H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol, BS8 1TL, United Kingdom.
Phys Rev Lett. 2009 Nov 27;103(22):225702. doi: 10.1103/PhysRevLett.103.225702. Epub 2009 Nov 23.
The structure and thermal characteristics of aerodynamically levitated samples of yttria-alumina in the liquid, supercooled liquid and solid phases were explored in an extensive series of high energy x-ray diffraction, small angle neutron scattering, and pyrometric cooling measurements. Particular focus was placed on the compound (Y2O3)(x)(Al2O3)(1-x) with x = 0.2 for which a liquid-liquid phase transition at a temperature of 1788 K has recently been reported. No structural or thermal signature in support of this metastable phase transition could be found.
采用一系列高能 X 射线衍射、小角中子散射和高温计冷却测量法，研究了悬浮在空气中的氧化钇-氧化铝在液相、过冷液相和固相中的结构和热特性。研究特别关注了化合物 (Y2O3)(x)(Al2O3)(1-x)，其中 x = 0.2，最近有报道称该化合物在 1788 K 的温度下发生液-液相转变。但未发现任何支持这种亚稳相转变的结构或热特征。
