Effect of bismuth oxide on crystallization and sealing behavior of barium borosilicate glass sealant for SOFCs

Review on silicate and borosilicate‐based glass sealants and their interaction with components of solid oxide fuel cell

“…Many researchers 66,76,99,132–154 have targeted their search of the sealing material on the barium aluminosilicate glass system and its derivatives. Eichler et al 132 characterized the crystallization properties of commercially available barium alumina‐silicate (BAS) (BaO.…”

“…However, the use of some coating like MnCo interconnect materials can be avoided or minimized 155 . Ayawanna et al 146 studied BaO‐B 2 O 3 ‐SiO 2 glass with the modifications of Bi 2 O 3 . The CTE of the glass is 11 × 10 −6 °C −1 , which was in agreement with interconnect Crofer22 APU.…”

“…However, the use of some coating like Mn Co interconnect materials can be avoided or minimized. 155 Ayawanna et al 146 and barium borate (Ba 2 B 2 O 6 ) phases. These crystalline phases are hampered by Bi 2 O 3 .…”

Effect of properties and crystallization behavior of BaO–ZnO–B2O3–SiO2 glass on the electrical conductivity of Cu paste

“…Nevertheless, the low coefficient of thermal expansion (CTE) of glass was mismatched with the CTE of copper powder, which was sensitive to crack during the sintering process 13,14 . An alternative glass system of BaO–B 2 O 3 –SiO 2 has been proposed in previous studies, which was provided a close CTE to the substrate material and low T g , but if the content of BaO was high enough that would lead to phase separation and poor chemical stability 15,16 . An optimized ZBS glass frit composition should meet requirements of not only high CTE, low T g , and good wettability for terminal electrode paste, but also electrical conductivity and acid resistance during copper electroplating processes that was implemented next to the terminal electrode built up.…”

“…13,14 An alternative glass system of BaO-B 2 O 3 -SiO 2 has been proposed in previous studies, which was provided a close CTE to the substrate material and low T g , but if the content of BaO was high enough that would lead to phase separation and poor chemical stability. 15,16 An optimized ZBS glass frit composition should meet requirements of not only high CTE, low T g , and good wettability for terminal electrode paste, but also electrical conductivity and acid resistance during copper electroplating processes that was implemented next to the terminal electrode built up. In this paper, the ZnO-B 2 O 3 -SiO 2 glass system is further modified by the introduction of BaO, to obtain superior glass frit equipped with low sintering temperature, good wetting performance, matchable CTE, excellent electrical conductivity, and acid resistance across the whole copper terminal electrode fabrication.…”