JP2003288919A - Electric conductive ceramic and its manufacturing method, and inter connector for solid oxide fuel cell using the same - Google Patents
Electric conductive ceramic and its manufacturing method, and inter connector for solid oxide fuel cell using the sameInfo
- Publication number
- JP2003288919A JP2003288919A JP2002090465A JP2002090465A JP2003288919A JP 2003288919 A JP2003288919 A JP 2003288919A JP 2002090465 A JP2002090465 A JP 2002090465A JP 2002090465 A JP2002090465 A JP 2002090465A JP 2003288919 A JP2003288919 A JP 2003288919A
- Authority
- JP
- Japan
- Prior art keywords
- electrically conductive
- fuel cell
- solid oxide
- oxide fuel
- interconnector
- 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.)
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Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Compositions Of Oxide Ceramics (AREA)
- Fuel Cell (AREA)
Abstract
Description
【０００１】[0001]
【技術分野】本発明は、電気伝導性セラミックスおよび
その製造方法、ならびにそれを用いた固体酸化物形燃料
電池用インターコネクタ、特にインターコネクタの形成
材料の改良に関するものである。TECHNICAL FIELD The present invention relates to an electrically conductive ceramic, a method for producing the same, and an interconnector for a solid oxide fuel cell using the same, and more particularly to improvement of a material for forming the interconnector.
【０００２】[0002]
【従来技術】燃料電極と酸化剤電極がセラミックスの電
解質を介して配置され、燃料として最終的に水素を、酸
化剤として酸素や空気を供給することで、水の電気分解
の逆の反応を利用して発電する固体酸化物形燃料電池で
は、燃料電池の実用上十分な発電量を得るためには、上
述の固体酸化物形燃料電池の単位構成要素（単セル）を
複数個、直列および並列に電気的に接続すること（スタ
ック化）が必要となる。2. Description of the Related Art A fuel electrode and an oxidizer electrode are arranged via a ceramic electrolyte, and hydrogen is finally supplied as a fuel, and oxygen and air are supplied as an oxidizer, thereby utilizing the reverse reaction of electrolysis of water. In order to obtain a sufficient amount of power generation for a fuel cell, a solid oxide fuel cell that generates electric power by using a plurality of unit components (single cells) of the solid oxide fuel cell described above in series and in parallel. Need to be electrically connected to (stacking).
【０００３】燃料電池動作の際には、電池の負極側（燃
料電極側）では還元雰囲気に、正極側（酸化剤電極側）
では酸化雰囲気に晒され、かつ、十分な発電効率を得る
ためには、電解質のイオン伝導性を確保し容易に酸化還
元がおこる６００℃以上の高温に燃料電池本体を保つ必
要がある。During fuel cell operation, the negative electrode side (fuel electrode side) of the cell is in a reducing atmosphere and the positive electrode side (oxidizer electrode side).
Then, in order to be exposed to an oxidizing atmosphere and to obtain sufficient power generation efficiency, it is necessary to maintain the ionic conductivity of the electrolyte and to keep the fuel cell main body at a high temperature of 600 ° C. or higher at which redox easily occurs.
【０００４】従って、固体酸化物形燃料電池におけるセ
ル間接続では正極もしくは負極の一方をガス不透過でか
つ電気伝導性のあるセラミックス材料（インターコネク
タ）で被覆しこのインターコネクタとインターコネクタ
で被覆しなかった電極を高温酸化雰囲気下もしくは高温
還元雰囲気下において電気的に接続しなければならな
い。Therefore, in the inter-cell connection in the solid oxide fuel cell, one of the positive electrode and the negative electrode is covered with a gas-impermeable and electrically conductive ceramic material (interconnector) and covered with this interconnector and the interconnector. The missing electrodes must be electrically connected in a high temperature oxidizing atmosphere or a high temperature reducing atmosphere.
【０００５】[0005]
【発明が解決しようとする課題】従来、インターコネク
タ用の材料には酸化還元両方の雰囲気における安定性と
イオン伝導性の小さいことが要求されることから、Ｃａ
ＯあるいはＳｒＯを固溶したランタンクロマイト系の電
気伝導性セラミックスが用いられている。Conventionally, since materials for interconnectors are required to have low stability in both redox atmosphere and low ionic conductivity, Ca
Lanthanum chromite type electrically conductive ceramics in which O or SrO is dissolved is used.
【０００６】しかしながら、このランタンクロマイト系
セラミックスは、還元雰囲気において電気伝導度が低下
するため、セル間の電気抵抗が十分に小さいものとはな
りきれず、燃料電池自身の内部抵抗の増加となる。この
ことが燃料電池の性能向上を阻んでいる。However, this lanthanum chromite-based ceramic has a low electric conductivity in a reducing atmosphere, so that the electric resistance between the cells cannot be sufficiently small, and the internal resistance of the fuel cell itself increases. This hinders the performance improvement of the fuel cell.
【０００７】本発明は、還元雰囲気においてランタンク
ロマイト系セラミックス材料よりも電気伝導性の高い材
料及びその製造方法を提供し、その材料を用いたインタ
ーコネクタによって固体酸化物形燃料電池を構成するこ
とにより当該燃料電池の高性能化を図ることを目的とす
る。The present invention provides a material having higher electrical conductivity than a lanthanum chromite ceramic material in a reducing atmosphere and a method for producing the same, and a solid oxide fuel cell is constructed by an interconnector using the material. The purpose is to improve the performance of the fuel cell.
【０００８】[0008]
【課題を解決するための手段】上記課題を解決するた
め、本発明による電気伝導性セラミックスは、組成が下
記化学式で表されることを特徴とする。In order to solve the above problems, the electrically conductive ceramics according to the present invention are characterized in that the composition is represented by the following chemical formula.
【０００９】（Ｌａ1-xＭx）ＴｉＯ3±δ
（ただし式中、ＭはＳｒ，Ｂａ，Ｃａから選ばれる少な
くとも１種類の元素からなり、ｘは０≦ｘ≦１．０を示
す）(La 1-x M x ) TiO 3 ± δ (where M is at least one element selected from Sr, Ba and Ca, and x is 0 ≦ x ≦ 1.0)
【００１０】さらに 本発明による電気伝導性セラミッ
クスは、組成が下記化学式で表されることを特徴とす
る。Further, the electrically conductive ceramics according to the present invention is characterized in that the composition is represented by the following chemical formula.
【００１１】ＳｃmＭｇnＴｉ(2-m-n)Ｏ3±δ
（ただし、式中、ｎ，ｍは０≦ｍ≦１．０、０≦ｎ≦
１．０、ｍ＋ｎ＝１．０を示す）Sc m Mg n Ti (2-mn) O 3 ± δ (where n and m are 0 ≦ m ≦ 1.0 and 0 ≦ n ≦
1.0, m + n = 1.0 is shown)
【００１２】本発明は上述のような電気伝導性セラミッ
クスを製造する方法を提供するものであり、
（Ｌａ1-xＭx）ＴｉＯ3±δ
（ただし式中、ＭはＳｒ，Ｂａ，Ｃａから選ばれる少な
くとも１種類の元素からなり、ｘは０≦ｘ≦１．０を示
す）で示される電気伝導性セラミックスを製造する電気
伝導性セラミックスの製造方法において、前記構成金属
の酸化物をｘが上記範囲になるように混合し、還元雰囲
気中で焼成することを特徴とする。The present invention provides a method for producing the electrically conductive ceramics as described above, wherein (La 1-x M x ) TiO 3 ± δ (where M is Sr, Ba or Ca) In the method for producing an electrically conductive ceramic, which comprises at least one selected element, and x represents 0 ≦ x ≦ 1.0), the oxide of the constituent metal is It is characterized in that they are mixed so as to be in the above range and are fired in a reducing atmosphere.
【００１３】さらに本発明による電気伝導性セラミック
スの製造方法は、
ＳｃmＭｇnＴｉ(2-m-n)Ｏ3±δ
（ただし、式中、ｎ，ｍは０≦ｍ≦１．０、０≦ｎ≦
１．０、ｍ＋ｎ＝１．０を示す）で示される電気伝導性
セラミックスを製造する電気伝導性セラミックスの製造
方法において、前記構成金属の酸化物をｎおよびｍが上
記範囲になるように混合し、還元雰囲気中で焼成するこ
とを特徴とする。Further, the method for producing the electrically conductive ceramics according to the present invention is as follows: Sc m Mg n Ti (2-mn) O 3 ± δ (where n and m are 0 ≦ m ≦ 1.0 and 0 ≦ n ≦
1.0, m + n = 1.0), in the method for producing an electrically conductive ceramic, wherein the oxides of the constituent metals are mixed so that n and m are in the above ranges. , Firing in a reducing atmosphere.
【００１４】本発明はまた、上述の電気伝導性セラミッ
クスを使用した固体酸化物形燃料電池用インターコネク
タに関するものであり、本発明による固体酸化物形燃料
電池用インターコネクタは、組成が下記化学式で表され
る電気伝導性セラミックスからなることを特徴とする。The present invention also relates to a solid oxide fuel cell interconnector using the above-mentioned electrically conductive ceramics. The solid oxide fuel cell interconnector according to the present invention has a composition represented by the following chemical formula. It is characterized by being made of the electrically conductive ceramics represented.
【００１５】（Ｌａ1-xＭx）ＴｉＯ3±δ
（ただし式中、ＭはＳｒ，Ｂａ，Ｃａから選ばれる少な
くとも１種類の元素からなり、ｘは０≦ｘ≦１．０を示
す）
また本発明による第２の固体酸化物形燃料電池用インタ
ーコネクタは、組成が下記化学式で表される電気伝導性
セラミックスからなることを特徴とする。(La 1-x M x ) TiO 3 ± δ (where M is at least one element selected from Sr, Ba and Ca, and x is 0 ≦ x ≦ 1.0) Further, the second interconnector for a solid oxide fuel cell according to the present invention is characterized in that the composition is composed of an electrically conductive ceramic represented by the following chemical formula.
【００１６】ＳｃmＭｇnＴｉ(2-m-n)Ｏ3±δ
（ただし、式中、ｎ，ｍは０≦ｍ≦１．０、０≦ｎ≦
１．０、ｍ＋ｎ＝１．０を示す）Sc m Mg n Ti (2-mn) O 3 ± δ (where, n and m are 0 ≦ m ≦ 1.0 and 0 ≦ n ≦
1.0, m + n = 1.0 is shown)
【００１７】さらに上述の、固体酸化物形燃料電池用イ
ンターコネクタは、前記電気伝導性セラミックスを還元
雰囲気側に、ランタンクロマイト系材料を酸化雰囲気側
に用いることを特徴とする。Further, the above-mentioned interconnector for a solid oxide fuel cell is characterized in that the electrically conductive ceramics are used in the reducing atmosphere side and the lanthanum chromite material is used in the oxidizing atmosphere side.
【００１８】本発明をさらに詳しく説明する。The present invention will be described in more detail.
【００１９】本発明における、還元雰囲気においてラン
タンクロマイト系セラミックスよりも高い電気伝導度を
有する材料は、（Ｌａ1-xＭx）ＴｉＯ3±δで表される
組成において、式中、ＭはＳｒ，Ｂａ，Ｃａから選ばれ
る少なくとも１種類の元素からなり、ｘは０≦ｘ≦１．
０を満足するように合成され、還元雰囲気で焼成するこ
とを特徴とする電気伝導性セラミックスである。なお、
式中、δはこの種のセラミックスがその環境などによっ
て酸素イオンが若干多すぎたり、少なすぎて、非化学量
論的になることを示している（この明細書中、δは同様
の意味を示している）。In the present invention, the material having a higher electric conductivity than the lanthanum chromite type ceramics in the reducing atmosphere has a composition represented by (La 1-x M x ) TiO 3 ± δ , where M is Sr. , Ba, and Ca, and x is 0 ≦ x ≦ 1.
It is an electrically conductive ceramic which is synthesized so as to satisfy 0 and is fired in a reducing atmosphere. In addition,
In the formula, δ indicates that this type of ceramic becomes non-stoichiometric due to slightly too much or too little oxygen ions depending on its environment (in this specification, δ has the same meaning). Shown).
【００２０】また、本発明における、還元雰囲気におい
てランタンクロマイト系セラミックスよりも高い電気伝
導度を有する材料は、ＳｃmＭｇnＴｉ(2-m-n)Ｏ3±δで
表される組成において、式中、ｎ，ｍは０≦ｍ≦１．
０、０≦ｎ≦１．０、０≦ｍ＋ｎ＝１．０を満足するよ
うに合成され、還元雰囲気で焼成することを特徴とする
電気伝導性セラミックスである。In the present invention, the material having a higher electric conductivity than the lanthanum chromite ceramics in the reducing atmosphere has a composition represented by Sc m Mg n Ti (2-mn) O 3 ± δ , N and m are 0 ≦ m ≦ 1.
It is an electrically conductive ceramic which is synthesized so as to satisfy 0, 0 ≦ n ≦ 1.0 and 0 ≦ m + n = 1.0 and is fired in a reducing atmosphere.
【００２１】これらの材料は還元雰囲気下においてラン
タンクロマイト系材料よりも高い電気伝導性を有してお
り、図１に示した平板型固体酸化物形燃料電池セルのイ
ンターコネクタ１２や図２に示した中心対称平板型固体
酸化物形燃料電池セルのインターコネクタ２２用の材料
として利用できる。すなわち、図１及び図２は、それぞ
れ平板型固体酸化物形燃料電池セルの断面図、中心対称
平板型固体酸化物形燃料電池セルの断面図であり、１
１、および２１は単セルを示している。These materials have higher electrical conductivity than the lanthanum chromite materials in a reducing atmosphere, and are shown in the interconnector 12 of the flat plate type solid oxide fuel cell shown in FIG. 1 and in FIG. Further, it can be used as a material for the interconnector 22 of a centrosymmetric flat plate type solid oxide fuel cell. That is, FIG. 1 and FIG. 2 are a cross-sectional view of a flat plate type solid oxide fuel cell and a center symmetric flat plate solid oxide fuel cell, respectively.
Reference numerals 1 and 21 indicate single cells.
【００２２】また、上記平板型固体酸化物形燃料電池だ
けでなく、例えば（特開昭５７−１３０３８１号）に示
されるような円筒型固体酸化物形燃料電池や（特開平０
６−１６８７２９号）に示される中空平板型固体酸化物
形燃料電池においてインターコネクタ材料として利用で
きる。Further, not only the flat plate type solid oxide fuel cell but also the cylindrical type solid oxide fuel cell as shown in, for example, Japanese Patent Application Laid-Open No. 57-130381 and Japanese Patent Application Laid-Open No.
No. 6-168729), it can be used as an interconnector material in the hollow flat plate type solid oxide fuel cell.
【００２３】しかしながら、本発明で示した材料は酸化
雰囲気において電気伝導度が低下するため、インターコ
ネクタを形成する際、インターコネクタのうち燃料側に
位置する部分に本発明の材料を用いて、空気側に位置す
る部分には従来材料であるランタンクロマイト系セラミ
ックスを用いることでもっとも効果が得られる。However, since the electric conductivity of the materials shown in the present invention is lowered in an oxidizing atmosphere, when the interconnector is formed, the material of the present invention is used in the portion of the interconnector located on the fuel side to remove air. The most effective effect can be obtained by using lanthanum chromite ceramics, which is a conventional material, in the portion located on the side.
【００２４】[0024]
【実施例】以下本発明を実施例に基づいて説明する。EXAMPLES The present invention will be described below based on examples.
【００２５】上記の（Ｌａ1-xＭx）ＴｉＯ3±δ合成に
あたってはＭがＣａ，Ｂａ，Ｓｒいずれの場合にあって
も、ｘが０．５以下の場合は空気中での合成は困難とな
る。In the above-mentioned (La 1-x M x ) TiO 3 ± δ synthesis, when M is Ca, Ba or Sr, when x is 0.5 or less, synthesis in air is not possible. It will be difficult.
【００２６】この場合でも還元雰囲気中、たとえば水素
雰囲気中で焼成することにより電気伝導性のセラミック
ス粉末が得られる。図３にｘ＝０．２とｘ＝０．８の場
合を例として還元雰囲気における電気伝導度を示す。Even in this case, an electrically conductive ceramic powder can be obtained by firing in a reducing atmosphere, for example, a hydrogen atmosphere. FIG. 3 shows the electric conductivity in a reducing atmosphere by taking x = 0.2 and x = 0.8 as an example.
【００２７】各試料は所望の組成になるように、ＳｒＣ
Ｏ3、Ｌａ2Ｏ3、ＴｉＯ2粉末を混合し、窒素雰囲気中で
９００℃仮焼きした後、微量の水素を流した窒素雰囲気
中において１４００℃で焼成して得た。図３の比較から
明らかなように、還元雰囲気における電気伝導度がラン
タンクロマイトと比較して大きくなっている。Ｘ線回折
で確認した結晶構造はペロブスカイト型であった。Each sample is made of SrC so as to have a desired composition.
O 3 , La 2 O 3 , and TiO 2 powders were mixed, calcined at 900 ° C. in a nitrogen atmosphere, and then calcined at 1400 ° C. in a nitrogen atmosphere containing a slight amount of hydrogen. As is clear from the comparison of FIG. 3, the electric conductivity in the reducing atmosphere is higher than that of the lanthanum chromite. The crystal structure confirmed by X-ray diffraction was a perovskite type.
【００２８】実施にあたって、ｘの値は他の材料との熱
膨張係数や焼結特性を考慮して決めることが望まれる。
いずれの値でも還元雰囲気中での電気伝導度はランタン
クロマイト系材料よりも高いものが得られる。In practice, it is desirable that the value of x be determined in consideration of the coefficient of thermal expansion with other materials and the sintering characteristics.
At any value, the electric conductivity in the reducing atmosphere is higher than that of the lanthanum chromite material.
【００２９】またＳｃmＭｇnＴｉ(2-m-n)Ｏ3±δ合成に
あっても同様に、Ｓｃ2Ｏ3、ＭｇＯ、ＴｉＯ2を所望の
組成になるように混合して窒素中で仮焼きした後、微量
の水素を流した窒素雰囲気中において１２００℃にて焼
成することにより、電気伝導性セラミックス粉末が得ら
れる。Also in the Sc m Mg n Ti (2-mn) O 3 ± δ synthesis, similarly, Sc 2 O 3 , MgO, and TiO 2 are mixed so as to have a desired composition, and temporarily mixed in nitrogen. After firing, firing is performed at 1200 ° C. in a nitrogen atmosphere in which a slight amount of hydrogen is flowed to obtain an electrically conductive ceramic powder.
【００３０】このとき、ｍ＋ｎは１に近いことが好まし
い。図４にｍ＝０．１、ｎ＝０．９の場合の還元雰囲気
における電気伝導度を示す。図４より、このセラミック
スにおいてもランタンクロマイト系材料に比べて還元雰
囲気における電気伝導度が高いものであることが判る。At this time, m + n is preferably close to 1. FIG. 4 shows the electric conductivity in a reducing atmosphere when m = 0.1 and n = 0.9. From FIG. 4, it can be seen that this ceramic also has higher electric conductivity in the reducing atmosphere than the lanthanum chromite material.
【００３１】したがってこれらの材料を用いてインター
コネクタを作製することにより、より高性能な固体酸化
物形燃料電池を構成できる。Therefore, by producing an interconnector using these materials, a higher performance solid oxide fuel cell can be constructed.
【００３２】しかしながらこれらの材料は過度の酸化雰
囲気に晒すと、電気伝導性が失われてしまう。それを防
ぐためには、インターコネクタの還元雰囲気に接する部
分に本発明による電気伝導性セラミックスを用い、酸化
雰囲気に接する部分に従来型のランタンクロマイト系の
材料を用いることによって達成することができる。この
ためには、２つの材料を共焼結によって焼成する方法
や、本発明の電気伝導性セラミックスで作られたインタ
ーコネクタ５１の酸化雰囲気側に、図５に平板型インタ
ーコネクタ５１の例を示すように、ランタンクロマイト
の被覆膜５２を溶射法を用いて形成する方法などが考え
られる。However, if these materials are exposed to an excessive oxidizing atmosphere, their electrical conductivity will be lost. In order to prevent this, the electrically conductive ceramics according to the present invention is used in the portion of the interconnector which is in contact with the reducing atmosphere, and the conventional lanthanum chromite material is used in the portion of the interconnector which is in contact with the oxidizing atmosphere. To this end, a method of firing two materials by co-sintering, or an example of a flat plate type interconnector 51 on the oxidizing atmosphere side of the interconnector 51 made of the electrically conductive ceramics of the present invention is shown in FIG. As described above, a method of forming the coating film 52 of lanthanum chromite by using the thermal spraying method can be considered.
【００３３】電気伝導度の測定は、作製した粉末をプレ
ス成型にて５×５×３０ｍｍの角柱状に成型し、その後
１４５０℃で焼成して測定用試料とし、この試料に白金
と白金ぺーストにて４端子をとりつけた後、管状の電気
炉中（直径１０ｃｍ）にて昇温し、還元雰囲気の下で各
温度にて四端子法で電気伝導度の測定を行った。還元雰
囲気としては、窒素９５％水素５％の混合ガスを毎分１
リットルで流した雰囲気とした。The electric conductivity is measured by pressing the produced powder into a column of 5 × 5 × 30 mm by press molding, and then firing at 1450 ° C. to obtain a sample for measurement. Platinum and a platinum paste are added to this sample. After mounting the four terminals in, the temperature was raised in a tubular electric furnace (diameter: 10 cm), and the electrical conductivity was measured by the four-terminal method at each temperature in a reducing atmosphere. As a reducing atmosphere, a mixed gas of 95% nitrogen and 5% hydrogen was used every minute.
The atmosphere was set to flow in liters.
【００３４】[0034]
【発明の効果】以上の説明から明らかなように本発明の
電気伝導性セラミックスは還元雰囲気でランタンクロマ
イト系材料を超える電気伝導性を有する。この特徴を生
かすように本発明の電気伝導性セラミックスを用いて固
体酸化物形燃料電池のインターコネクタを作製すること
で、従来より損失の少ない高性能な固体酸化物形燃料電
池を実現できる。As is apparent from the above description, the electrically conductive ceramics of the present invention have an electrical conductivity that exceeds that of the lanthanum chromite material in the reducing atmosphere. By producing an interconnector for a solid oxide fuel cell using the electrically conductive ceramics of the present invention so as to make full use of this characteristic, a high-performance solid oxide fuel cell with less loss than before can be realized.
【図１】平板型固体酸化物形燃料電池におけるインター
コネクタを説明する断面図。FIG. 1 is a cross-sectional view illustrating an interconnector in a flat plate solid oxide fuel cell.
【図２】中心対称平板型固体酸化物形燃料電池における
インターコネクタを説明する断面図。FIG. 2 is a cross-sectional view illustrating an interconnector in a centrally symmetric flat plate type solid oxide fuel cell.
【図３】還元雰囲気における電気伝導度を示す図。FIG. 3 is a diagram showing electric conductivity in a reducing atmosphere.
【図４】ｍ＝１．０、ｎ＝０．９の場合の還元雰囲気に
おける電気伝導度を示す図。FIG. 4 is a diagram showing electric conductivity in a reducing atmosphere when m = 1.0 and n = 0.9.
【図５】平板型インターコネクタの一例の断面図。FIG. 5 is a cross-sectional view of an example of a flat plate type interconnector.
１１ 単セル １２ インターコネクタ ２１ 単セル ２２ インターコネクタ ５１ 平板型セルのインターコネクタ ５２ 被覆膜 11 single cells 12 Interconnector 21 single cell 22 Interconnector 51 Flat cell interconnector 52 coating
Claims (7)
とする電気伝導性セラミックス。 （Ｌａ1-xＭx）ＴｉＯ3±δ （ただし式中、ＭはＳｒ，Ｂａ，Ｃａから選ばれる少な
くとも１種類の元素からなり、ｘは０≦ｘ≦１．０を示
す）1. An electrically conductive ceramics having a composition represented by the following chemical formula. (La 1-x M x ) TiO 3 ± δ (wherein M is at least one element selected from Sr, Ba, and Ca, and x represents 0 ≦ x ≦ 1.0)
とする電気伝導性セラミックス。 ＳｃmＭｇnＴｉ(2-m-n)Ｏ3±δ （ただし、式中、ｎ，ｍは０≦ｍ≦１．０、０≦ｎ≦
１．０、ｍ＋ｎ＝１．０を示す）2. An electrically conductive ceramic having a composition represented by the following chemical formula. Sc m Mg n Ti (2-mn) O 3 ± δ (where n and m are 0 ≦ m ≦ 1.0 and 0 ≦ n ≦
1.0, m + n = 1.0 is shown)
くとも１種類の元素からなり、ｘは０≦ｘ≦１．０を示
す）で示される電気伝導性セラミックスを製造する電気
伝導性セラミックスの製造方法において、前記構成金属
の酸化物をｘが上記範囲になるように混合し、還元雰囲
気中で焼成することを特徴とする電気伝導性セラミック
スの製造方法。3. (La 1-x M x ) TiO 3 ± δ (wherein M is at least one element selected from Sr, Ba and Ca, and x is 0 ≦ x ≦ 1.0. In the method for producing an electrically conductive ceramic for producing an electrically conductive ceramic as shown in (1), the oxides of the constituent metals are mixed so that x is in the above range, and the mixture is fired in a reducing atmosphere. Manufacturing method of electrically conductive ceramics.
１．０、ｍ＋ｎ＝１．０を示す）で示される電気伝導性
セラミックスを製造する電気伝導性セラミックスの製造
方法において、前記構成金属の酸化物をｎおよびｍが上
記範囲になるように混合し、還元雰囲気中で焼成するこ
とを特徴とする電気伝導性セラミックスの製造方法。4. Sc m Mg n Ti (2-mn) O 3 ± δ (wherein n and m are 0 ≦ m ≦ 1.0 and 0 ≦ n ≦
1.0, m + n = 1.0), in the method for producing an electrically conductive ceramic, wherein the oxides of the constituent metals are mixed so that n and m are in the above ranges. A method for producing electrically conductive ceramics, which comprises firing in a reducing atmosphere.
セラミックスからなることを特徴とする固体酸化物形燃
料電池用インターコネクタ。 （Ｌａ1-xＭx）ＴｉＯ3±δ （ただし式中、ＭはＳｒ，Ｂａ，Ｃａから選ばれる少な
くとも１種類の元素からなり、ｘは０≦ｘ≦１．０を示
す）5. An interconnector for a solid oxide fuel cell, characterized in that the composition is composed of electrically conductive ceramics represented by the following chemical formula. (La 1-x M x ) TiO 3 ± δ (wherein M is at least one element selected from Sr, Ba, and Ca, and x represents 0 ≦ x ≦ 1.0)
セラミックスからなることを特徴とする固体酸化物形燃
料電池用インターコネクタ。 ＳｃmＭｇnＴｉ(2-m-n)Ｏ3±δ （ただし、式中、ｎ，ｍは０≦ｍ≦１．０、０≦ｎ≦
１．０、ｍ＋ｎ＝１．０を示す）6. An interconnector for a solid oxide fuel cell, the composition of which is composed of an electrically conductive ceramic represented by the following chemical formula. Sc m Mg n Ti (2-mn) O 3 ± δ (where n and m are 0 ≦ m ≦ 1.0 and 0 ≦ n ≦
1.0, m + n = 1.0 is shown)
気側に、ランタンクロマイト系材料を酸化雰囲気側に用
いることを特徴とする請求項５または６記載の固体酸化
物形燃料電池用インターコネクタ。7. The interconnector for a solid oxide fuel cell according to claim 5, wherein the electrically conductive ceramic is used on the reducing atmosphere side and the lanthanum chromite material is used on the oxidizing atmosphere side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002090465A JP2003288919A (en) | 2002-03-28 | 2002-03-28 | Electric conductive ceramic and its manufacturing method, and inter connector for solid oxide fuel cell using the same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002090465A JP2003288919A (en) | 2002-03-28 | 2002-03-28 | Electric conductive ceramic and its manufacturing method, and inter connector for solid oxide fuel cell using the same |
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| Publication Number | Publication Date |
|---|---|
| JP2003288919A true JP2003288919A (en) | 2003-10-10 |
Family
ID=29235774
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
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| Country | Link |
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