Effects of nickel on network structure and thermal properties of a new solid oxide cell seal glass
Effects of nickel on network structure and thermal properties of a new solid oxide cell seal glass
复制标题
DOI：
10.1016/j.jpowsour.2008.09.006
复制
发表时间：
2008-12
影响因子：
9.2
通讯作者：
M. Mahapatra;K. Lu
中科院分区：
文献类型：
--
作者：
M. Mahapatra;K. Lu
成功的密封设计依赖于对玻璃网络结构及其对玻璃热物理性能的相应影响的良好理解。研究了Ni替代玻璃形成体SiO2和B2O3以及玻璃改性剂SrO对SrOLa2O3Al2O3B2O3SiO2玻璃网络结构和热性能的影响。利用拉曼光谱研究了玻璃结构的局域有序性。制定玻璃网络连接，以比较不同组成的玻璃结构演变与镍添加。玻璃化转变温度和软化温度由折光仪测定。用X射线衍射研究了玻璃的热稳定性。镍在所研究的玻璃体系中作为玻璃改性剂，并降低玻璃网络连接性。然而，镍可以增加或降低玻璃化转变温度和硬度计软化温度，这取决于具体的组成。总体而言，镍添加通过增加非桥接氧原子和失透的量来降低玻璃热稳定性。
Successful seal design relies on good understanding of glass network structure and the corresponding impact on glass thermophysical properties. This study is focused on effects of nickel replacement of glass formers SiO2and B2O3and glass modifier SrO on SrOLa2O3Al2O3B2O3SiO2glass network structure and thermal properties. Glass structure local ordering was studied by Raman spectroscopy. Glass network connectivity was formulated to compare glass structure evolution with nickel addition for different compositions. Glass transition temperature and dilatometric softening temperature were evaluated by dilatometry. Glass thermal stability was studied by X-ray diffraction. Nickel behaves as a glass modifier in the studied glass system and decreases glass network connectivity. However, nickel can increase or decrease glass transition temperature and dilatometric softening temperature depending on the specific composition. Overall, nickel addition degrades glass thermal stability by increasing the amount of non-bridging oxygen atoms and devitrification.