As a novel candidate of thermal barrier coatings materials proposed recently, rare earth tantalates (RETaO₄) are attractive series because of its excellent attributes. With respect to RETaO₄ compound, it exists at least three types of polymorphs and two phase-transformation mechanisms. In this paper, the monoclinic (Y_1-xYb_x)TaO₄ compounds with diverse space groups are investigated systematically, and contents involve phase, microstructural and thermophysical properties’ evolution with the changes of composition and structure. The primary purpose of this paper is to optimize the thermophysical properties of (Y_1-xYb_x)TaO₄ ceramics by adjusting the Y/Yb ratio, and further physical mechanisms of its heat transfer are also revealed.

作为最近提出的新型隔热涂料的候选材料，稀土钽酸盐（RETaO ₄）由于其优异的特性而成为有吸引力的系列。对于RETaO ₄化合物，存在至少三种类型的多晶型物和两种相变机理。本文系统地研究了具有不同空间基团的单斜（Y _1-x Yb _x）TaO ₄化合物，其含量涉及相，微结构和热物理性质随着组成和结构的变化而演变。本文的主要目的是优化（Y _1-x Yb _x）TaO ₄的热物理性质 通过调整Y / Yb比率来确定陶瓷，并进一步揭示了其传热的物理机理。