應用賽局理論於含有廢棄玻璃之中溫型鑄造耐火材料發展

Abstract

本研究選用三種廢棄玻璃及兩種玻璃配方(G11A5及G17A5)，均為四元BaO-SiO2-B2O3-Al2O3成分)，加入市售鑄造(或稱澆注)耐火材，或是自行組合之澆注絕熱材料，應用於中溫型燃料電池之熱絕緣。研究中使用SEM+EDS、XRD來分析玻璃成份及晶相，以潤濕角測試及流體化床裝置來進行玻璃融化起始點的研究。在耐火材料製備的實驗規劃以K方(光和耐火材料)及T方(台大材料)為參賽者(player)，使用賽局理論，實施一來一往的策略(strategy)及樣品測試，尋求具有最佳性質之耐火澆注料配方。在性質測試中針對其四種性質: 800-1000 oC燒結後收縮率、燒結後三點抗折強度、熱傳導率、耐磨耗率予以改善。性質改善以兩個競爭主體交替提出鑄造熱絕緣之成分修正，進而在此項中溫型耐火材之四種性質上得到回饋(reword)。最後結果顯示，T2-2及T2-3樣品的強度及耐磨耗性質獲得大幅提升，熱處理到1000 o後線性收縮率達2.0 %以內，而800 oC下T2-2含SiC具較高之熱傳導率值0.43±0.05 W/mK，含GW的T2-3樣品為0.28±0.02 W/mK，詳細的性質改善原因在報告中仔細討論。

Three waste glasses and two in-house synthesized glasses, G11 glass and G17 glass (quaternary BaO–SiO2–B2O3–Al2O3 composition) are chosen. Those glasses combine with commercial castable refractory powder to meet the need of the thermos-insulation of intermediate-temperature SOFC. The castables perform appropriate four castable properties, shrinkage of 800-1000oC sintering, three-point bending strength of sintered test bars, thermal conductivity, and abrasion resistance. The game is set by two competitive players, and performs one-on-one strategy based on the game theory. The property performance of T2 samples finally gets improved. Three-point bending strength and erosion resistance of T2-2 and T2-3 samples were greatly improved. The linear change was less than 2.0% after heat treatment to 1000 oC, and thermal conductivity value of T2-2 containing SiC shows a higher value of 0.43±0.05 W/mK at 800 °C, and the value of GW-containing T2-3 sample is 0.28±0.02 W/mK. The reasons of the property improvements are discussed in this work.