BaO-Al2O3-B2O3系密封玻璃的结构与性质

Structure and Properties of BaO-Al_2O_3-B_2O_3 Glass Sealants

固体氧化物燃料电池（Solid Oxide Fuel Cell SOFC）具有能量转化效率高（能量利用率可达60%～80%）,不采用贵金属作催化剂,可使用多种燃料,对环境友好,可实现长寿命运行等优点,受到广泛关注。平板式固体氧化物燃料电池（planar SOFC pSOFC）以其高功率密度、低生产成本等优点，

The BaO-Al2O3-B2O3 glasses manufactured of different nBaO/nB2O3 on crystal, thermal properties, for solid oxide fuel density and infrared cell（SOFC） sealing were studied. The effect spectra of this system has been discussed. The results show that the trends of crystallization, glass transformation temperature, dilatometric softening temperature and density increase with nBaO/nB2O3 values. But a typical property deviation occurs when nBaO/nB2O3 is 0.875, and its coefficient of thermal expansion has the maximum at this point. The changes of properties can attribute to the conversion of boron from tetrahedral coordination to trigonal, breakage of the local glass network and interaction between the network modifiers. These can be proved by infrared studied samples ate suitable for the sealing of SOFC using Sm doped spectra of glasses ceria electrolyte and Thermal properties of some operating at 400-600℃.