Identification of Cr valence states in Cr and Nd co-doped Lu3Al5O12 laser ceramics
Identification of Cr valence states in Cr and Nd co-doped Lu3Al5O12 laser ceramics
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Cr、Nd共掺Lu3Al5O12激光陶瓷中Cr价态的识别
DOI：
10.1016/j.optmat.2016.06.026
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发表时间：
2017-09
影响因子：
3.9
通讯作者：
Zhang Long
中科院分区：
文献类型：
--
作者：
Zhang P;e;Jiang Benxue;Fan Jintai;Mao Xiaojian;Zhang Long
Cr、Nd共掺激光陶瓷作为惯性约束聚变（ICF）的潜在增益材料，受到了广泛的研究。铬离子价态的研究具有重要意义。详细研究了烧结助剂和退火气氛对Cr价态的影响，结果表明：在HIP烧结Cr（0.2at.%）中，Cr的价态为Cr ~（2+）和Cr ~（3+），Nd（0.8原子%）：LuAG激光陶瓷。随着SiO2浓度的降低和MgO含量的增加，Cr ~（2+）引起的近红外吸收峰强度减弱。在空气中退火可以消除近红外吸收。电子顺磁共振和X射线光电子能谱也证实了Cr，Nd：LuAG陶瓷中Cr离子的价态转变。
Cr and Nd co-doped laser ceramics, as the potential gain materials in inertial confinement fusion (ICF), have been widely investigated. And the study on valence states of chromium ions is important. The effects of sintering additives and annealing atmosphere on the valence state of chromium were studied in detail, and the results shown that the Cr valence states were demonstrated to be Cr2+and Cr3+ions in HIP-sintered Cr(0.2 at.%), Nd(0.8 at.%): LuAG laser ceramics. And the intensity of the near-infrared absorption band caused by Cr2+ions was attenuated with the decreasing SiO2concentration and increasing MgO amount. The near-infrared absorption could be eliminated by annealing in air. And the transformation of valence states of Cr ions in the Cr,Nd:LuAG ceramics were also confirmed by electron paramagnetic resonance and X-ray photoelectron spectroscopy.
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