, and the mould printing face is carried out the submillimeter level lines handle, during printing, at first the printing surface in this template floods the heating film slurry, the printing porous of rolling on the sidewall circumference of hollow tube 1 blind end again heating film 5 is displayed levelling with 30 rev/mins rotating speed then, and the rotational speed with 30 rev/mins is dried in 250 ℃ infrared drying oven again; With the signal wire hole 3 of grand star C-7001 platinum slurry impregnation matrix, and printing platinum slurry forms arc-shaped electrode 7 on the end face of matrix blind end, prints Ti after the infrared oven dry then
(1-0.075)Sn
(0.070)Nb
(0.005)Thick film ink forms sensitive membrane 8, after the infrared oven dry 1200 ℃ of roastings 3 hours; PdCl to sensitive membrane 8 usefulness 4%
2Solution applies, and forms catalytic membrane 9 in 4 hours 800 ℃ of following roastings after the infrared oven dry; Use Detitanium-ore-type TiO again
2Slurry coating cylinder end face, the back 820 ℃ of following roastings of infrared oven dry formed diaphragm 10 in 2 hours; Printing 30 minute forms porous heating film electrode 6 850 ℃ of following roastings through the platinum silver paste of porous heating film electrode cable-through hole 4 after the infrared oven dry on the sidewall of matrix.To the surface applied insulation protection film slurry between the annulus, 820 ℃ following roastings 20 minute form insulation protection film 11 after the infrared oven dry at the blind end of matrix.The sensor normal temperature resistance of present embodiment preparation is 3.5～5 ohm, and the energising heating is after 20 seconds, and the end face temperature is 400 ℃.At the internal combustion engine gas temperature is 150 ℃～600 ℃, starts in 20 seconds, and air/fuel is than 0.98～1.02.
Embodiment 2: at first be that 95% aluminium oxide ceramics powder is made slurry with mass percent, adopt slip casting method to make ceramic matrix with ceramic process, termination thickness is 1mm; In grand star C-7001 platinum slurry, press platinum slurry mass percent 10% adding granularity less than 2 microns rutile TiO
2, the ethyl cellulose aqueous solution with 4% is regulated slurry makes its viscosity reach print request, stirs 20 minutes down at 55 ℃ then, is cooled to 25 ℃ as the heating film slurry; Make matrix reach seven grades of smoothnesss through the sub-micron uniform polish matrix, use ultrasonic cleaning; With thickness is that the corrosion resistant plate of 3mm is made printing stencil, the printing surface two ends width ratio of template is 1.1: 1.3, and the mould printing face is carried out the submillimeter level lines handle, during printing, at first the printing surface in this template floods the heating film slurry, the printing porous of rolling on the sidewall circumference of hollow tube 1 blind end again heating film 5 is displayed levelling with 5 rev/mins rotating speed then, and the rotational speed with 5 rev/mins is dried in 300 ℃ infrared drying oven again; With the signal wire hole 3 of grand star C-7001 platinum slurry impregnation matrix, and printing platinum slurry forms arc-shaped electrode 7 on the end face of matrix blind end, and the TiO of Pt is mixed in printing after the infrared oven dry
2The responsive slurry of type forms sensitive membrane 8, after the infrared oven dry 1350 ℃ of roastings 1 hour; PdCl to sensitive membrane 8 usefulness 4%
2Solution applies, and forms catalytic membrane 9 in 1 hour 850 ℃ of following roastings after the infrared oven dry; Use Detitanium-ore-type TiO again
2Slurry coating cylinder end face, the back 820 ℃ of following roastings of infrared oven dry formed diaphragm 10 in 1 hour; Printing 10 minute forms porous heating film electrode 6 850 ℃ of following roastings through the silver slurry of porous heating film electrode cable-through hole 4 after the infrared oven dry on the sidewall of matrix.To the surface applied insulation protection film slurry between the annulus, 820 ℃ following roastings 20 minute form insulation protection film 11 after the infrared oven dry at the blind end of matrix.5 ohm of the sensor normal temperature resistances of present embodiment preparation, the energising heating is after 20 seconds, and the end face temperature is 500 ℃.At the internal combustion engine gas temperature is 150 ℃～700 ℃, starts in 20 seconds, and air/fuel is than 0.98～1.02.
Embodiment 3: at first be that 99% aluminium oxide ceramics powder is made slurry with mass percent, adopt slip casting method to make ceramic matrix with ceramic process, termination thickness is 1mm; In grand star C-7001 platinum slurry, press platinum slurry mass percent 5% adding granularity less than 2 microns rutile TiO
2, the polyvinyl alcohol water solution with 5% is regulated slurry makes its viscosity reach print request, stirs 10 minutes down at 65 ℃ then, is cooled to 15 ℃ as the heating film slurry; Make matrix reach seven grades of smoothnesss through the sub-micron uniform polish matrix, use ultrasonic cleaning, with thickness is that the corrosion resistant plate of 3mm is made printing stencil, the printing surface two ends width ratio of template is 1.1: 1.3, and the mould printing face is carried out the submillimeter level lines handle, during printing, at first the printing surface in this template floods the heating film slurry, the printing porous of on the sidewall circumference of hollow tube 1 blind end, rolling again heating film 5, display levelling with 20 rev/mins rotating speed then, the rotational speed with 20 rev/mins is dried in 280 ℃ infrared drying oven again; With the signal wire hole 3 of grand star C-7001 platinum slurry impregnation matrix, and printing platinum slurry forms arc-shaped electrode 7 on the end face of matrix blind end, printing Pd crystal boundary diffusion TiO after the infrared oven dry
2The responsive slurry of type forms sensitive membrane 8, after the infrared oven dry 1200 ℃ of roastings 4 hours; PdCl to sensitive membrane 8 usefulness 4%
2Solution applies, and forms catalytic membrane 9 in 2 hours 820 ℃ of following roastings after the infrared oven dry; Use Detitanium-ore-type TiO again
2Slurry coating cylinder end face, the back 820 ℃ of following roastings of infrared oven dry formed diaphragm 10 in 1.5 hours; Printing 20 minute forms porous heating film electrode 6 850 ℃ of following roastings through the platinum slurry of porous heating film electrode cable-through hole 4 after the infrared oven dry on the sidewall of matrix.To the surface applied insulation protection film slurry between the annulus, 820 ℃ following roastings 20 minute form insulation protection film 11 after the infrared oven dry at the blind end of matrix.The resistance of sensor of present embodiment preparation is between 4～6 ohm, and the energising heating is after 20 seconds, and the end face temperature is 550 ℃.At the internal combustion engine gas temperature is 150 ℃～700 ℃, starts in 20 seconds, and air/fuel is than 0.98～1.02.
Embodiment 4: at first be that 99% aluminium oxide ceramics powder is made slurry with mass percent, adopt slip casting method to make ceramic matrix with ceramic process, termination thickness is 0.5mm; In grand star C-7001 platinum slurry, press platinum slurry mass percent 3% adding granularity less than 2 microns rutile TiO
2, the ethyl cellulose aqueous solution with 4% is regulated slurry makes its viscosity reach print request, stirs 20 minutes down at 55 ℃ then, is cooled to 25 ℃ as the heating film slurry; Make matrix reach seven grades of smoothnesss through the sub-micron uniform polish matrix, use ultrasonic cleaning; With thickness is that the corrosion resistant plate of 3mm is made printing stencil, the printing surface two ends width ratio of template is 1.1: 1.3, and the mould printing face is carried out the submillimeter level lines handle, during printing, at first the printing surface in this template floods the heating film slurry, the printing porous of rolling on the sidewall circumference of hollow tube 1 blind end again heating film 5 is displayed levelling with 15 rev/mins rotating speed then, and the rotational speed with 15 rev/mins is dried in 260 ℃ infrared drying oven again; With the signal wire hole 3 of grand star C-7001 platinum slurry impregnation matrix, and printing platinum slurry forms arc-shaped electrode 7 on the end face of matrix blind end, and the TiO of Pt is mixed in printing after the infrared oven dry
2The responsive slurry of type forms sensitive membrane 8, roasting 1.5 hours in 1250 ℃ after the infrared oven dry; PdCl to sensitive membrane 8 usefulness 4%
2Solution applies, and forms catalytic membrane 9 in 2.5 hours 840 ℃ of following roastings after the infrared oven dry; Use Detitanium-ore-type TiO again
2Slurry coating cylinder end face, the back 820 ℃ of following roastings of infrared oven dry formed diaphragm 10 in 1.3 hours; Printing 15 minute forms porous heating film electrode 6 850 ℃ of following roastings through the gold paste of porous heating film electrode cable-through hole 4 after the infrared oven dry on the sidewall of matrix.To the surface applied insulation protection film slurry between the annulus, 820 ℃ following roastings 20 minute form insulation protection film 11 after the infrared oven dry at the blind end of matrix.The resistance of sensor of present embodiment preparation is between 3.5～5 ohm, and the energising heating is after 20 seconds, and the end face temperature is 600 ℃.At the internal combustion engine gas temperature is 150 ℃～700 ℃, starts in 20 seconds, and air/fuel is than 0.98～1.02.
Embodiment 5: at first be that 99% aluminium oxide ceramics powder is made slurry with mass percent, adopt slip casting method to make ceramic matrix with ceramic process, termination thickness 0.8mm; In grand star C-7001 platinum slurry, press platinum slurry mass percent 8% adding granularity less than 2 microns rutile TiO
2, the ethyl cellulose aqueous solution with 4% is regulated slurry makes its viscosity reach print request, stirs 15 minutes down at 63 ℃ then, is cooled to 22 ℃ as the heating film slurry; Make matrix reach seven grades of smoothnesss through the sub-micron uniform polish matrix, use ultrasonic cleaning; With thickness is that the corrosion resistant plate of 3mm is made printing stencil, the printing surface two ends width ratio of template is 1.1: 1.3, and the mould printing face is carried out the submillimeter level lines handle, during printing, at first the printing surface in this template floods the heating film slurry, the printing porous of rolling on the sidewall circumference of hollow tube 1 blind end again heating film 5 is displayed levelling with 25 rev/mins rotating speed then, and the rotational speed with 25 rev/mins is dried in 290 ℃ infrared drying oven again; With the signal wire hole 3 of grand star C-7001 platinum slurry impregnation matrix, and printing platinum slurry forms arc-shaped electrode 7 on the end face of matrix blind end, printing Pd crystal boundary diffusion TiO after the infrared oven dry
2The responsive slurry of type forms sensitive membrane 8, roasting 2.5 hours in 1250 ℃ after the infrared oven dry; PdCl to sensitive membrane 8 usefulness 4%
2Solution applies, and forms catalytic membrane 9 in 4 hours 820 ℃ of following roastings after the infrared oven dry; Use Detitanium-ore-type TiO again
2Slurry coating cylinder end face, the back 820 ℃ of following roastings of infrared oven dry formed diaphragm 10 in 1.6 hours; Printing 22 minute forms porous heating film electrode 6 850 ℃ of following roastings through the gold paste of porous heating film electrode cable-through hole 4 after the infrared oven dry on the sidewall of matrix.To the surface applied insulation protection film slurry between the annulus, 820 ℃ following roastings 20 minute form insulation protection film 11 after the infrared oven dry at the blind end of matrix.The resistance of sensor of present embodiment preparation is between 3.5～5 ohm, and the energising heating is after 20 seconds, and the end face temperature is 550 ℃.At the internal combustion engine gas temperature is 150 ℃～700 ℃, starts in 20 seconds, and air/fuel is than 0.98～1.02
Embodiment 6: at first be that 99% aluminium oxide ceramics powder is made slurry with mass percent, adopt slip casting method to make ceramic matrix with ceramic process, termination thickness is 1.2mm; In grand star C-7001 platinum slurry, press platinum slurry mass percent 2% adding granularity less than 2 microns rutile TiO
2, the polyvinyl alcohol water solution with 5% is regulated slurry makes its viscosity reach print request, stirs 18 minutes down at 60 ℃ then, is cooled to 24 ℃ as the heating film slurry; Make matrix reach seven grades of smoothnesss through the sub-micron uniform polish matrix, use ultrasonic cleaning; With thickness is that the corrosion resistant plate of 3mm is made printing stencil, the printing surface two ends width ratio of template is 1.1: 1.3, and the mould printing face is carried out the submillimeter level lines handle, during printing, at first the printing surface in this template floods the heating film slurry, the printing porous of rolling on the sidewall circumference of hollow tube 1 blind end again heating film 5 is displayed levelling with 10 rev/mins rotating speed then, and the rotational speed with 10 rev/mins is dried in 270 ℃ infrared drying oven again; With the signal wire hole 3 of grand star C-7001 platinum slurry impregnation matrix, and printing platinum slurry forms arc-shaped electrode 7 on the end face of matrix blind end, prints Ti after the infrared oven dry
(1-0.075)Sn
(0.070)Nb
(0.005)Thick film ink forms sensitive membrane 8, roasting 2 hours in 1300 ℃ after the infrared oven dry; PdCl to sensitive membrane 8 usefulness 4%
2Solution applies, and forms catalytic membrane 9 in 2.5 hours 830 ℃ of following roastings after the infrared oven dry; Use Detitanium-ore-type TiO again
2Slurry coating cylinder end face, the back 820 ℃ of following roastings of infrared oven dry formed diaphragm 10 in 1.8 hours; Printing 30 minute forms porous heating film electrode 6 850 ℃ of following roastings through the silver slurry of porous heating film electrode cable-through hole 4 after the infrared oven dry on the sidewall of matrix.To the surface applied insulation protection film slurry between the annulus, 820 ℃ following roastings 20 minute form insulation protection film 11 after the infrared oven dry at the blind end of matrix.The resistance of sensor of present embodiment preparation is between 3.5～5 ohm, and the energising heating is after 20 seconds, and the end face temperature is 500 ℃.At the internal combustion engine gas temperature is 150 ℃～600 ℃, starts in 20 seconds, and air/fuel is than 0.98～1.02.
Claims (7)
1, monomer integrated type oxygen sensor for automotive air fuel ratio control, it is characterized in that: comprise matrix, this matrix be one cylindric, end sealing and inner for the hollow tube of cavity structure (1) and with hollow tube (1) be the annulus (2) of the projection of one, offer signal wire hole (3) between the inside and outside wall of hollow tube (1), on annulus (2), offer two electrode cable-through holes (4) along the outer wall place of hollow tube (1); Hollow tube (1) Closed End is provided with arc-shaped electrode (7), sensitive membrane (8), catalytic membrane (9) and the diaphragm (10) that is connected with signal wire; On the sidewall circumference of hollow tube (1) blind end, be printed with porous heating film (5), and on the sidewall of hollow tube (1), also be printed with the heating electrode (6) that is connected with porous heating film (5) through electrode cable-through hole (4); Matrix surface between closed end and annulus is coated with insulation protection film (11).
2, monomer integrated type oxygen sensor for automotive air fuel ratio control according to claim 1 is characterized in that: the thickness of said hollow tube (1) blind end is 0.5-1.2mm, and the wall thickness of hollow tube is 0.5mm-1.5mm.
3, the preparation method of the described monomer integrated type oxygen sensor for automotive air fuel ratio control of a kind of claim 1 is characterized in that:
1) at first is that 90%～99% aluminium oxide ceramics powder is made slurry, adopts slip casting method to make ceramic matrix with ceramic process with mass percent;
2) granularity of press platinum slurry quality adding 0～10% in grand star C-7001 platinum slurry is less than 2 microns rutile TiO
2, regulate slurry with thinning agent and make its viscosity reach print request, stirred 10～20 minutes down at 55 ℃～65 ℃ then, be cooled to 15～25 ℃ as the heating film slurry;
3) make its surface reach seven grades of smoothnesss through the sub-micron uniform polish matrix, use ultrasonic cleaning, with thickness is that the corrosion resistant plate of 3mm is made printing stencil, the printing surface two ends width ratio of template is 1.1: 1.3, and the mould printing face is carried out the submillimeter level lines handle, during printing, at first the printing surface in this template floods the heating film slurry, printing porous heating film (5) again rolls on the sidewall circumference of hollow tube (1) blind end, display levelling with 5～30 rev/mins rotating speed then, the rotational speed with 5～30 rev/mins is dried in 250 ℃～300 ℃ infrared drying oven again;
4) with the signal wire hole (3) of grand star C-7001 platinum slurry impregnation matrix, and printing platinum slurry forms arc-shaped electrode (7) on the end face of matrix blind end, the responsive slurry of printing forms sensitive membrane (8) after the infrared oven dry, after the infrared oven dry 1200 ℃～1350 ℃ roasting 1-3 hour;
5) after step 4 is finished, 4% PdCl to sensitive membrane (8) with mass percent
2Solution applies, and forms catalytic membrane (9) in 1～4 hour 820 ℃～850 ℃ following roastings after the infrared oven dry;
6) use Detitanium-ore-type TiO again
2Slurry coating cylinder end face, the back 820 ℃ of following roastings of infrared oven dry formed diaphragm (10) in 1～2 hour;
7) printing formed porous heating film electrode (6) through the heating electrode slurry of porous heating film electrode cable-through hole (4) at 830 ℃ of following roasting 10-30 minutes after the infrared oven dry on the sidewall of matrix;
8) matrix after the 7th step handled to the surface applied insulation protection film slurry between the annulus, 820 ℃ following roastings 20 minute forms insulation protection film (11) after the infrared oven dry at the blind end of matrix.
4, the preparation method of monomer integrated type oxygen sensor for automotive air fuel ratio control according to claim 3 is characterized in that: said thinning agent is ethyl cellulose aqueous solution, terpinol or polyvinyl alcohol water solution.
5, the preparation method of monomer integrated type oxygen sensor for automotive air fuel ratio control according to claim 3 is characterized in that: said responsive slurry is the TiO that mixes Pt
2The responsive slurry of type, Pd crystal boundary diffusion TiO
2Responsive slurry of type or Ti
(1-0.075)Sn
(0.070)Nb
(0.005)Thick film ink.
6, the preparation method of monomer integrated type oxygen sensor for automotive air fuel ratio control according to claim 3 is characterized in that: said heating electrode slurry is platinum silver paste, silver slurry or platinum slurry, gold paste.
7, the preparation method of monomer integrated type oxygen sensor for automotive air fuel ratio control according to claim 3 is characterized in that: said thermal insulation protection membrane material is grand star I-4385 slurry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610043114XA CN100434905C (en) | 2006-07-06 | 2006-07-06 | Monomer integrated type oxygen sensor for automotive air fuel ratio control and process for preparing the same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610043114XA CN100434905C (en) | 2006-07-06 | 2006-07-06 | Monomer integrated type oxygen sensor for automotive air fuel ratio control and process for preparing the same |
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| Publication Number | Publication Date |
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| CN1885016A true CN1885016A (en) | 2006-12-27 |
| CN100434905C CN100434905C (en) | 2008-11-19 |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| GB1201806A (en) * | 1967-11-23 | 1970-08-12 | Kent Ltd G | Improvements in or relating to electrode assemblies |
| FR2252041A5 (en) * | 1973-11-16 | 1975-06-13 | Thomson Csf | |
| JPS595943A (en) * | 1982-07-02 | 1984-01-12 | Fujikura Ltd | Oxygen concentration sensor |
| CN1221109A (en) * | 1997-09-13 | 1999-06-30 | 三星电机株式会社 | Oxygen sensor |
| US6426631B1 (en) * | 1999-04-28 | 2002-07-30 | Kyocera Corporation | Oxygen sensor device incorporating a heater therein |
| CN1298100A (en) * | 1999-11-24 | 2001-06-06 | 四川大学 | Gas-sensitive sensor heated by PTC thermo-sensitive material |
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