| 摘要 |
The present invention is a glass-ceramic material and method of making usefu l for joining a solid ceramic component and at least one other solid component . The material is a blend of M1-M2-M3-M4, wherein M1 is BaO, SrO, CaO, MgO, or combinations thereof, M2 is Al2O3, present in the blend in an amount from 2 to 15 mol%, M3 is SiO2 with up to 50 mol% B203 and a metal oxide selected from the group of La2O3, Y2O3, Nd2O3 or combinations thereof, or between 0.1 and 7.5 mol% K2O. In the case of a metal oxide from the group La2O3, Y2O3, Nd2O3 or combinations thereof, it is preferred that the composition contain an additional 0.1 to 3 mol %CuO. In all cases, the glass ceramic material in a crystalline phase substantially matches a coefficient of thermal expansion o f solid electrolytes having a thermal expansion coefficient of 12 x 10-6 ~C-1 as measured from 25 ~C to 1000 ~C, and does not degrade with repeated heat cycling. According to the present invention, the series of glass ceramics in the M1-Al2O3-M3-M4 system can be used to join or seal both tubular and plana r solid oxide fuel cells, oxygen electrolyzers, and membrane reactors for the production of syngas, commodity chemicals and other products. |
