%0 Journal Article
%T Structure Studies of PbBr2-PbF2-P2O5 Glasses<br>PbBr2-PbF2-P2O5玻璃的结构研究
%A ZHAO Hong-Sheng
%A LI Yan-Qing
%A ZHOU Wan-Cheng
%A LUO Fa
%A <br>赵宏生
%A 李艳青
%A 周万城
%A 罗发
%J 无机材料学报
%D 2003
%I Science Press
%X Glasses in the system of PbBr2-PbF2-P205 have low melting temperature, good water durability and good optical properties, which can serve as the host materials of organic-doped scintillator. In the present paper, the structure of PbBr2-PbF2-P205 glasses was characterised by Fourier transfer infrared (FTIR) spectroscopy and X-ray photoelectron spectroscopy (XPS). Results show that lead ions play dual roles, network former and network modifier, in the structure of PbBr2-PbF2-P2O5 glasses. When P2O5 content is 60mol%, most of Pb2+ ions act as network modifier. When P2O5 content decreases to 50mol% and even 40mol%, some Pb2+ ions could enter glass network and form Pb04] tetrahedron or P-O-Pb linkage with decreasing P20s content, while other Pb2+ ions still act as network modifier. The length of phosphate chains decreases with decreasing P2O5 content. Both Br-and F- ions could enter glass network and form PO4-nXn](X=Br or F, n = 0-4) tetrahedron when they reach certain content, breaking P04J tetrahedron and decreasing the length of phosphate chains. The P-O-P linkages content keep unchanged with the same P2O5 content. Decreasing P2O5 content and increasing lead halide content lead to the formation of P-O-Pb linkage through the delocalization of P=O and P-O-bonds.
%K PbBr2-PbF2-P2O5 glasses
%K FTIR
%K XPS
%K structure<br>PbBr2－PbF2－P2O5玻璃
%K 铅卤磷酸盐玻璃
%K 红外光谱
%K X射线光电子能谱
%K 结构研究
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=ABC0063016AF57E1C73EF43C8D2212BD&aid=81518ED39A0BAB9D&yid=D43C4A19B2EE3C0A&vid=13553B2D12F347E8&iid=CA4FD0336C81A37A&sid=DB817633AA4F79B9&eid=27746BCEEE58E9DC&journal_id=1000-324X&journal_name=无机材料学报&referenced_num=3&reference_num=18