Preparation method of holmium cuprate nano powder

Abstract

The invention discloses a preparation method of holmium cuprate nano powder. The preparation method comprises the following steps: weighing a Cu soluble salt and a Ho soluble salt according to the Cu / Ho stoichiometric proportion in the holmium cuprate Ho2Cu2O5, dissolving the Cu soluble salt and Ho soluble salt in deionized water, and uniformly mixing to prepare a solution A; weighing pyridine carboxylic acid, dissolving the pyridine carboxylic acid in alcohol, and adding an alkali to prepare a solution B; mixing the solution A and solution B, and stirring to prepare a solution C; slowly heating the solution C to precipitate a precursor D; sintering the precursor D in a reducing gas atmosphere, cooling to room temperature, and calcining in an air atmosphere to obtain a calcined product; and pulverizing the calcined product, grinding, screening, washing and drying. The preparation method disclosed by the invention can be used for preparing high-purity uniform-component Ho2Cu2O5 nano powder. The preparation method has the advantages of simple and accessible raw materials, low cost, mild conditions and high controllability, and is simple to operate.

Description

Technical field [0001] The invention relates to a preparation method of holmium cuprate nanopowder, in particular to the technical field of preparation of copper-based rare earth materials. Background technique [0002] The common configuration of copper-based rare earth materials is A 2 B 2 O 5 , Belongs to the layered perovskite type oxide, and the layered perovskite type oxide is widely used because of its special physical and chemical properties. Mainly used in sensors, electrolytes, superconductors, electrode materials, and improving the environment. The study on the preparation of layered perovskite-type oxides has broad application prospects. Controlling its morphology can change its structure and performance, thereby improving its many deficiencies in various applications. [0003] Common methods for preparing copper-based rare earth materials include high-temperature solid-phase synthesis, sol-gel, co-precipitation, hydrothermal, combustion, and so on. These methods all ...

AI Technical Summary

Problems solved by technology

These methods all face the same problem: they cannot solve the problem of strict stoichiometric ratio of copper ions and rare earth ions, and cannot prepare products with high purity and uniform composition, and the purity of samples is closely related to their properties.

However, the Ho prepared by the existing preparation method 2 Cu 2 o 5 Powders often have problems such as low purity, uneven particle size, small specific surface area, and failure to reach nanometer size, which limits the Ho 2 Cu 2 o 5 Therefore, it is particularly necessary to invent a method for preparing holmium cuprate nanopowder with high purity and uniform composition.

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