Method for preparing polycrystalline materials by aid of high-throughput hybridization microwave synthesis processes

Abstract

The invention discloses a method for preparing polycrystalline materials by the aid of high-throughput hybridization microwave synthesis processes. The method includes weighing high-purity substance powder in glove boxes according to molar ratios; sufficiently grinding and mixing the high-purity substance powder and manufacturing wafer biscuits by the aid of tablet presses; arranging reactants in cylindrical aluminum oxide crucibles; heating the reactants in microwave ovens by the aid of SiC which is used as a heat conduction material. The method has the advantages that a plurality of samples or different composition points of the same sample can be simultaneously prepared in a high-throughput manner; the samples can be heated by the aid of microwave, the SiC is used as the heat conduction material, accordingly, the temperatures of the samples can reach required reaction temperatures within extremely short time, and the polycrystalline materials can be quickly and economically synthesized in a high-throughput manner; the polycrystalline materials can be prepared in the high-throughput manner by the aid of the method, the shortcoming of limitation on the reaction temperature and the reaction time in existing sample preparation procedures can be overcome, and the polycrystalline materials can be efficiently synthesized; synthesized tungsten bronze series AxWO3 (A=Na, Ca and B) and rare earth titanium compounds RTiO3 (R represents rare earth elements) which are prepared by the aid of the method are crystals, and accordingly the method can be widely applied to the field of technologies for preparing magnetic, superconducting and relevant materials.

Description

technical field [0001] The invention relates to a method for preparing polycrystalline materials, in particular to a method for preparing polycrystalline materials by a high-temperature solid-state reaction method, which is applied in the technical fields of magnetism, superconductivity and related material preparation. Background technique [0002] "Materials high-throughput experiment" is to complete the preparation and characterization of a large number of samples in a short time. Its core idea is to change the sequential iterative method used in traditional materials research to parallel processing, and to cause qualitative changes in the efficiency of materials research with quantitative changes. [0003] In 1970, Hanak first proposed the concept of "multi-sample experiment" and applied it to the study of binary and ternary superconducting materials in thin film form. sample array. In 2011, U.S. President Barack Obama signed the "Materials Genome Initiative (MGI)" tec...

AI Technical Summary

Problems solved by technology

[0010] R TiO 3 Polycrystalline has been prepared by traditional solid-state reaction method before, because trivalent titanate is easy to generate derivatives of other components when heated to around 300 °C, and Ti 3+ Easily oxidized to Ti in air 4+ , due to the slow heating rate of the traditional solid-state reaction method, some derivative impurities will be generated during the heating process of the sample

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