研究发现，除了超导转变，该材料在73K左右表现出一个四方相（tetragonal）到坍塌四方相（collapsed tetragonal）的结构转变，而在坍塌四方相中已经不存在体超导。
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四方相手蟹 Sesarma quadrata
正交-四方相变 high-t_c superconductors
铈稳定化四方相多晶体 Ce-stabilised tetragonal polycrystals
四方公相君 Shiho Koshokun
The influence mechanism of doping rare earth oxides on the thermal physical property of YSZ is that co-doping with Gd2O3 and Yb2O3 results in lattice distortion and content variation of monoclinic phase（M）,tetragonal phase（T） and cubic phase（C） in YSZ.
稀土氧化物掺杂对YSZ陶瓷材料热物理性能的影响机制为:掺杂Gd2O3和Yb2O3导致YSZ中单斜相（M）、四方相（T）和立方相（C）含量发生变化,同时YSZ晶格发生畸变。
参考来源 - 多元稀土氧化物掺杂二氧化锆基陶瓷材料的热物理性能·2,447,543篇论文数据，部分数据来源于NoteExpress
我们还研究了PT四方相区和立方相区介电常数与晶格畸变的关系。
We also study the relation between the dielectric constant and lattice distortion of the PT tetragonal and cubic phase region.
结果表明，涂层主要以四方相和立方相构成，并含有少量的单斜相。
The results indicate that the coating is mainly composed of tetragonal and cubic phase and a small amount of monoclinic zirconia.
当暴露于空气中时，表面氧空位能够捕获空气中的氧，有利于表面四方相转变为单斜相。
When the sample is exposed to air, the elimination of these vacancies by the incorporation of oxygen facilitates the transformation from the tetragonal to the monoclinic phase.
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