- 學位論文
無鉛玻璃與Kovar合金界面接合特性之研究
Study on the Interface Bonding Characteristics of Lead-Free Glass and Kovar Alloy
摘要
本研究主要探討SiO2-B2O3-Na2O-Al2O3系統玻璃添加Bi2O3元素對Kovar合金接合性質之研究。實驗首先以最佳的SiO2-B2O3-Na2O-Al2O3四元系統玻璃組成，然後添加不同含量Bi2O3元素，再將所得之玻璃利用熱膨脹分析儀討論其軟化點溫度是否產生改變，並以X光繞射儀確認玻璃的結晶性。實驗中發現Kovar合金與玻璃最適合密封之預氧化層厚度參數為加熱溫度700℃，持溫10分鐘的操作程序，因此將最佳預氧化的Kovar合金與玻璃粉末一併放入預先升溫之980℃熱處理爐中，持溫10分鐘並各別通以氬氣或氮氣保護氣氛來進行接合試驗。最後以能量散射光譜儀確認玻璃與金屬間有無產生原子擴散以達到化學鍵結；並利用剪應力試驗來評估其機械性質。 實驗結果顯示，在SiO2-B2O3-Na2O-Al2O3四元系統玻璃中添加Bi2O3元素不會使玻璃產生結晶，同時以能量散射光譜儀析玻璃與金屬接合處，有微量原子擴散而強化了界面接合之效果。此外，本四元系統玻璃隨著Bi2O3元素添加量增加，將可顯著改善其潤濕性、抗水解能力、Tm點溫度及拉剪強度。
並列摘要
This study evaluated the effect of interfacial bonding on the quaternary SiO2-B2O3-Na2O-Al2O3 glasses doped with Bi2O3 element joined to the Kovar alloy. The best quaternary composition SiO2-B2O3-Na2O-Al2O3 glasses were selected to dope for Bi2O3, and the thermal expansion characteristics of the glasses and their crystallization behaviors were also investigated. From the experiment results, the best preoxidation treatment for the Kovar alloy was heating to 700℃ and maintaining for 10 minutes. The joining between the preoxidized Kovar alloy and the glasses were performed by heating up to 980℃ for 10 minutes in a controlled atmosphere (nitrogen, argon) furnace. Energy dispersive X-ray analysis was used to obtain the concentration profiles of the elements present in the interfacial zone meanwhile could confirm atomic diffusion from the metal to the glass whether achieved a good chemical bonding. The shear test was used to evaluate the mechanical property of the single lap joint. The results indicated that even when a glass in the SiO2-B2O3-Na2O-Al2O3 quaternary system doped with Bi2O3 element and show no tendency to crystallize. The addition of small amounts of Bi2O¬3 in SiO2-B2O3-Na2O-Al2O3 glasses significantly improved the wetting property, anti-hydrolysis ability, melting temperature and joints shear strength.