Hexagonal boron nitride nanosheets incorporated antireflective silica coating with enhanced laser-induced damage threshold

作     者：Jing Wang Chunhong Li Wenjie Hu Wei Han Qihua Zhu Yao Xu 

作者机构：Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001China Research Center of Laser FusionChina Academy of Engineering PhysicsMianyang 621900China State Key Laboratory of Transient Optics and PhotonicsXi'an Institute of Optics and Precision MechanicsChinese Academy ofSciencesXi'an 710119China University of Chinese Academy of SciencesBeijing 100049China 

出 版 物：《High Power Laser Science and Engineering》 (高功率激光科学与工程（英文版）)

年 卷 期：2018年第6卷第2期

页      面：92-97页

核心收录：

学科分类：03[法学] 0302[法学-政治学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：supported by National Natural Science Foundation of China(Nos.U1530148 and 61605188) 

主　　题：hexagonal boron nitride laser-induced damage silica antireflective coating thermal conductivity 

摘      要：Boron nitride(BN) nanosheets incorporated silica antireflective(AR) coating was successfully prepared on fused silica substrate to improve the antilaser-damage ability of transmissive optics used in high-power laser systems. The BN nanosheets were obtained by urea assisted solid exfoliation, and then incorporated into basic-catalyzed silica sols without any further treatment. The transmission electron microscope(TEM) images indicated that the BN nanosheets generally consisted of 2–10 layers. The antireflective BN/SiO_2 coating exhibited excellent transmittance as high as 99.89% at351 nm wavelength on fused silica substrate. The thermal conductivity 0.135 W · m^(-1)· K^(-1) of the BN/SiO_2 coating with 10% BN addition was about 23% higher than 0.11 W · m^(-1)· K^(-1) of the pure SiO_2 AR coating. The laser-induced damage threshold(LIDT) of that BN/SiO_2 coating is also 23.1% higher than that of pure SiO_2 AR coating. This research provides a potential application of BN/SiO_2 coatings in high-power laser systems.