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    • 1. 发明申请
    • Gas sensor having a laminate comprising solid electrolyte layers and alumina substrate
    • 气体传感器具有包括固体电解质层和氧化铝基底的层压体
    • US20040084309A1
    • 2004-05-06
    • US10338740
    • 2003-01-09
    • NGK SPARK PLUG CO., LTD.
    • Masashi AndoTakao KojimaShigeki Mori
    • G01N027/26
    • C04B35/486B32B18/00C04B35/111C04B35/4885C04B2235/3206C04B2235/3208C04B2235/3225C04B2235/3246C04B2235/3418C04B2235/762C04B2235/765C04B2237/343C04B2237/348C04B2237/62C04B2237/68G01N27/4071
    • A gas sensor (1a) having a laminate including an alumina substrate (11) having a heating resister (115) embedded in the alumina substrate (11); a first oxygen-ion conductive solid electrolyte layer (131) containing zirconia and alumina and partly constituting an oxygen-detecting cell (13) and the first solid electrolyte layer (131) being laminated with said alumina substrate (11); a second oxygen-ion conductive solid electrolyte layer (121) containing zirconia and alumina and partly constituting an oxygen-pumping cell (12); an ion-leakage preventing ceramic spacer (143) for preventing oxygen-ions from leaking from the second oxygen-ion conductive solid electrolyte layer (121) to the first oxygen-ion conductive solid electrolyte layer (131), the spacer (143) being laminated between the first and second oxygen-ion conductive solid electrolyte layers (131, 121); and a gas-diffusion space (141) formed between an electrode (133) of the oxygen-detecting cell (13) and an electrodes (126) of the oxygen-pumping cell (12). Furthermore, the laminate (1a) is co-fired. Preferably, the zirconia contained at least in the second solid electrolyte layer is made of partially stabilized zirconia, the phase formed in the zirconia consisting essentially of tetragonal and cubic phases. Additionally, an ionic migration-preventing electrode (117) is optionally embedded in the alumina substrate (11) for preventing metal ion migration.
    • 一种气体传感器(1a),其具有包含氧化铝基板(11)的层叠体,所述氧化铝基板(11)具有嵌入在所述氧化铝基板(11)中的加热电阻(115)。 含有氧化锆和氧化铝的第一氧离子导电固体电解质层(131)和部分构成氧检测电池(13)的第一固体电解质层(131)和与所述氧化铝基底(11)层压的第一固体电解质层(131)。 含有氧化锆和氧化铝的第二氧离子导电固体电解质层(121),并且部分构成氧气抽吸电池(12); 用于防止氧离子从第二氧离子导电固体电解质层(121)泄漏到第一氧离子导电固体电解质层(131)的防离子泄漏陶瓷间隔物(143),间隔物(143)是 层压在第一和第二氧离子导电固体电解质层(131,121)之间; 以及形成在氧检测单元(13)的电极(133)和氧抽吸单元(12)的电极(126)之间的气体扩散空间(141)。 此外,层压体(1a)共烧。 优选地,至少在第二固体电解质层中包含的氧化锆由部分稳定的氧化锆制成,氧化锆中形成的相基本上由四方晶相和立方相组成。 另外,离子迁移防止电极(117)任选地嵌入在氧化铝基板(11)中,以防止金属离子迁移。