直流电场诱导下TeO_2-Nb_2O_5-BaO-AgCl系统玻璃的纳米晶析出研究

Study on Growth of Nano-Crystal in TeO_2-Nb_2O_5-BaO-AgCl Glasses under Controlled by DC Electric Field

非线性光学玻璃材料在光电领域中具有广泛的应用前景,而纳米晶掺杂的非线性光学玻璃材料因其较高的三阶非线性效应已成为目前研究的热点。本文主要研究了直流电场诱导下TeO_2-Nb_2O_5-BaO-AgCl系统玻璃的纳米晶析出研究。研究结果表明,因BaO对铌碲酸盐玻璃系统链状网络结构的完善作用,能够较好地抑制TeO2、铌碲酸盐等与玻璃基体相关晶体的析出,使得TeO_2-Nb_2O_5-BaO-AgCl系统玻璃在适当的热处理条件下能够析出单一完整的AgCl晶体。同时,外加辅助电场能够促进铌碲酸盐系统玻璃的成核和晶化,并且能够较好地控制纳米晶体的析出,为今后制备高性能的纳米晶掺杂铌碲酸盐玻璃打下了良好的基础。

Nonlinear optic glasses have a big potential use in photoelectron information technology. The researches of nano-crystal embedded glasses with excellent third-order nonlinear optic performance have already become a kind of hotspots in such area. Nano-crystal growing from TeO2-Nb2O5-BaO-AgCl glasses was studied under controlled with auxiliary DC electric field. It was found that introducing BaO into niobium tellurite glasses would improve the chain-like glass network structure, and restrain the crystallization of TeO2 and other crystal phases relative to Te^4＋ and Nb^5＋ ions. As a result, it ensures AgCl nano-crystal to separate from TeO2-Nb2O5-BaO-AgCl glasses under appropriate thermal treatment. Furthermore, the DC auxiliary electric field, accompanied with thermal treatment, was used to promote the nucleation and crystallization of niobium tellurite glass. The growth of AgCl nano-crystal was controlled accurately with auxiliary electric field. The nano-crystal embedded niobium tellurite glasses with high performance can be prepared with such process.