本研究以2205雙相不銹鋼(2205DSS)為底材，並披覆La0.7Sr0.3 MnO3 (2205-LSM)，以及在披覆La0.7Sr0.3 MnO3之前，於底材表面預先分別濺鍍2、3、4、5µm的Ag層、網印Ag層與AgPd層，再經1100°C氮氣氣氛高溫燒結後，探討2205-LSM於800°C的高溫氧化行為及Ag於高溫電性的作用。實驗結果顯示，2205-LSM於800 °C氧化1000小時後，合金底材與LSM界面形成的氧化物厚度相較於未氧化的2205-LSM之氧化層增長1.56 ± 0.05µm。但在500 ~ 750°C的ASR(Area specific resistance)，卻僅增加0.16 ~ 0.003 Ωcm2，其原因是Cr-Mn spinel比例提高或二價金屬離子摻雜Cr2O3，提升了氧化層的導電性。在500 ~ 750°C的電性量測，含中間貴金屬層的2205- LSM之ASR均隨溫度提昇而下降，且其值也均低於2205-LSM的ASR，尤其在低溫的效果相較於高溫更為明顯。主要的代表是貴金屬提供較佳電子傳導路徑(Current collection)方式，增加電荷轉移效率，另為低價金屬離子摻雜氧化物與LSM層，提昇整體導電性所致。使用濺鍍方式披覆不同Ag層厚度的2205-LSM，在500°C測得的ASR均低於2205-LSM在750°C的ASR，2205 DSS/Ag/LSM用以作為金屬雙極板的材料，將可降低固態氧化物燃料電池(SOFC)操作溫度。

This researches is focus on the behavior and characteristic of oxidation for 2205-LSM at 800 °C and influence on electrical performance at high temperature for silver layer. LSM, Ag-LSM and Ag-Pd-LSM coated on 2205DSS by screen print and sputter was sintered at 1100°C under nitrogen atmosphere for 30 to 90 minutes. As the result, after oxidation at 800 °C for 1000 hours the oxide layer was form at the interface between LSM and 2205DSS. An increase on thickness of oxide layer was observed about 1.56 ± 0.05 µm but there were a small different on resistance measurements about 0.16 to 0.003 Ωcm2 as compared with un-oxidation. During long-term oxidation, formation of Cr-Mn spinel derived from reaction of Cr2O3 form 2205DSS and LSM was increased. Formation Cr-Mn spinel would reduce resistance due to its better conductivity.
On resistance measurements at temperature range of 500 to 750 °C, ASR (area specific resistance) for noble metal-LSM coated 2205DSS was decrease with increase of temperature. ASR of the specimens was less than for LSM coated 2205DSS, especially at lower temperature because of noble metal acted as a current collector to provide better pathway for conduction of electron, and low valence cation was diffused to LSM and oxide layer.
The different thickness of Silver layer was coated on 2205-LSM by sputter. According the result, ASR for Ag-LSM coated 2205DSS at 500°C was less than for LSM coated 2205DSS at 750°C. This demonstrated that metallic interconnect prepared with Ag-LSM coated 2205DSS could lower working temperature for SOFC.

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