(Ca, Cr)共掺YAG陶瓷的红外辐射性能研究

doi:10.15541/jim20160199

无机材料学报 ›› 2016, Vol. 31 ›› Issue (10): 1094-1098.DOI: 10.15541/jim20160199

(Ca, Cr)共掺YAG陶瓷的红外辐射性能研究

布丛郝^{1, 2}, 贺刚², 李江涛²

(1. 中国科学院大学, 北京100049; 2. 中国科学院理化技术研究所, 北京100190)

收稿日期:2016-03-29 修回日期:2016-06-07 出版日期:2016-10-20 网络出版日期:2016-09-23
作者简介:布丛郝(1991–), 男, 硕士研究生. E-mail: buconghao@126.com
基金资助:
国际科技合作专项(2014DFR51010);国家自然科学基金(51372255, 51422211, 51432004);中国科学院国际合作局对外合作重点项目(GJHZ201310);北京市自然科学基金(2131006)

Infrared Emission Property of (Ca, Cr) Co-doped YAG Ceramics

BU Cong-Hao^{1, 2}, HE Gang², LI Jiang-Tao²

(1. University of Chinese Academy of Sciences, Beijing 100049, China; 2. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China)

Received:2016-03-29 Revised:2016-06-07 Published:2016-10-20 Online:2016-09-23
About author:BU Cong-Hao. E-mail: buconghao@126.com
Supported by:
International Science and Technology Cooperation Program of China (2014DFR51010);National Natural Science Foundation of China (51372255, 51422211, 51432004);External Cooperation Program of Chinese Academy of Sciences (GJHZ201310);Beijing Natural Science Foundation (2131006)

摘要/Abstract

摘要：

通过高温固相反应合成工艺制备了(Ca, Cr)共掺YAG陶瓷, 研究了Ca²⁺、Cr³⁺离子掺杂对YAG陶瓷红外辐射性能的影响。X射线衍射分析结果表明, Ca²⁺、Cr³⁺离子掺杂样品具有钇铝石榴石结构。红外性能测试表明: 掺杂前后样品在0.75~2.5 μm波段的红外吸收率由0.03提升至0.90, 较之掺杂前提高了29倍。通过基于吸光度测试结果的计算发现, (Ca, Cr)共掺使得YAG陶瓷禁带宽度下降了1.77 eV, 使得自由载流子吸收得以强化, 这可能是(Ca, Cr)共掺YAG陶瓷在近红外波段具有高发射率的主要原因。

关键词: 共掺杂, 红外发射率, 近红外吸收, 禁带宽度

Abstract:

(Ca, Cr) co-doped YAG ceramics were synthesized by high temperature solid state reaction. The effects of Ca²⁺ and Cr³⁺ ions doping on the infrared emission properties of YAG ceramics were investigated. X-ray diffraction results showed that the phase composition of the prepared samples were yttrium aluminum garnet, which indicated that the Ca²⁺ and Cr³⁺ irons were incorporated into the crystal lattice of yttrium-aluminate garnet structure. Infrared absorption results showed that the infrared absorptivity of the (Ca, Cr) co-doped samples was 0.90, which was 29 times higher than that of the pure YAG sample (0.03). The band gap of YAG ceramics were decreased 1.77 eV by Ca²⁺ and Cr³⁺ co-doping based on calculation of the absorbance test results. Therefore, the absorption of the free carrier was improved, which is the main reason why the (Ca, Cr) co-doping YAG ceramics have a high emissivity in near infrared wavelength.

Key words: co-doped, infrared emissivity, near-infrared absorption, the band gap

中图分类号:

TQ174

布丛郝, 贺刚, 李江涛. (Ca, Cr)共掺YAG陶瓷的红外辐射性能研究[J]. 无机材料学报, 2016, 31(10): 1094-1098.

BU Cong-Hao, HE Gang, LI Jiang-Tao. Infrared Emission Property of (Ca, Cr) Co-doped YAG Ceramics[J]. Journal of Inorganic Materials, 2016, 31(10): 1094-1098.

图/表 5

图1 Y2.5Ca0.5Cr0.5Al4.5O12 (a)和Y3Al5O12(b)陶瓷样品的XRD图谱

Fig. 1 XRD patterns of Y2.5Ca0.5Cr0.5Al4.5O12 (a) and Y3Al5O12 (b) ceramic samples

图2 Y3Al5O12(a)与Y2.5Ca0.5Cr0.5Al4.5O12(b)陶瓷样品的SEM照片

Fig. 2 SEM images of Y3Al5O12 (a) and Y2.5Ca0.5Cr0.5Al4.5O12 (b) ceramic samples

图3 Y3Al5O12、Y3Cr0.5Al4.5O12和Y2.5Ca0.5Cr0.5Al4.5O12 陶瓷样品的吸收光谱图

Fig. 3 Absorptivity spectra of Y3Al5O12, Y3Cr0.5Al4.5O12 and Y2.5Ca0.5Cr0.5Al4.5O12 ceramic samples

图4 Y3Al5O12、Y3Cr0.5Al4.5O12和Y2.5Ca0.5Cr0.5Al4.5O12 陶瓷样品的吸光度(a)与(αhν)2~hν关系(b)

Fig. 4 Absorbance spectra (a) and plot of hν~(αhν)2 (b) of Y3Al5O12, Y3Cr0.5Al4.5O12 and Y2.5Ca0.5Cr0.5Al4.5O12 ceramic samples

表1 Y3Al5O12(E1)、Y3Cr0.5Al4.5O12(E2)和Y2.5Ca0.5Cr0.5 Al4.5O12(E3) 陶瓷样品的红外发射率

Table1 Infrared emissivity of Y3Al5O12, Y3Cr0.5Al4.5O12 and Y2.5Ca0.5Cr0.5Al4.5O12 ceramic samples

Sample	3-5 μm	8-14 μm
E1	0.43	0.88
E2	0.61	0.89
E3	0.83	0.90

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(Ca, Cr)共掺YAG陶瓷的红外辐射性能研究

Infrared Emission Property of (Ca, Cr) Co-doped YAG Ceramics

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