IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0577368
(2011-09-14)
|
등록번호 |
US-8815167
(2014-08-26)
|
국제출원번호 |
PCT/JP2011/005195
(2011-09-14)
|
§371/§102 date |
20120806
(20120806)
|
국제공개번호 |
WO2013/038449
(2013-03-21)
|
발명자
/ 주소 |
- Shimoda, Kenji
- Nishio, Kazuaki
- Kinoshita, Yasuo
- Takagaki, Tadashi
|
출원인 / 주소 |
- Toyota Jidosha Kabushiki Kaisha
|
대리인 / 주소 |
Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
3 |
초록
▼
An electrode according to one aspect of the present invention is formed on a base material composed of a ceramics. The electrodes includes a matrix composed of an Ni—Cr alloy (with a Cr content of 20 to 60 wt. %) or an MCrAlY alloy (M is at least one material selected from Fe, Co and Ni), and a disp
An electrode according to one aspect of the present invention is formed on a base material composed of a ceramics. The electrodes includes a matrix composed of an Ni—Cr alloy (with a Cr content of 20 to 60 wt. %) or an MCrAlY alloy (M is at least one material selected from Fe, Co and Ni), and a disperse phase that is dispersed in the matrix and composed of an oxide mineral having a laminated structure. The ratio of area occupied by the disperse phase in a cross section of the electrode is 40 to 80%. With the structure like this, it is possible to suppress the increase in the electrical resistance even after a thermal cycle is performed.
대표청구항
▼
1. An electrode for an electrically heating type catalyst device, the electrode being formed on a base material comprising a ceramics, the electrode comprising: a matrix comprising an Ni—Cr alloy (with a Cr content of 20 to 60 wt. %) or an MCrAlY alloy (M is at least one material selected from Fe, C
1. An electrode for an electrically heating type catalyst device, the electrode being formed on a base material comprising a ceramics, the electrode comprising: a matrix comprising an Ni—Cr alloy (with a Cr content of 20 to 60 wt. %) or an MCrAlY alloy (M is at least one material selected from Fe, Co and Ni); anda disperse phase dispersed in the matrix, the disperse phase comprising an oxide mineral having a laminated structure, whereina ratio of area occupied by the disperse phase in a cross section of the electrode is 40 to 80%. 2. The electrode for an electrically heating type catalyst device according to claim 1, wherein the oxide mineral is at least on of bentonite and mica. 3. The electrode for an electrically heating type catalyst device according to claim 1, wherein the electrode is formed by thermal spraying in a non-oxidative atmosphere. 4. The electrode for an electrically heating type catalyst device according to claim 1, wherein the ceramics contains SiC. 5. An electrically heating type catalyst device comprising: a catalyst support comprising a ceramics, on which a catalyst is supported; anda pair of electrodes formed on the catalyst support, whereinthe electrode comprises: a matrix comprising an Ni—Cr alloy (with a Cr content of 20 to 60 wt. %) or an MCrAlY alloy (M is at least one material selected from Fe, Co and Ni); anda disperse phase dispersed in the matrix, the disperse phase comprising an oxide mineral having a laminated structure, anda ratio of area occupied by the disperse phase in a cross section of the electrode is 40 to 80%. 6. The electrically heating type catalyst device according to claim 5, wherein the oxide mineral is at least one of bentonite and mica. 7. The electrically heating type catalyst device according to claim 5, wherein the electrode is formed by thermal spraying in a non-oxidative atmosphere. 8. The electrically heating type catalyst device according to claim 5, wherein the ceramics contains SiC. 9. A method of manufacturing an electrically heating type catalyst device, comprising: a step of producing a particle of a matrix comprising an Ni-Cr alloy (with a Cr content of 20 to 60 wt.%) or an MCrAIY alloy (M is at least one material selected from Fe, Co and Ni);a step of producing a particle of a disperse phase comprising an oxide mineral having a laminated structure;a step of forming a composite of the particle of the matrix and the particle of disperse phase and thereby producing a particle for thermal spraying; anda step of thermal-spraying the particle for thermal spraying on a catalyst support and thereby forming a pair of electrodes, the catalyst support comprising a ceramics, on which a catalyst is supported, whereina ratio of area occupied by the disperse phase in a cross section of the electrode is 40 to 80%. 10. The method of manufacturing an electrically heating type catalyst device according to Claim 9, wherein the oxide mineral is at least one of bentonite and mica. 11. The method of manufacturing an electrically heating type catalyst device according to Claim 10, wherein in the step of producing a particle of a disperse phase, the produced particle of the disperse phase is sintered. 12. The method of manufacturing an electrically heating type catalyst device according to Claim 11, wherein in the step of producing a particle for thermal spraying, the produced particle for thermal spraying is sintered. 13. The method of manufacturing an electrically heating type catalyst device according to Claim 9, wherein in the step of producing a particle of a matrix, an average particle diameter of the particle of the matrix is 10 to 50 μm. 14. The method of manufacturing an electrically heating type catalyst device according to Claim 9, wherein in the step of forming an electrode, the particle for thermal spraying is thermal sprayed in a non-oxidative atmosphere. 15. The method of manufacturing an electrically heating type catalyst device according to Claim 14, wherein the particle for thermal spraying is plasma sprayed in the non-oxidative atmosphere in which a flame is shielded by an Ar gas. 16. The method of manufacturing an electrically heating type catalyst device according to Claim 14, wherein the particle for thermal spraying is plasma sprayed in the non-oxidative atmosphere that is produced by reducing a pressure. 17. The method of manufacturing an electrically heating type catalyst device according to Claim 14, wherein the particle for thermal spraying is flame sprayed in the non-oxidative atmosphere that is a reduction atmosphere produced by raising an acetylene gas ratio in a mixed gas of oxygen and acetylene. 18. The method of manufacturing an electrically heating type catalyst device according to Claim 9, wherein the ceramics contains SiC.
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