Preparation method of electronic copper-plated oxide high-temperature superconducting material PCCO single crystal

Abstract

The invention discloses a preparation method of an electronic copper-plated oxide high-temperature superconducting material PCCO single crystal. The method comprises the following steps: preparing a polycrystal PCCO sample, then adding CuO into the polycrystal PCCO sample, and carrying out double-temperature-zone heating to synthesize a single crystal PCCO sample. According to the invention, by using double-temperature-zone heating synthesis, the temperature gradient of a high-temperature zone and a low-temperature zone is increased, the time of a molten state is controlled to be 1.5 hours, and slow cooling is performed for 1125 minutes, so that smooth crystallization of a reacted sample is promoted; the time of the sample in the double-temperature area is shortened, so that the chemical reaction is fully carried out, excessive volatilization and wall climbing of CuO are avoided, the situation that the sample cannot be stripped due to pollution of the sample is prevented, and the yield of PCCO is increased; and the single crystal PCCO sample prepared by the method has high purity and high yield.

Description

technical field [0001] The invention relates to an electronic copper-plated oxide high-temperature superconducting material Pr 1.85 Ce 0.15 CuO 4 (PCCO) single crystal preparation method. Background technique [0002] Copper oxide superconductor Pr 1.85 Ce 0.15 CuO 4 Because of its special properties, it has always attracted people's great interest. Since the discovery of the first superconductor (metal element mercury), humans have been studying this field for nearly a hundred years. Due to the special physical properties of superconductors, it has attracted much attention. Due to its low superconducting transition temperature, people have been constantly looking for new superconducting materials with high transition temperatures. In 1986, the discovery of high-temperature copper oxide superconducting materials made people see the dawn. The highest superconducting transition temperature can reach 164 K, people are currently trying to find room temperature superconduc...

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Problems solved by technology

[0004] However, the traditional preparation method is to put the crucible with the sample directly into the tube furnace for heating in a single temperature zone. It is difficult to grasp the purity of the sample and the temperature and time required for crystallization. Usually, after repeated experiments, it is found that the sample in the test tube will eventually die. Climbing out along the crucible, resulting in no crystals at the end, most commonly spawning Pr 2 CuO 4 and Cu 2 O and some remaining raw materials, but it is difficult to obtain the required Pr 1.85 Ce 0.15 CuO 4 Single crystal samples, or can obtain the required Pr 1.85 Ce 0.15 CuO 4 Very low proportion of single crystal samples

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