Thermo-optical properties of LaMg1-xNixAl11O19 (0 ≤ x ≤ 1) hexaaluminates for metallic thermal protection system

被引：31
|
作者：
Liu, Hong-Zhi [1 ]
Liu, Zhan-Guo [1 ]
Ouyang, Jia-Hu [1 ]
Wang, Ya-Ming [1 ]
机构：
[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China
来源：
MATERIALS LETTERS | 2011年 / 65卷 / 17-18期
基金：
中国国家自然科学基金;
关键词：
Ceramics; Sintering; FTIR; Infrared emissivity; Optical absorption; LANTHANUM HEXAALUMINATE; CATALYTIC COMBUSTION; BARRIER COATINGS;
D O I：
10.1016/j.matlet.2011.05.093
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
LaMg1-xNixAl11O19 (x=0, 0.25. 0.5. 0.75, 1) ceramics are fabricated by pressureless-sintering method at 1700 C for 10 h in air. The microstructure and thermo-optical properties of LaMg1-xNixAl11O19 ceramics are investigated by the X-ray diffraction, scanning electron microscopy and Fourier transform infrared spectroscopy measurements. The influence of NiO doping on structure and thermo-optical properties of LaMg1-xNixAl11O19 ceramics is investigated. The partial substitution of Ni2+ for Mg2+ results in a significant increase in emissivity at low wavelengths as compared with unmodified LaMgAl11O19. When the Ni2+ content increases to x = 0.75 or above, LaMg1-xNixAl11O19 ceramics have a high emissivity value above 0.70 at low wavelengths at 500 degrees C. The measured emissivity of all LaMg1-xNixAl11O19 ceramics shows a similar trend in the wavelength range of 6 to 14 mu m. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：2614 / 2617
页数：4
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