当前位置: X-MOL 学术J. Non-Cryst. Solids › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Quantification of phosphorus structures in CaO–SiO2–P2O5 glasses via Raman spectroscopy
Journal of Non-Crystalline Solids ( IF 3.2 ) Pub Date : 2020-12-02 , DOI: 10.1016/j.jnoncrysol.2020.120579
Chengjun Liu , Rui Zhang , Xuan Zhao , Jixiang Jia , Yi Min

The phosphorus structures in CaO–SiO2–P2O5 glasses were analyzed by Raman spectroscopy and integral Raman intensities of [PO4]-tetrahedrons were calibrated by 31P MAS-NMR spectroscopy. Spectral results showed the presence of Q0(P) and Q1(P), and calculated values of Raman scattering coefficients of Q0(P), Q1(P) units were 1 and 0.576, respectively. Good agreement between experimental and theoretical values of non-bridging oxygen number per coordinated atom indicated the reliability of evaluating Raman scattering coefficients of Qn(P). Quantitative Raman analysis indicated that CaO exerted stronger ability to depolymerize [PO4]-tetrahedrons rather than [SiO4]-tetrahedrons with increasing basicity under the condition of higher degree of polymerization. P2O5 added to silicate melt could cause an increase in amount of Q2(Si), Q3(Si) and Q4(Si) units due to stronger stability of P–O–Ca linkages than that of Si–O–Ca linkages. Moreover, P5+ ions could be partly replaced with Si4+, forming Q1(Si+P) and Q2(Si+P) units.



中文翻译:

用拉曼光谱法定量CaO-SiO 2 -P 2 O 5玻璃中的磷结构

通过拉曼光谱分析CaO-SiO 2 -P 2 O 5玻璃中的磷结构,并通过31 P MAS-NMR光谱校正[PO 4 ]-四面体的积分拉曼强度。光谱结果表明存在Q 0(P)和Q 1(P),并且计算的Q 0(P),Q 1(P)单位的拉曼散射系数分别为1和0.576。每个配位原子的非桥接氧数的实验值与理论值之间的一致性很好,表明评估Q n拉曼散射系数的可靠性(P)。拉曼定量分析表明,在较高聚合度的条件下,随着碱度的增加,CaO可以使[PO 4 ]-四面体的解聚能力强于[SiO 4 ]-四面体。由于P–O–Ca键的稳定性比Si–O更强,因此添加到硅酸盐熔体中的P 2 O 5可能导致Q 2(Si),Q 3(Si)和Q 4(Si)单元数量增加。–Ca链接。此外,P 5+离子可以部分被Si 4+取代,形成Q 1(Si + P)和Q 2(Si + P)单元。

更新日期:2020-12-02
down
wechat
bug