Progress on Bismuthate Sealing Glass Research and Its Joining Application

Lead-free low-temperature sealing glass is widely used in aerospace, electric vacuum, integrated circuits and other fields due to its advantages of green safety, low cost and low sealing temperature. In phosphate, vanadate, borate and bismuthate and other sealing glass systems, because bismuth and lead have similar properties, bismuthate glass has become the green glass filler metal that is most likely to replace lead-acid glass. The research status of composition, property regulation and network structure of bismuthate glass is reviewed, and the research progress on homogeneous/heterogeneous materials between metal and ceramics using bismuthate sealing glass is introduced. Finally, the future development trend is prospected.