固態氧化物燃料電池封裝之研究

Glass-Ceramic Sealing Materials for Solid Oxide Fuel Cells

莊青錦(Ching-Chin Chuang)

指導教授 ： 王玉瑞

國立臺北科技大學/工程學院/材料科學與工程研究所/碩士(2008年)

摘要

本研究應用Si-Al-B-Ba玻璃系統，將玻璃及陶瓷粉末複合，製造適用於固態氧化物燃料電池(SOFC)的封裝材料，利用玻璃在高溫中的黏性流動特性，可以填補燃料電池元件間的縫隙，複合陶瓷粉末目的為調整流動特性，並改變複合材料的膨脹係數使其匹配燃料電池的元件，減低電池在操作循環過程中，所產生熱脹冷縮造成的應力破壞。
軟化點為玻璃的屈服溫度，為研究封裝材料的重要參考依據，在本實驗之軟化點量測結果發現，在Si-Al-B-Ba玻璃系統中，BaO/SiO2或是B2O3/SiO2愈大，所得到玻璃軟化點愈低，降低軟化點可使封裝溫度降低，在較低的溫度即產生密封的效果，在本實驗配方中軟化點最低為編號L06玻璃653°C。在膨脹係數調整測試中，發現MgO的含量可以調整P00M系列玻璃-陶瓷複合材料的膨脹係數在10~13ppm/°C之間，但玻璃-陶瓷的比例會影響最終的封裝效果，我們利用自行組裝的壓力測漏設備量測結果發現L06MgO 20vol%、L08MgO 30vol%、L09MgO 40vol%皆表現出良好的封裝效果，其漏氣率皆低於量測系統之測試極限，為每分鐘0.053 sccm/cm kg/cm2以下，且漏氣率隨著MgO的含量增加而提高。

關鍵字

固態氧化物燃料電池 ； 玻璃陶瓷 ； 封裝

並列摘要

Barium borosilicate glass composite with ceramic powder sealants for solid oxide fuel cells (SOFC) were fabricated via powder process. Glass softening temperature was measured by Orton SP-3A. Thermal expansion coefficient (TEC) was measured by NETZSCH DIL 402C dilatometer, and leak rate of sealants performance was carried out by self-made leak rate tester. The glass softening temperature would be an important data that determine sealants property. When we increase BaO/SiO2 or B2O3/SiO2 ratio，and the softening temperature decreases. The glass sample with formula L06 was showed low softening temperature (653°C). We found that MgO powder can increase TEC of P00M series about 10~13 ppm/°C, but more MgO powder leads to more leak rate. The self-made leakage rate measurement shows that sealants L06MgO 20vol%, L08MgO 30vol%, L09MgO 40vol% have less than the testing limit value of 0.053 sccm/cm kg/cm2 per minute. And the leak rate increases with MgO increase.

並列關鍵字

SOFC ； Solid Oxide Fuel Cells ； Seals ； Glass-Ceramic

參考文獻

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