Cr掺杂YAG透明陶瓷的价态调控及光学性能研究  

Valence Regulation and Optical Properties of Cr-Doped YAG Transparent Ceramics

作　　者：黄秋凤[1] 邓志强 陈剑[1] 郭旺[1] 邓种华[1] 刘著光[1] 黄集权[1] HUANG Qiufeng;DENG Zhiqiang;CHEN Jian;GUO Wang;DENG Zhonghua;LIU Zhuguang;HUANG Jiquan(Key Laboratory of Optoelectronic Materials Chemistry and Physics,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China;College of Chemistry,Fuzhou University,Fuzhou 350108,China)

机构地区：[1]中国科学院福建物质结构研究所,光电材料化学与物理重点实验室,福州350002 [2]福州大学化学学院,福州350108

出　　处：《人工晶体学报》2024年第11期1909-1917,共9页Journal of Synthetic Crystals

基　　金：国家重点研发计划(2023YFB3812000,2021YFB3502700)。

摘　　要：Cr^(4+)∶YAG晶体材料是一种理想的被动调Q材料。利用MgO、CaO作为价态平衡剂和烧结助剂,采用低温真空预烧结结合热等静压(HIP)烧结成功制备了高光学质量的0.25%Cr^(4+)∶YAG(摩尔分数)透明陶瓷。探索了MgO、CaO及MgO-CaO双掺添加剂对Cr^(4+)∶YAG陶瓷的透过率、吸收光谱和荧光性能的影响规律。研究发现,相较于CaO和MgO-CaO双掺添加剂,MgO在1550℃低温真空预烧结时展现出了最好的Cr^(4+)∶YAG助烧致密化作用。尤其当MgO添加的摩尔分数为0.25%时,陶瓷相对密度高达98%。在1680℃HIP烧结之后的Cr^(4+)∶YAG陶瓷在1400 nm处直线透过率达到了最高值84.4%。与此同时,在1400℃退火处理20 h后,Cr^(4+)∶YAG陶瓷尽管仍存在部分Cr^(3+),但在1030 nm处Cr^(4+)的吸收系数高达3.0 cm^(-1)。Cr^(4+)∶YAG crystal materials have been proved to be an ideal passive Q-switched material in recent years.Using MgO and CaO as sintering aid and charge compensation agent,0.25%Cr^(4+)∶YAG(molar concentration)transparent ceramics with high optical quality were successfully prepared by low-temperature vacuum sintering combined with hot isostatic pressing(HIP)sintering.Effect of MgO,CaO,and MgO-CaO co-added divalent oxides on the transmittance,absorption spectra,and fluorescent properties of Cr^(4+)∶YAG ceramics were investigated.It is found that,compared with CaO and MgO-CaO series,MgO exhibits the most significant effect on the densification of Cr^(4+)∶YAG ceramics when the vacuum-sintering temperature is 1550℃.Especially when the molar concentration of MgO is 0.25%,the relative density reaches 98%.After HIP sintering at 1680℃,the corresponding in-line transmittance of the densified Cr^(4+)∶YAG ceramics reaches as high as 84.4%at the wavelength of 1400 nm.Moreover,by annealing at 1400℃for 20 h,the absorption coefficient of Cr^(4+)at 1030 nm reaches the highest value of 3.0 cm^(-1),though some Cr^(3+)still remain in the Cr^(4+)∶YAG ceramics.

关 键 词：Cr^(4+)∶YAG陶瓷 价态调控 光学性能 透明陶瓷 烧结助剂 

分 类 号：O734[理学—晶体学] O482.31