The processing of sintered ceramics is often conditioned by the debinding step. The binders may determine some defects in the final product directly, by causing some gas evolution even at an advanced state of densification, due to incomplete decomposition at low temperature, or indirectly, by offering poor adhesion between particles, so that ‘green’ compacts may be easily damaged. The present investigation is aimed at exploring a novel concept for sintered glass-ceramics, based on the adoption of a silicone polymer as reacting binder, providing an abundant ceramic residue after firing. A glass belonging to the CaO-MgO-Al₂O₃-SiO₂ system, already studied as a sealant in solid oxide fuel cell (SOFC) planar stack design, was reproduced in form of ‘silica-defective’ variants, featuring a SiO₂ content, in the overall formulation, reduced up to 15 wt%. The overall silica content was recovered by mixing powders of the new glasses with the silicone: upon firing in air, the interaction between glass powders and polymer-derived silica led to glass-ceramics with the same phase assemblage than that formed by the reference glass and with a CTE of 9.5 × 10⁻⁶ K^-1. The new approach has been successfully applied to the manufacturing of glass-ceramic seals as joining materials for solid oxide cells.

烧结陶瓷的加工通常通过脱脂步骤进行调节。粘合剂可能会直接确定最终产品中的某些缺陷，这是由于在低温下不完全分解所致，甚至在致密化的高级状态下也会引起一些气体逸出，或者间接地由于颗粒之间的粘合力差而间接地产生，因此“绿色”压块可能会容易损坏。本研究旨在探索一种烧结玻璃陶瓷的新概念，其基础是采用有机硅聚合物作为反应性粘合剂，在烧制后可提供丰富的陶瓷残留物。属于CaO-MgO-Al ₂ O ₃ -SiO _2的玻璃该系统已经作为固体氧化物燃料电池（SOFC）平面堆栈设计中的密封剂进行了研究，以“二氧化硅缺陷”变体的形式复制，在整个配方中，其SiO ₂含量降低了15 wt％。通过将新玻璃的粉末与有机硅混合来回收总的二氧化硅含量：在空气中焙烧时，玻璃粉末与聚合物衍生的二氧化硅之间的相互作用导致玻璃陶瓷的相组装与参考玻璃和陶瓷的相组装相同。 CTE为9.5×10 ^-6 K ^-1。新方法已成功应用于玻璃-陶瓷密封件的制造，作为固体氧化物电池的连接材料。