本研究主要探討硼矽玻璃(BSG)+氧化鋁(Al2O3)系統中，添加不同含量、不同顆粒大小的Al2O3粉末，以及在不同溫度下對系統自由燒結時黏性行為的影響；此外，亦探討顯微結構的非等向性對此系統黏性行為的改變。
利用黏彈性模型(visco-elastic model)結合構成方程式(constitutive equations)計算出系統在各條件的單軸向黏度(uniaxial viscosity)。單軸向黏度隨著密度的增加而上升，而溫度越高，系統的單軸向黏度則越低；此外，在相同密度下，隨著氧化鋁含量的增加以及氧化鋁顆粒大小的減少，會造成單軸向黏度的上升。此系統的活化能約為225kJ/mol。
在顯微結構的非等向性的部分，在試片燒結時，藉由施加單軸向壓應力使其顯微結構產生變化，並量化分析Al2O3顆粒及孔洞的方向性。隨著試片施壓的相對密度區間增加以及施加的壓力越大，Al2O3顆粒會趨向於與施壓方向垂直，造成材料於施壓方向的單軸向黏度增加。此外，亦發現不同的氧化鋁含量對非等向性程度的影響不明顯。

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