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在高温超导陶瓷、钒氧化物和铁氧体中加入碲或碲与金属的复合氧化物,在恰当的工艺条件下,可以提高试样的硬度、致密度、钇系高Tc超导陶瓷的电流密度,降低铁氧体的居里点,导致铋系高温超导体出现高温亚稳相,在钒氧化物中引起介电常数峰以及使340K相变时电阻率曲线出现奇异。本文用固态相变的观点和元素碲的特性讨论了这些现象。
In the high-temperature superconducting ceramics, vanadium oxide and ferrite by adding tellurium or tellurium and metal composite oxide, under the proper process conditions, can improve the hardness of the sample, the density of yttrium-based high Tc superconducting ceramic The current density decreases the Curie point of the ferrite, resulting in the high temperature metastable phase of the bismuth-based high temperature superconductor, the dielectric constant peak in the vanadium oxide, and the strangeness of the resistivity curve at the 340K phase transition. These phenomena are discussed in this paper from the point of view of solid-state transformation and the character of elemental tellurium.