JP2005315608A - Oxygen pump element and oxygen feeder having element - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To elongate a lifetime of an oxygen pump element by enabling a stable and excellent electric current characteristic for a long period. <P>SOLUTION: This oxygen pump element is equipped with an oxygen-ion conductive solid electrolyte 16, electrode films 17, 18 constituting positive-negative both electrodes formed on both surfaces of the oxygen-ion conductive solid electrolyte 16, a metal foil member 21 bonded to electrode film peripheral parts of the positive-negative both electrodes 17, 18, and lead members 29, 30 connected to the metal foil member 21. The metal foil member 21 having a connection structure to the electrode films 17, 18 is constituted so that a conductive film layer 22 is formed on a bonding part, and that a conductive film linked to the conductive film layer 22 is formed with a prescribed width on both-side surface parts of the metal foil member 21. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an oxygen pump element using an oxygen ion conductive solid electrolyte and an oxygen supply device equipped with the element.

  Conventionally, an oxygen pump element shown in FIG. 5 has been disclosed as this type of oxygen pump element (see, for example, Patent Document 1). The oxygen pump element is configured by forming electrode films 2 and 3 on both sides of the oxygen ion conductive substrate 1. Lead members 4 and 5 are respectively taken out from specific portions from the respective electrode films and connected to a power source (not shown). The oxygen ion conductive substrate 1 is held by a support material 6.

  Moreover, as this type of oxygen pump element device, there is one as shown in FIG. 6 (see, for example, Patent Document 2). In FIG. 6, the oxygen pump element 7 includes a first electrode 9 formed on a porous substrate 8 such as alumina, a thin film 10 of oxygen ion conductor, and a second electrode 11, and the first electrode film 9 is made of platinum. These fine particles are formed on the porous substrate 8, and the second electrode 11 has a structure in which a thin film obtained by combining platinum fine particles with the thin film 10 of the oxygen ion conductor is formed. The heating means 12 is composed of a heater print film 14 formed by patterning a conductive paste on an insulating substrate 13 such as an alumina substrate by screen printing. The heating means 12 is not enclosed in the housing 15 and is in the atmosphere. Arranged in a released state.

In this configuration, when the oxygen pump element 7 is heated to a temperature at which the oxygen pump element 7 operates as an oxygen pump by the heating means 12 and a DC voltage is applied between the first electrode 9 and the second electrode 11 as an anode, As shown in FIG. 5, oxygen in the air dissociated and adsorbed by the first electrode 9 moves as oxygen ions in the thin film 10 of the oxygen ion conductor and is carried to the second electrode 11 to be released into the atmosphere as oxygen molecules. The As a result, the oxygen concentration in the container attached to the housing 15 can be reduced.
JP 2000-86204 A Japanese Patent Laid-Open No. 11-23525

  However, in the oxygen pump element of Patent Document 1, the amount of heat during operation of the oxygen pump element concentrates on the lead members 4 and 5 and local temperature spots are generated on the oxygen ion conductive substrate 2. There was a problem that cracking occurred. For this reason, there has been a problem of how to disperse the large heat generated during the operation of the oxygen pump element without any unevenness and to provide a long-term guarantee for that portion.

  Further, in the configuration of the oxygen pump device of Patent Document 2, since the oxygen pump element 7 and the heating means 12 are released to the atmosphere, the thermal energy from the heating means 12 is not only in the oxygen pump element 7 but also in the atmosphere. It is also used for air heating. As a result, the thermal efficiency is deteriorated, the power consumption of the heating means 12 required to raise the temperature to the temperature at which the oxygen pump element 7 is operated increases, and the oxygen ions of the oxygen pump element It had the problem of poor transport efficiency. Further, in the embodiment, since the heating means 12 is disposed on the upper part of the oxygen pump element 7, the oxygen pump element 7 has a drawback that most of the radiant heat is used and the convection heat of the heated air cannot be used. .

  The present invention solves the above-mentioned conventional problems, suppresses local temperature spots generated in the oxygen pump element, efficiently transmits heat from the heating means to the oxygen pump element, and requires electric power required for heating. An object of the present invention is to provide an oxygen pump device that reduces the amount of oxygen.

  In order to solve the conventional problems, an oxygen pump element of the present invention includes an oxygen ion conductive solid electrolyte, and electrode films constituting positive and negative electrodes formed on both surfaces of the oxygen ion conductive solid electrolyte, The metal foil member joined to the outer peripheral part of the positive and negative electrode film and a lead member connected to the metal foil member, and the metal foil member connected to the electrode film has a conductive layer at the joint portion And a conductive film communicating with the conductive layer is formed on both side surface portions of the metal foil member.

  As a result, thermal strain such as tension that the metal foil member receives in the process of manufacturing the oxygen pump element can be alleviated. Therefore, even when the metal foil is as thin as 10 μm, for example, the member can be finished without warping. Also, when used as an oxygen pump element, a large current flows from the electrode film to the conductive film, but the conductive film having a predetermined width protects against oxidative corrosion of the metal foil against the large amount of heat generated at this time. be able to.

  Further, the oxygen pump element of the present invention includes an oxygen ion conductive solid electrolyte, an electrode film constituting both positive and negative electrodes formed on both surfaces of the oxygen ion conductive solid electrolyte, and an electrode film outer peripheral portion of the positive and negative electrodes A metal foil member joined to the metal foil member, and a lead member connected to the metal foil member. The metal foil member that is connected to the electrode film has a conductive layer formed at the joint portion and a one-side surface portion. A conductive film communicating with the conductive layer is formed to have a predetermined width, and a glass ceramic film is formed on the other surface portion.

  As a result, thermal strain such as tension that the metal foil member receives in the process of manufacturing the oxygen pump element can be alleviated. Therefore, even when the metal foil is as thin as 10 μm, for example, the member can be finished without warping. Also, when used as an oxygen pump element, a large current flows from the electrode film to the conductive film, but the conductive film having a predetermined width protects against oxidative corrosion of the metal foil against the large amount of heat generated at this time. be able to. Moreover, since it is inexpensive and has sufficient mechanical strength as compared with the conductive film material, it is possible to maintain a degree of design freedom by improving the bending strength by devising the printing pattern.

  Since the oxygen pump element of the present invention can have stable and good electric current characteristics over a long period of time, the life of the element can be extended.

  The first invention is joined to an oxygen ion conductive solid electrolyte, an electrode film forming both positive and negative electrodes formed on both surfaces of the oxygen ion conductive solid electrolyte, and an outer peripheral part of the positive and negative electrode film. The metal foil member includes a metal foil member and a lead member connected to the metal foil member, and the metal foil member which is connected to the electrode film has a conductive layer formed at a joint portion and both surfaces of the metal foil member Since the conductive film communicating with the conductive layer has a predetermined width formed in the portion, the metal foil member can relieve thermal strain such as tension received in the process of manufacturing the oxygen pump element. Even when it is thin, it is possible to finish the member without warping. Also, when used as an oxygen pump element, a large current flows from the electrode film to the conductive film, but the conductive film having a predetermined width protects against oxidative corrosion of the metal foil against the large amount of heat generated at this time. be able to.

  The second invention is joined to an oxygen ion conductive solid electrolyte, an electrode film constituting both positive and negative electrodes formed on both surfaces of the oxygen ion conductive solid electrolyte, and an outer periphery of the positive and negative electrode film The metal foil member includes a metal foil member and a lead member connected to the metal foil member, and the metal foil member having a connection structure with the electrode film has a conductive layer formed at a joint portion and the conductive layer on one surface portion The conductive film that communicates with the metal foil member is formed with a predetermined width, and the glass ceramic film is formed with a predetermined width on the other surface portion, so that the metal foil member is subjected to thermal strain such as tension that is received in the manufacturing process of the oxygen pump element. For example, even when the metal foil is as thin as 10 μm, the member can be finished without warping. Also, when used as an oxygen pump element, a large current flows from the electrode film to the conductive film, but the conductive film having a predetermined width protects against oxidative corrosion of the metal foil against the large amount of heat generated at this time. be able to. Moreover, since it is cheaper and has sufficient mechanical strength as compared with the conductive film, it is possible to maintain a degree of design freedom by improving the bending strength by devising the printing pattern.

  In the third invention, in particular, with respect to the metal foil member of the first or second invention, the metal foil member joined to the outer periphery of the positive electrode film or the outer periphery of the negative electrode film is made larger than one, and the lead member By adopting a configuration in which the metal foil member is taken out from one direction based on the magnitude relationship of the metal foil members, the power supply circuit necessary for oxygen ion conduction can be collectively limited in one direction, so that the layout configuration of the apparatus can be simplified. It is also possible to use a large metal foil member as a partitioning means for partitioning a space where the solid electrolyte contacts.

  The fourth invention is a section for partitioning a space where the solid electrolyte is in contact with the metal foil member of the first to third inventions, in particular, the larger one that is connected to the outer periphery of the positive electrode film or the negative electrode film. By configuring as a means, the space can be sufficiently partitioned without increasing the number of necessary parts, and since the material is a metal foil, the specific heat can be reduced, and the temperature can be raised and lowered in a short time.

  In particular, the fifth invention has excellent properties against high-temperature oxidation by using ferritic stainless steel containing aluminum for the metal foil members of the first to fourth inventions. Stable characteristics can be maintained for long-term use around ℃.

  The sixth invention is a perovskite-type composite metal oxide mainly comprising lanthanum and gallium, by using the solid electrolyte of any one of the first to fifth inventions as lanthanum gallate, It has oxygen ion conductivity at 400 ° C or higher. Therefore, since sufficient capability can be obtained by maintaining the operating temperature of the oxygen pump element at a relatively low temperature of about 600 ° C., deterioration of the oxygen pump element can be suppressed even in the long term.

  According to a seventh invention, in particular, the glass ceramic film according to any one of the second to sixth inventions is SiO2-B2O3-MgO-BaO-based and contains an alkaline earth metal oxide in an amount of 15 to 25 wt%. By crystallizing glass containing 2 wt% or less of this oxide, firing at about 800 ° C. resulted in a glass ceramic film crystallized to some extent, and sufficient adhesion to the metal foil could be maintained. As a result, even when the metal foil is heated to a high temperature by a large current, oxidative corrosion can be prevented and the long-term stability of the oxygen pump element can be improved.

  The eighth invention is particularly large in the conductive film formed on the metal foil member by setting the width of the conductive film of any one of the first to seventh inventions or the width of the glass ceramic film to 3 to 7 mm. It was possible to prevent oxidative corrosion even when the vicinity of the junction with the electrode film was locally heated due to current flow, and the long-term stability of the oxygen pump element could be improved.

  In particular, the ninth invention relates to the oxygen pump element according to any one of the first to eighth inventions, voltage application means for applying a voltage to the oxygen pump element, and voltage control means for controlling the voltage application means. Heating means for heating the oxygen pump element; temperature control means for detecting the temperature of the oxygen pump element to control the heating means; and air permeability for preventing thermal diffusion of the heating means and the oxygen pump element. By comprising a heat insulating means and a mixing means for mixing oxygen generated through the oxygen pump element with air to form a mixed gas having a predetermined oxygen concentration, the oxygen pump element and the heating means are directly connected to the atmosphere. Since it is not touched, the heat efficiency of the oxygen pump element by the heating means is improved, the electric power necessary for heating the oxygen pump element can be reduced, and energy saving can be achieved. Moreover, since the whole oxygen pump element can be heated uniformly, the damage prevention effect of the oxygen pump element can be improved. Further, since the oxygen pump element, the partitioning means, and the heating means can be a simple structure covered with a heat insulating material having a ventilation function, the oxygen pump can be miniaturized and can be easily mounted on a device. it can.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 shows a cross-sectional configuration diagram of an oxygen pump element according to the first embodiment of the present invention, and FIG. 2 shows an exploded perspective view of the oxygen pump element.

In FIG. 1, a solid electrolyte 16 is formed by molding a sintered body of substitutional type lanthanum gallate (La _0.8 Sr _0.2 Ga _0.8 Mg _0.2 O ₃ ) into a flat plate having an arbitrary thickness. The positive electrode film 17 and the negative electrode film 18 are coupled to the surface so as to express oxygen ion conductivity.

For the positive electrode film 17 and the negative electrode film 18, a perovskite complex oxide having conductivity was used. Specifically, a paste obtained by mixing Sm _0.5 Sr _0.5 CoO ₃ with a cellulose-based vehicle as an organic solvent is formed by screen printing to form a printed film, dried, and fired at 1100 ° C. A positive and negative electrode film having a thickness of about 10 μm was formed.

  Further, Au porous conductive films 19 and 20 were laminated on the surfaces of the positive electrode film 17 and the negative electrode film 18. In this case, a printed film was formed by screen printing using Au paste, dried, and baked at 800 ° C. to form a conductive film having a thickness of about 3 μm. The conductive films 19 and 20 can improve the surface distribution unevenness of the solid electrolyte with respect to the potential when a voltage is applied between the positive and negative electrode films 17 and 18.

  A conductive metal foil member 21 is connected to the negative electrode film 18 side. As the metal foil member 21, Fe-20Cr-5Al, 12 [mu] m is used, and an opening is provided so that the negative electrode film 18 side is exposed. Conductive films 22 and 23 are formed on both side surfaces of the inner periphery where the metal foil member 21 is connected to the solid electrolyte 18. For the conductive films 22 and 23, a printed film was formed by screen printing using AgPd paste, and after drying, the conductive film having a thickness of about 3 μm was formed with a width of 5 mm by baking at 800 ° C. The positive electrode film 17 side is also connected to a conductive metal foil member 24. Here, the same material as that on the negative electrode film 18 side is used, and an opening is provided so that the positive electrode film 17 side is exposed. Conductive films 25 and 26 are formed on both side surfaces of the inner periphery where the metal foil member 24 is connected to the solid electrolyte 16. The metal foil member 21 disposed on the negative electrode film 18 side is larger than the metal foil member 24 disposed on the positive electrode film 17 side, and is also used as a space partition means when oxygen is selectively transported by the solid electrolyte 16. It has come to be. The metal foil members 21 and 24 are bonded to the conductive film 19 on the positive electrode film 17 side and the conductive film 20 on the negative electrode film 18 side through conductive layers 27 and 28. The conductive layer 27 is made of Au paste, dried and baked at 800 ° C., so that the conductive layer having a film thickness of about 4 μm is formed to be electrically connected to the conductive films 25 and 26 of the metal foil member 24. Also, the conductive layer having a thickness of about 4 μm was formed so as to be electrically connected to the conductive films 22 and 23 of the metal foil member 21 by using Au paste and drying and baking at 800 ° C. Further, the lead member 29 is connected from the conductive film 22 side formed on the metal foil member 21, and the lead member 30 is connected from the conductive film 26 side formed on the metal foil member 24. The insulating member 31 prevents the metal foil member 24 from being short-circuited with the metal foil member 21. As the insulating member 31, a mica sheet having a thickness of 0.3 mm was used. Since the lead members 29 and 30 are arranged in the same direction with respect to the surface of the solid electrolyte 16, the structural layout configuration can be simplified in manufacturing the oxygen supply device.

  FIG. 3 is a schematic cross-sectional configuration diagram of an oxygen supply apparatus using the oxygen pump element.

  Around the metal foil member 21 serving as a space partitioning means for the solid electrolyte, it is fixed to a support 33 with an electrically insulating gas sealant 32.

  In addition, a voltage application unit 34 is connected to the positive electrode film 17 side and the negative electrode film 18 side via a conducting wire, and a voltage control unit 35 is connected to the voltage application unit 34.

  A heater 37 constituting the heating means 36 is disposed opposite to the surface on the negative electrode 18 side, and a temperature control means 38 having means 38 a for detecting the temperature of the solid electrolyte 16 sends a signal to the heating means 36. .

  The means 38a for detecting the temperature of the solid electrolyte 16 may be a temperature sensor or another method. In the case of a sensor, the sensor may be disposed in the vicinity of the solid electrolyte 16 or may be disposed at an arbitrary position. Depending on the temperature of the solid electrolyte 16 detected by the temperature control means 38, the temperature control means 38 performs input control of the heater 37 constituting the heating means 36.

  The heat insulating means 39 and 40 are breathable heat insulating members for suppressing the loss of heat generated by the heater 37. Here, the heat insulating material shape | molded in the flat form which has a silica and an alumina as a main component was used. Each element constituting the oxygen supply apparatus and the container 41 for maintaining the overall shape are provided with an opening 42 for ventilation on the negative electrode film 18 side.

  A gas mixing means 44 is connected to the container 41 on the positive electrode film 17 side through a vent 43. The mixing unit 44 includes a gas induction pipe 45, a mixed gas introduction pipe 46, a gas mixer 47, and a gas pump 48.

  About the oxygen supply apparatus comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, the oxygen supply device is placed in the atmosphere such as room air. At this time, atmospheric components such as nitrogen and oxygen (hereinafter simply referred to as nitrogen and oxygen) pass through the inside of the heat insulating means 39 and 40 which are breathable heat insulating materials constituting the oxygen pump device, and the positive electrode film 17. It is stable in a state of diffusing up to the surface on the side and the negative electrode film 18 side.

  In this state, when the heater 37 is energized by the temperature control means 38, the temperature of the solid electrolyte 16 in the heat insulation means 39 and 40 rises. The temperature control means 38 is energized while controlling the heater 37 so that the temperature required for the operation of the solid electrolyte 16 is about 600 ° C. However, this temperature is not limited, and an operation at an arbitrary temperature is possible according to the characteristics of the solid electrolyte 16.

  When a voltage is applied to the solid electrolyte 16 through the positive electrode film 17 and the negative electrode film 18 when the temperature at which the solid electrolyte 16 can conduct ions is reached, oxygen near the surface on the negative electrode film 18 side becomes electrochemical. Due to the reaction, the inside of the solid electrolyte 16 moves from the negative electrode film 18 to the positive electrode film 17 as oxygen ions, and is released as oxygen molecules from the surface on the positive electrode film 17 side.

  At this time, a low voltage and large current flows through the solid electrolyte 16 and self-heat is generated when a large current flows through the solid electrolyte with the applied voltage. Therefore, the metal foil member used is also exposed to a high temperature state in addition to the atmospheric temperature of 600 ° C. The conductive film formed on the surface of the metal foil member improved the current collecting ability against a large current and could effectively protect against the surface oxidation of the metal foil. In order to prevent the high-temperature oxidation by forming a conductive film on the surface of the metal foil member, it is necessary to have a width of 3 mm or more in the outer peripheral direction from at least the joint with the positive and negative electrode films. Moreover, since an expensive material is wasted even if the width is too large, it is considered that the width of the conductive film formed on the surface of the metal foil member is practically preferably 3 to 7 mm.

  The vicinity of the surface of the positive electrode film 17 is in a state close to pure oxygen. However, as long as gas leakage cannot be completely prevented, the oxygen is separated from the surface of the positive electrode film 17 and the discharged oxygen is naturally mixed with the leaked gas. The Therefore, the metal foil member 21 and the gas sealant 32 which are means for partitioning the space effectively act as means for preventing gas leakage from the negative electrode film 18 side.

  On the other hand, nitrogen is left on the negative electrode film 18 side. The remaining nitrogen diffuses into the atmosphere due to the air permeability of the heat insulating means 40, and new oxygen is supplied from the outside to the negative electrode film 18 side.

  The oxygen gas released from the positive electrode film 17 passes through the vent 43 and constitutes the gas mixing means 44, thereby forming a gas to be mixed by the gas induction pipe 45, the mixed gas introduction pipe 46, and the gas mixer 47. Mixed with. In this embodiment, the mixed gas is the atmosphere. The generated mixed gas is an oxygen-enriched gas, and its flow rate is determined by the suction and discharge speeds of the gas pump 48.

  The oxygen concentration in the mixed gas is determined by the mixed gas flow rate and the amount of oxygen ions flowing through the solid electrolyte 16, that is, the magnitude of the ionic current. The ion current can be controlled by the magnitude of the voltage applied to the solid electrolyte 16.

  Finally, the oxygen concentration in the mixed gas obtained by the oxygen supply device of the present invention is executed by voltage control by the voltage control means 35 and control of the mixed gas flow rate by the gas pump 48.

  As described above, in the present embodiment, the solid electrolyte 16, the positive electrode film 17 side, and the negative electrode film 18 side are coupled so as to exhibit oxygen ion conductivity, and the space portion is partitioned via the solid electrolyte 16. The gas leakage is suppressed by the means, the heating temperature is raised and the voltage is applied, whereby oxygen molecules are released from the positive electrode film 17 to generate a mixed gas enriched with oxygen. By controlling the mixed gas flow rate by the gas pump 48, an arbitrary oxygen concentration gas can be stably obtained.

(Embodiment 2)
FIG. 4 shows a cross-sectional configuration diagram of an oxygen pump element according to the second embodiment of the present invention. Since the schematic configuration is the same as that of the first embodiment, only different parts will be described. The configurations of the electrode film and the conductive film formed on the surface of the solid electrolyte are the same. Here, a configuration in which the conductive film 50 and the glass ceramic film 51 are provided on the metal foil member 49 connected to the positive electrode film side is used, and the lead member 52 is taken out from the conductive film 50. In addition, the metal foil member 53 connected to the negative electrode film side is also provided with a conductive film 54 and a glass ceramic film 55, and the lead member 56 is taken out from the conductive film 54.

  As a glass ceramic material, a crystallized glass containing 20 wt% of an alkaline earth metal oxide and about 1.0 wt% of an alkali metal oxide was used as a SiO 2 —B 2 O 3 —MgO—BaO system. The glass ceramic material is first melted at 1300 ° C., then processed into a cullet state by a roll cooler, and then further pulverized to a predetermined particle size by a ball mill or the like. The crushed glass particles were processed into a printing paste. Since the crystallization start temperature of the crystallized glass is about 770 ° C., after printing, when baked at 800 ° C., crystallization proceeds to some extent, and a glass ceramic film having high thermal shock resistance is formed.

  Even when a low voltage and large current flows through the solid electrolyte by the obtained glass ceramic membrane and heat is transferred to the metal foil member side, the metal foil member can be sufficiently protected from the high temperature oxidation state. As a glass-ceramic material that can be used for such applications, the glass-ceramic film is SiO2-B2O3-MgO-BaO-based, containing 16 to 25 wt% of an alkaline earth metal oxide, and containing 2 wt% or less of an alkali metal oxide. I liked what to do. By suppressing the oxide content of the alkali metal, it is possible to increase the temperature of the glass, and by setting the content of the alkaline earth metal oxide to 16 to 25 wt%, the crystallization start temperature may be set to 750 to 800 ° C. did it.

  In this embodiment, lanthanum gallate is used as the solid electrolyte. However, the present invention is not limited to this, and yttrium-doped zirconia (YSZ), samarium-doped ceria (SDC), or the like may be used. However, at present, the lanthanum gallate material is the most preferable material in view of the durability of the material because the operating temperature is low as an oxygen ion conductor.

  In the present embodiment, the Fe-20Cr-5Al material is used as the metal foil member. However, the present invention is not limited to this, and other metal foil materials may be used as long as the material has durability against high-temperature oxidation. Can be used. However, at present, ferritic stainless steel containing aluminum has excellent characteristics against high-temperature oxidation. Furthermore, it is possible to add a rare earth metal for the purpose of improving the high temperature oxidation resistance. Moreover, although 12 micrometers in thickness was used, it is thought that 5-30 micrometers is preferable as a metal foil member.

  Further, in the present embodiment, as a configuration of the metal foil member, only the case where the solid electrolyte is used as a partitioning means for partitioning the space portion by enlarging the side to be bonded to the negative electrode film side has been described. You may enlarge the direction joined to the film | membrane side.

  In this embodiment, Au-based or AgPd-based is used as the conductive film. However, the present invention is not limited to this, and other materials can be used as long as they have a low resistance and heat resistance.

  Moreover, although this Embodiment demonstrated the case where a electrically conductive film was further arrange | positioned to the positive / negative electrode film on the solid electrolyte surface, it can apply also to the structure which does not arrange | position a electrically conductive film.

  As described above, since the oxygen pump element and the oxygen supply device according to the present invention can obtain stable and good electric current characteristics over a long period of time, an air purifier, an air conditioner, or a health promoting device that uses oxygen, Applicable to a wide range of uses such as health promotion equipment.

Sectional block diagram of the oxygen pump element according to the first embodiment of the present invention The disassembled perspective view of the oxygen pump element in the 1st Embodiment of this invention 1 is a schematic cross-sectional configuration diagram of an oxygen supply device according to a first embodiment of the present invention. Sectional block diagram of the oxygen pump element in the 2nd Embodiment of this invention The figure which shows the oxygen pump element by the conventional patent document 1 reference The figure which shows the oxygen pump element apparatus by the conventional patent document 2 reference

Explanation of symbols

16 Solid Electrolyte 17 Positive Electrode Film 18 Negative Electrode Film 21, 24 Metal Foil Member 22, 23, 27, 28 Conductive Film Layer 25, 26 Conductive Film 29, 30 Lead Member 34 Voltage Application Means 35 Voltage Control Means 36 Heating Means 38 Temperature Control means 39, 40 Heat insulation means 44 Mixing means

Claims (9)

An oxygen ion conductive solid electrolyte, an electrode film constituting both positive and negative electrodes formed on both surfaces of the oxygen ion conductive solid electrolyte, a metal foil member joined to an outer periphery of the positive and negative electrode films, and A lead member connected to the metal foil member, and the metal foil member that is connected to the electrode film has a conductive layer formed at a joint portion and the conductive layer on both side surface portions of the metal foil member. An oxygen pumping element comprising a conductive film that communicates. An oxygen ion conductive solid electrolyte, an electrode film constituting both positive and negative electrodes formed on both surfaces of the oxygen ion conductive solid electrolyte, a metal foil member joined to an outer periphery of the positive and negative electrode films, and A lead member connected to the metal foil member, and the metal foil member having a connection structure with the electrode film has a conductive layer formed at a joint portion and a conductive film communicating with the conductive layer on one side surface portion. An oxygen pump element having a predetermined width and a glass ceramic film formed on the other surface portion. The metal foil member joined to the negative electrode film outer peripheral part is larger than the metal foil member joined to the positive electrode film outer peripheral part, or the positive electrode film outer peripheral part than the metal foil member joined to the negative electrode film outer peripheral part 3. The oxygen pump according to claim 1, wherein the metal foil member joined with the metal foil member is larger, and the lead member is taken out from one direction side based on the magnitude relation of the metal foil member. element. 4. The oxygen pump element according to claim 3, wherein the larger metal foil member joined to the outer peripheral part of the positive and negative electrode films is configured as a partitioning means for partitioning a space part in contact with the solid electrolyte. The oxygen pump element according to any one of claims 1 to 4, wherein the metal foil member is ferritic stainless steel containing aluminum. 6. The oxygen pump element according to claim 1, wherein the solid electrolyte is lanthanum gallate. The glass ceramic film is a crystallized glass containing SiO2B2O3-MgO-BaO and containing 15 to 25 wt% of an alkaline earth metal oxide and 2 wt% or less of an alkali metal oxide. Item 7. The oxygen pump element according to any one of Items 2 to 6. The oxygen pump element according to any one of claims 1 to 7, wherein the width of the conductive film or the width of the glass ceramic film is 3 to 7 mm. The oxygen pump element according to any one of claims 1 to 8, a voltage application means for applying a voltage to the oxygen pump element, a voltage control means for controlling the voltage application means, and heating the oxygen pump element. Heating means, temperature control means for detecting the temperature of the oxygen pump element to control the heating means, breathable heat insulating means for preventing thermal diffusion of the heating means and the oxygen pump element, and the oxygen pump An oxygen supply apparatus comprising: mixing means for mixing oxygen generated through the element with air to form a mixed gas having a predetermined oxygen concentration.

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