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Spectroscopical Study on Net Work Modifier in Oxide Glasses

氧化物玻璃网络功改性剂的光谱研究

基本信息

批准号：
05650021
负责人：
TSUNAWAKI Yoshiaki
金额：
$ 1.34万
依托单位：
OSAKA SANGYO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1994
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05650021/
关键词：
alkaline silicate glasses network modifier infrared absorption Raman spectroscopy X-ray diffraction XAFS phosphate X線回折

项目摘要

Oxide glasses consist of network former (NWM) and network modifier (NWM). The representative NWMs are alkaline ions such as Li^+ and K^+, and contribute to the transport phenomena in glasses. In this work, the structural study of NWMs in oxide glasses has been systematically made by means of various kinds of spectroscopical techniques such as Raman Scattering, mid-and far-infrared absorption, Brillouin scattering, X-ray diffraction, soft X-ray XAFS ans so on.At first time, our X-ray diffraction spectrometer was inproved to measure both glasses and the melts. The alkaline glasses have been mainly studied by Raman spectroscopy, X-ray diffraction, and XAFS together with molecular dynamics calculation.After that the study on PbO-SiO_2 : glasses was added because of the wide content of NWM in silicate network. Moreover, the crystalization process of AlPO_4 and KNa_<2x>Zr_<2-x>Mg_x (PO_4) _3 have been investigated in order to elucidate the basic structure of phosphate glasses. Unfortunately we did not continue the sufficient work on the corresponding glasses because of that terrible Hanshin earthquake.The following results were obtained from above experiments. Each key band for each glass in the far-infrared region was found due to the weak linkage between NWM and non-bridged oxygen. It was seen that the behavior of NWM as a basic ion in the glasses was about 1-3% different from that in the melts, and K^+ and Li^+ ions as NWM were surrounded by 4-5 and 1-2 oxygen ions in K_2O-SiO_2 and Li_2O-SiO_2 glasses, respectively. On the phosphate we could find the possibility of the content measurement of H_2O which gives the important contribution to the crystalizing process. We, furtheremore, could develop the method to get various kind of pure crystalline alminum phosphate.

氧化玻璃由成网剂（NWM）和网络改性剂（NWM）组成。具有代表性的NWMs是碱性离子，如Li^+和K^+，它们有助于玻璃中的输运现象。本文采用拉曼散射、中远红外吸收、布里渊散射、x射线衍射、软x射线XAFS等多种光谱技术，系统地研究了氧化玻璃中NWMs的结构。首先，我们改进了x射线衍射光谱仪，可以同时测量玻璃和熔体。本文主要通过拉曼光谱、x射线衍射、XAFS以及分子动力学计算对碱性玻璃进行了研究。之后，由于硅酸盐网络中NWM的广泛含量，又增加了PbO-SiO_2玻璃的研究。为了阐明磷酸盐玻璃的基本结构，研究了AlPO_4和KNa_<2x>Zr_<2-x>Mg_x (PO_4) _3的结晶过程。不幸的是，由于阪神大地震，我们没有继续进行相应的眼镜的充分工作。从上述实验中得到以下结果：由于NWM和非桥氧之间的弱联系，每个玻璃在远红外区域都发现了每个关键波段。结果表明，NWM作为碱性离子在K_2O-SiO_2和Li_2O-SiO_2玻璃中的行为与在熔体中的行为差异约为1-3%，作为NWM的K^+和Li^+离子分别被4-5和1-2个氧离子包围。在磷酸盐上发现了测量H_2O含量的可能性，这对结晶过程有重要的贡献。此外，我们还可以开发出制备各种纯结晶磷酸铝的方法。