Optical absorption and thermionic emission mechanism of multi-functional La1-xSrxB6 hexaborides

被引：4
|
作者：
Hong-Yan, Zhang [1 ]
Li-Hong, Bao [1 ]
Luo-Meng, Chao [2 ]
Feng-Qi, Zhao [1 ]
Zi-Zhong, Liu [3 ]
机构：
[1] Inner Mongolia Normal Univ, Coll Phys & Elect Informat, Hohhot 010022, Peoples R China
[2] Inner Mongolia Univ Sci Technol, Coll Sci, Baotou 014010, Peoples R China
[3] Inner Mongolia Normal Univ, Coll Chem & Environm Sci, Hohhot 010022, Peoples R China
来源：
ACTA PHYSICA SINICA | 2021年 / 70卷 / 21期
基金：
中国国家自然科学基金;
关键词：
LaB6; nanocrystalline; optical absorption; thermionic emission; NEAR-INFRARED LIGHT; LAB6; NANOPARTICLES; SYSTEM;
D O I：
10.7498/aps.70.20211069
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The optical absorption property of the nanocrystalline La1-xSrxB6 powder and thermionic emission property of the La1-xSrxB6 polycrystalline bulk are investigated. As a result, the transmission wavelength of LaB6 is red-shifted from 591 nm to 658 nm with the increase of Sr doping content. The emission tests indicate that the thermionic emission current density of La1-xSrxB6 polycrystalline bulk increases from 2.3 A/cm(2) to 19.36 A/cm(2) with the increase of La doping content under an applied voltage of 2000 V. The first-principle calculation results reveal that Sr doping LaB6 leads plasma frequency energy and Fermi level to decrease, resulting in the tunable characteristics of transmission wavelength and enhancement of thermionic emission. Therefore, the Sr-doped LaB6 as a multifunctional ceramic has a potential application in the field of optical filter or becomes a promising cathode for microwave device.
引用
收藏
页数：10
相关论文
共 37 条
  • [1] Absorption and scattering of near-infrared light by dispersed lanthanum hexaboride nanoparticles for solar control filters
    Adachi, Kenji
    Miratsu, Mitsunobu
    Asahi, Tsuyoshi
    [J]. JOURNAL OF MATERIALS RESEARCH, 2010, 25 (03) : 510 - 521
  • [2] Bao LH, 2015, J INORG MATER, V30, P1110
  • [3] Structural, magnetic, and thermionic emission properties of multi-functional La1-xCaxB6 hexaboride
    Bao, Lihong
    Qi, Xiaoping
    Bao, Tana
    Tegus, O.
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2018, 731 : 332 - 338
  • [4] Effects of induced optical tunable and ferromagnetic behaviors of Ba doped nanocrystalline LaB6
    Bao, Lihong
    Qi, Xiaoping
    Tana
    Chao, Lumen
    Tegus, O.
    [J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2016, 18 (28) : 19165 - 19172
  • [5] Synthesis, and magnetic and optical properties of nanocrystalline alkaline-earth hexaborides
    Bao, Lihong
    Qi, Xiaoping
    Tana
    Chao, Luomeng
    Tegus, O.
    [J]. CRYSTENGCOMM, 2016, 18 (07): : 1223 - 1229
  • [6] Tunable transmission light in nanocrystalline La1-x,EuxB6
    Bao, Lihong
    Chao, Lumen
    Wei, Wei
    Tegus, O.
    [J]. MATERIALS LETTERS, 2015, 139 : 187 - 190
  • [7] First-principles study on the electronic structure, phonons and optical properties of LaB6 under high-pressure
    Chao, Luomeng
    Bao, Lihong
    Wei, Wei
    Tegus, O.
    Zhang, Zhidong
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2016, 672 : 419 - 425
  • [8] The effect of Sm-doping on optical properties of LaB6 nanoparticles
    Chao, Luomeng
    Bao, Lihong
    Shi, Junjie
    Wei, Wei
    Tegus, O.
    Zhang, Zhidong
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2015, 622 : 618 - 621
  • [9] Preparation of LaB6 nanoparticles as a novel and effective near-infrared photothermal conversion material
    Chen, Cheng-Jia
    Chen, Dong-Hwang
    [J]. CHEMICAL ENGINEERING JOURNAL, 2012, 180 : 337 - 342
  • [10] Near-Infrared Light-Activatable Microneedle System for Treating Superficial Tumors by Combination of Chemotherapy and Photothermal Therapy
    Chen, Mei-Chin
    Lin, Zhi-Wei
    Ling, Ming -Hung
    [J]. ACS NANO, 2016, 10 (01) : 93 - 101
1234