稀土锆酸盐RE2Zr2O7材料的Mueller矩阵特性研究

Study on Mueller Matrix Properties of Rare Earth Zirconate RE2Zr2O7 Materials

摘要:

稀土锆酸盐RE₂Zr₂O₇是有巨大发展潜力的高温热障涂层材料，因优异的综合服役性能而受到广泛关注。目前，该材料体系的力学和热学性能研究较为成熟，但光学性能研究不足，特别是该材料体系的光学偏振特性及光学各项异性鲜见报道。为了系统研究RE₂Zr₂O₇材料的光学本征偏振特性，采用固相反应法合成制备了RE₂Zr₂O₇（RE=La、Nd、Sm、Gd、Er、Yb）系列的致密块体状材料，搭建了针对性光学偏振特性系统测试平台。采用旋转线延迟器法与多波长旋转Mueller矩阵数值计算相结合的方法，较为系统地研究了RE₂Zr₂O₇材料光学偏振特性，特别是对该材料体系的Mueller矩阵特性进行了系统的研究。实验中采用多波长旋转式Mueller矩阵测量法获得RE₂Zr₂O₇材料体系的Mueller矩阵，并得到了Mueller矩阵的16个参量及其与波长的对应关系。在对称角度和非对称角度下，分别研究了该材料体系的双向衰减参量D(M)和起偏参量P(M)的特性，并对Mueller矩阵参数进行了变换。研究结果表明，在对称角度和非对称角度探测下，每种材料的各向异性参数K具有明显的不同，对称方向的各向异性强于非对称方向。双向衰减参量D(M)和起偏参量P(M)表现出对材料种类有显著的依赖性，而与探测角度和探测方式相关性较弱。根据这种特性可实现对RE₂Zr₂O₇涂层材料的偏振特异性探测和伪装进行针对性设计，从而达到满足其光学使用功能的目的。

Abstract:

In recent years， rare earth zirconates with RE₂Zr₂O₇ chemical composition have received widespread attention due to their excellent comprehensive service performance， and exhibit great potential in the preparation of high temperature thermal barrier coating materials.. Currently， the research on the mechanical and thermal properties of the materials are relatively mature， but the research on optical properties is insufficient， especially the optical polarization characteristics and optical anisotropy are rarely reported. In order to systematically study the intrinsic polarization characteristics of RE₂Zr₂O₇ material， a series of dense bulk materials of RE₂Zr₂O₇ （RE=La， Nd， Sm， Gd， Er， Yb） were synthesized using solid-state reaction method. A targeted optical polarization characteristic system testing platform was established， and the optical polarization characteristics of RE₂Zr₂O₇ material were systematically studied using the rotation line delay method， multi wavelength rotation Mueller matrix， with numerical calculation， Especially， a systematic study was conducted on the Mueller matrix characteristics of the material system. In the experiment， a multi wavelength rotating Mueller matrix measurement method was used to measure the Mueller matrix of the RE₂Zr₂O₇ material system， and 16 parameters of the Mueller matrix and their corresponding relationships with wavelength were obtained. The bidirectional attenuation parameter D（M） and polarization parameter P（M） characteristics of the material system were studied at symmetric and asymmetric angles， respectively. And transform the parameters of the Mueller matrix also conducted. It is shown that under the detection of symmetric and asymmetric angles， the anisotropy parameter K of each material is significantly different， and the anisotropy in the symmetric direction is stronger than that in the asymmetric direction. The bidirectional attenuation parameter D（M） and the polarization parameter P（M） exhibit a significant dependence on the material type， but have weak correlation with the detection angle and detection method. Based on this characteristic， targeted design can be achieved for polarization specific detection and camouflage of RE₂Zr₂O₇ coating materials， in order to meet their optical usage functions.