掺杂金微粒Na_2O-B_2O_3-SiO_2系统玻璃的溶胶-凝胶方法制备及其光学性质的表征

采用正硅酸乙酯，硼酸，乙醇钠为先驱体，乙醇，乙二醇甲醚和乙醇为先驱体溶剂，并采用氯化金的水溶液为掺杂金微粒的先驱体，通过热处理使氯化金分解出金原子而使其长出金微粒，达到制备掺杂金微粒玻璃的目的。在钠硼硅系统干胶的制备过程中，详细地研究了氯化金的引入量等对大块干胶性质的影响，并确定了引入氯化金的适宜浓度。详细研究了干胶向玻璃转变的制备工艺，并成功地制备了掺杂金微粒的大块玻璃。采用X-射线衍射仪进行掺杂金微粒干胶和玻璃的桥晶与否分析，用紫外-可见吸收光谱研究了它们的光学性质。用透射电镜表征了金微粒在玻璃基质中的颗粒大小及分布，采用Z－Scan装置表征了此种玻璃的三阶非线性光学性质，得到折射率n2＝8．22×10－12esu。

Optical Characterization and Preparation of Au Doped Na_2O-B_2O_3-SiO_2 Glass by Sol-Gel Method

The Sodiun, borosilicate glasses doped with Au particles were prepared by sintering sodium borosilicate transparent bulk gels doped with Au which were prepared by using tetraethyl orthosilicate, boric acid and sodium alkoxide as precursors; ethanol,glycolic methyl ether and ethanol as precursor solvents; hydrochloric acid as catalyst and HAuCla. 4H2O as precursor of Au in Na2o-B2O3-SiO2systems. The effects of contents of HAuCl4. 4H2O on the properties of stiff gels and the conversion mechanisms of gels contatining Au into glasses were investigated in detail. The optical properties and microstructure of gels and glasses containing Au were studied by means of UV-visible absorption spectra and TEM respectively. And the third-order non-linear optical properties of glasses containing Au were characterized by Z-scan technique, the third nonlinear refractive index of glass containing Au (n2) is 8.22×10 -12 esu.