TY - JOUR
T1 - Microstructure evolution during air bonding of Al2O3 to Al2O3 joints using bismuth–borate–zinc glass
AU - Guo, Wei
AU - Lin, Tiesong
AU - Wang, Tong
AU - He, Peng
AU - Sekulic, D. P.
AU - Guo, Shu
N1 - Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2017/10
Y1 - 2017/10
N2 - Alumina ceramics with 95 wt.% purity were sealed together using a bismuth based glass, 40Bi2O3–40B2O3–20ZnO (mol.%). The wettability of the glass on the Al2O3 substrate was investigated. The results showed a contact angle of ≤36.5° was achieved when the temperature was ≥630 °C. Subsequently, sealing cycles were performed at temperatures of 520–700 °C for 30 min. The dependence of microstructure evolution of the joints on temperature was investigated. Bi24B2O39 was detected to be the product in the joints sealed at 530–580 °C, while ZnAl2O4 was identified to be the main product when sealing at temperature of ≥650 °C due to the reaction between the Al2O3 substrate and ZnO from the glass. The influence of dwelling time at 700 °C on microstructure evolution of the joints was also studied. The results showed that the size of ZnAl2O4 increased with increasing holding time.
AB - Alumina ceramics with 95 wt.% purity were sealed together using a bismuth based glass, 40Bi2O3–40B2O3–20ZnO (mol.%). The wettability of the glass on the Al2O3 substrate was investigated. The results showed a contact angle of ≤36.5° was achieved when the temperature was ≥630 °C. Subsequently, sealing cycles were performed at temperatures of 520–700 °C for 30 min. The dependence of microstructure evolution of the joints on temperature was investigated. Bi24B2O39 was detected to be the product in the joints sealed at 530–580 °C, while ZnAl2O4 was identified to be the main product when sealing at temperature of ≥650 °C due to the reaction between the Al2O3 substrate and ZnO from the glass. The influence of dwelling time at 700 °C on microstructure evolution of the joints was also studied. The results showed that the size of ZnAl2O4 increased with increasing holding time.
KW - AlO
KW - BiBO
KW - Bismuth-borate-zinc glass
KW - Sealing
KW - ZnAlO
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U2 - 10.1016/j.jeurceramsoc.2017.04.002
DO - 10.1016/j.jeurceramsoc.2017.04.002
M3 - Article
AN - SCOPUS:85018396725
SN - 0955-2219
VL - 37
SP - 4015
EP - 4023
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 13
ER -