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首页> 外文会议>International Conference on Advanced Ceramics and Composites >CHARACTERIZATION AND PERFORMANCE OF A HIGH-TEMPERATURE GLASS SEALANT FOR SOLID OXIDE FUEL CELL
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CHARACTERIZATION AND PERFORMANCE OF A HIGH-TEMPERATURE GLASS SEALANT FOR SOLID OXIDE FUEL CELL

机译：固体氧化物燃料电池高温玻璃密封剂的表征与性能

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摘要

The crystalline properties and thermal stabilities of a novel borosilicate glass (GC9) developed at INER, have been investigated for use as high-temperature seals in solid oxide fuel cells (SOFCs). The kinetics of isothermal and non-isothermal crystallization of the GC9 glass were examined by TG/DTA and XRD at various crystallization temperatures of 700~900°C and heating rates of 2.5~50°C /min, respectively. A sandwich specimen of metallic interconnect and MEA joined by the GC9 glass was aged at 800°C for 1,000 hours to examine the compatibility and interfacial stability. High-temperature leak rate measurements of the GC9 glass were performed under the condition of aging (800°C ) and thermal cycling (RT~800°C ). The glass transition temperature, softening temperature, and coefficient of thermal expansion of the GC9 glass are 652°C , 745°C , and 12.5 ppm/°C , respectively. In the study, there was about 50% of fine ceramic phases, mainly Ba_3La_6(SiO_4)_6, embedded in the GC9 glass matrix and thus resulted in a superior mechanical strength at elevated temperatures. No obvious interfacial interaction or diffusion between the GC9 seals and the adjacent plates was found after long-term aging. Additionally, the average leakage rates were 2.25×10~(-5) and 5.58×10~(-5) mbar-1/s/cm corresponding to the aging and thermal cycling tests.
机译：已经研究了在INER的新型硼硅酸盐玻璃（GC9）的结晶性能和热稳定性，以用作固体氧化物燃料电池（SOFC）中的高温密封。通过TG / DTA和XRD在700〜900℃的各种结晶温度下进行Tg / DTA和XRD的等温和非等温结晶的动力学，分别为2.5〜50℃/ min的加热速率。通过GC9玻璃加入的金属互连和MEA的夹层标本在800℃下老化1,000小时，以检查相容性和界面稳定性。在老化（800℃）和热循环（RT〜800℃）的情况下进行GC9玻璃的高温泄漏速率测量。 GC9玻璃的玻璃化转变温度，软化温度和热膨胀系数分别为652℃，745℃和12.5ppm /°C。在该研究中，有大约50％的细陶瓷相，主要是在GC9玻璃基质中嵌入的Ba_3La_6（SiO_4）_6，因此在升高的温度下导致优异的机械强度。长期老化后，GC9密封件和相邻板之间没有明显的界面相互作用或扩散。此外，平均泄漏速率为2.25×10〜（-5）和5.58×10〜（-5）mbar-1 / s / cm对应于老化和热循环试验。

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