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    • 2. 发明专利
    • BR7301420D0
    • 1974-06-27
    • BR142073
    • 1973-02-26
    • BOSCH GMBH ROBERT
    • FRIESE KKNAPP HKRAUS FJAGGLE GSTUMPP GSTEINER JKNAPP J
    • F02D35/00F02B77/08F02D1/08F02M51/02F02M53/06G01N20060101G01N27/28G01N27/407G01N27/409
    • 1403685 Electro-chemical analysis ROBERT BOSCH GmbH 9 March 1973 [10 March 1972] 11463/73 Heading G1N A solid electrolyte oxygen sensor for monitoring the oxygen content of exhaust gases is constructed so that it can be easily exchanged. A stabilized cubic zirconium oxide tube 10 provided at one end with a shoulder 11 has a platinum layer 12 on its outer surface and a platinum conductor 13 on its inner surface. The tube 10 is mounted by means of its shoulder 11 in a steel holder 14 of complementary configuration provided with screw thread 15 for screwing into an exhaust pipe. An electrically conductive melt 16 located between shoulder 11 and holder 14 seals the tube 10 into the holder 14 and also serves to provide an electrical contact between platinum layer 12 and holder 14. A similar electrically conductive melt 16 also fixes and provides an electrical contact between contact tag 18 and inner electrode 13, tag 18 being provided with a bore 20 to permit entrance of a reference, air, gas to tube 10. A porous coating 21 of lanthanum cobalt oxide is provided to protect platinum layer 12. Compositions of the electrically conductive material 16 are described together with methods of construction.