Properties and structure of ternary BaO-SnO-P2O5 glasses
Properties and structure of ternary BaO-SnO-P2O5 glasses
复制标题
三元BaO-SnO-P2O5玻璃的性能和结构
DOI：
10.1016/j.jnoncrysol.2022.121909
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发表时间：
2022
影响因子：
3.5
通讯作者：
Hannon A.C.
中科院分区：
文献类型：
--
作者：
Hoppe U.;Saitoh A.;Shimizu T.;Tricot G.;Hannon A.C.
用31 P MAS NMR和中子衍射研究了系列Ba/Sn磷酸盐玻璃（33和40mol%P_2O_5），以阐明Ba取代Sn的效果。结构参数与玻璃性质有关，其中包括光弹性常数（PEC）。与Zn/Sn磷酸盐玻璃（33mol%P2O5）中Sn-O配位数增加到4不同，NSnO = 3.2和3.4并不随Ba取代Sn而改变。Sn或Ba氧多面体的层状实体的堆叠被认为是在12 nm−1处产生第一散射峰的原因。两个或多个Ba 2+共享的非桥氧导致随着BaO含量的增加而伴随着Tg增加、热膨胀降低和更好的耐腐蚀性的刚性网络。Ba/Sn玻璃的PEC的组成依赖性的斜率小于Zn/Sn玻璃的报告，其对应于constantNSnOs。
Series of Ba/Sn phosphate glasses (33 and 40 mol% P2O5) are investigated by31P MAS NMR and neutron diffraction to clarify the effects of substituting Sn with Ba. The structural parameters are related to glass properties, among them to the photoelastic constant (PEC). Different from the increase of the Sn−O coordination number to four in Zn/Sn phosphate glasses (33 mol% P2O5) theNSnOs of 3.2 and 3.4 do not change with substituting Sn with Ba. The stacking of layer-like entities of Sn or Ba oxygen polyhedra is suggested to cause the first scattering peak at 12 nm−1. Non-bridging oxygens shared by two or more Ba2+lead to stiff networks with increasing BaO content which is accompanied with increasingTg, decreasing thermal expansion, and better corrosion resistance. The slopes of the compositional dependence of the PEC of the Ba/Sn glasses are smaller than reported for Zn/Sn glasses which corresponds to the constantNSnOs.