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(Sm0.875La0.125)2Zr2O7的制备及反射性能研究
Research on preparation and reflection properties of (Sm0.875La0.125)2Zr2O7
- 光学精密工程 2016年24卷第10s期 页码：129-134
- 作者机构：
北京理工大学 材料学院 北京,100081
- 作者简介：
- 基金信息：国家自然科学基金资助项目（No.51302013）()
DOI：10.3788/OPE.20162413.0129
中图分类号： O766收稿日期：2016-05-28，
修回日期：2016-06-13，
纸质出版日期：2016-11-14
- 稿件说明：
移动端阅览
姜淼, 高丽红, 马壮等. (Sm<sub>0.875</sub>La<sub>0.125</sub>)<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub>的制备及反射性能研究[J]. 光学精密工程, 2016,24(10s): 129-134
JIANG Miao, GAO Li-hong, MA Zhuang etc. Research on preparation and reflection properties of (Sm<sub>0.875</sub>La<sub>0.125</sub>)<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub>[J]. Editorial Office of Optics and Precision Engineering, 2016,24(10s): 129-134
姜淼, 高丽红, 马壮等. (Sm<sub>0.875</sub>La<sub>0.125</sub>)<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub>的制备及反射性能研究[J]. 光学精密工程, 2016,24(10s): 129-134 DOI： 10.3788/OPE.20162413.0129.
JIANG Miao, GAO Li-hong, MA Zhuang etc. Research on preparation and reflection properties of (Sm<sub>0.875</sub>La<sub>0.125</sub>)<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub>[J]. Editorial Office of Optics and Precision Engineering, 2016,24(10s): 129-134 DOI： 10.3788/OPE.20162413.0129.
摘要
Sm
2
Zr
2
O
7
因具有极低的热导率、较大的热膨胀系数、较低的烧结速率和良好的热稳定性，有望应用于热障涂层领域。为了提高Sm
2
Zr
2
O
7
的反射性能，向Sm
2
Zr
2
O
7
中掺杂大尺寸La，采用固相反应烧结法制备具有焦绿石结构的（Sm
0.875
La
0.125
）
2
Zr
2
O
7
，通过X射线衍射（XRD）、扫描电镜和近红外反射光谱研究了烧结温度、显微组织和能带结构对其反射性能的影响。实验结果显示，La元素成功掺入Sm
2
Zr
2
O
7
，并保持其焦绿石晶体结构不变；随着煅烧温度的升高，（Sm
0.875
La
0.125
）
2
Zr
2
O
7
颗粒尺寸逐渐增大并趋于均匀，于1 500℃煅烧时禁带宽度最窄，反射率达到最大值，在780～2 500 nm波段整体高于80%，局部波段达到90%以上。由此表明；（Sm
0.875
La
0.125
）
2
Zr
2
O
7
材料具有良好反射性，对表面防护的发展具有一定的促进作用。
Abstract
Sm
2
Zr
2
O
7
is a promising material in the field of thermal barrier coating due to its extremely low thermal conductivity
large thermal expansion coefficient
low sintering rate and good thermal stability. In order to improve the reflective properties of the Sm
2
Zr
2
O
7
La element was dopted in Sm
2
Zr
2
O
7
. The (Sm
0.875
La
0.125
)
2
Zr
2
O
7
with pyrochlore structure was prepared by solid-phase reaction sintering
and the impact of sintering temperature
microstructure and energy band structure on its reflection property were analyzed through X-ray Diffraction (XRD)
scanning electron microscope (SEM) and near infrared reflectance spectroscopy (NIRS). The XRD images show that the element La has been successfully adulterated into Sm
2
Zr
2
O
7
with the pyrochlore structure remaining unchanged
as the particle sizes grow even with the increase of the sintering temperature. The particle distribution was in best uniformity and the band gap is the narrowest
resulting in the highest reflectivity greater than 80% within the 780-2 500 nm wave band. Especially it is over 90% for partial wave bands. To some extent
such good reflectivity has a positive effect in the development of Sm
2
Zr
2
O
7
surface protection.
关键词
Keywords
references
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