Research on preparation and reflection properties of (Sm0.875La0.125)2Zr2O7

JIANG Miao; GAO Li-hong; MA Zhuang; WANG Fu-chi; LIU Ling

doi:10.3788/OPE.20162413.0129

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Research on preparation and reflection properties of (Sm_0.875La_0.125)₂Zr₂O₇

更新时间：2020-08-13

- Research on preparation and reflection properties of (Sm_0.875La_0.125)₂Zr₂O₇
- Optics and Precision Engineering Vol. 24, Issue 10s, Pages: 129-134(2016)
- 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：
- DOI：10.3788/OPE.20162413.0129
  CLC： O766
- Received：28 May 2016，
  
  Revised：13 June 2016，
  
  Published：14 November 2016
- 稿件说明：
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姜淼, 高丽红, 马壮等. (Sm0.875La0.125)2Zr2O7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 (Sm0.875La0.125)2Zr2O7[J]. Editorial Office of Optics and Precision Engineering, 2016,24(10s): 129-134
姜淼, 高丽红, 马壮等. (Sm0.875La0.125)2Zr2O7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 (Sm0.875La0.125)2Zr2O7[J]. Editorial Office of Optics and Precision Engineering, 2016,24(10s): 129-134 DOI： 10.3788/OPE.20162413.0129.

摘要

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

的反射性能，向Sm

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

0.125

）

，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

，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

0.125

）

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

0.125

）

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

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

La element was dopted in Sm

. The (Sm

0.875

0.125

)

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

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

surface protection.

关键词

Keywords

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