硫属铋镉化物着色的新型近红外滤光玻璃

New Near Infrared Glasses Coloured by Bismuth and Cadmium Chalcogenides

以半导体着色理论为指导,采用硫属铋化物为着色剂通过掺杂 CdS(Se),得到了一种透过率高、吸收界限分别位于1.0和1.5μm 的新型近红外滤光玻璃。研究了 ZnO、Bi_2O_3含量对玻璃光吸收性的影响,其适宜用量和最低量分别为16.0～28.0wt%和3.0wt%。微量组份可促进玻璃显色,降低显色温度。选择对着色剂具有较大溶解度的 K_2O-ZnO-SiO_2和 Na_2O-K_2O-ZnO-SiO_2系统为基玻璃,并对玻璃的理化、电学性能等进行了测试。结果表明,在 K_2O-ZnO-SiO_2系统中以 Na_2O 取代部分 K_2O 后,玻璃的主要性能得到改善。由半导体物理学的讨论可知,从具有较小禁带宽度值的硫属铋化物单独着色,得不到透过率高、吸收界限陡的滤光玻璃,这对此类玻璃今后的研制与开发具有指导意义。

On the colouring theory of semiconducting compounds,glasses coloured by bismuth chalcogenides were systemetically studied.By doping CdS(Se),a kind ofnew near infrared filter glasses with high transmissivity,cut-on wavelength of 1.0to 1.5μm was obtained.The effects of ZnO and Bi_2O_3 contents on the absorptivity of glasses werestudied with the appropriate amount and lowest amount being 16.0-28.0wt% and3.0wt% respectively.Minor components are helpful to the colour rendering ofglasses,and can decrease the colour rendering temperature.he glasses of K_2O-ZnO-SiO_2 and Na_2O-K_2O-ZnO-SiO_2 systems with highsolubility to colorants were chosen as base glasses.Some physical,chemical and electrical properties were measured,it is showed that main performances of the glasses were improved,when sodium oxide replaced part of potassium oxide in the glasses of K2_O-ZnO-SiO_2 system.According to physics of semiconductors,glasses with high transmissivity,steep cut-on edge can not be obtained,using only bismuth chalcogenides with narrower energy gap as colorants.This viewpoint is helpful to the investigation of the glsses in the future.