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

被引：33

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

页码：2614 / 2617

页数：4

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