A method for preparing yttrium zirconate powder by nitrate-urea combustion method

Abstract

A method for preparing yttrium zirconate by nitrate-urea combustion method comprises the following steps: dissolving Y(NO3)3.6H2O in water to obtain a solution A, dissolving Zr(NO3)4.5H2O in deionized water to obtain a solution B, mixing solution A and solution B to obtain a mixed solution, dropwise adding urea solution into the mixed solution, adjusting pH value to 2-6, stirring at room temperature, performing ultrasonic treatment, heating at high temperature, and performing heat treatment at 500-700 DEG C for 1-3 h to obtain yttrium zirconate powder. The method of the invention has simple and convenient process, does not need special equipment, and is easy to operate, and the preparation cost is low; and the reaction system is mild and controllable, the combustion product has few impurities, the product loss rate is low, and the heat released in urea combustion in a short period of time can promote rapid low-temperature synthesis of the materials. Compared with the high-temperature solid phase method in the prior art, the method of the invention has low energy consumption and is environment-friendly.

Description

technical field [0001] The invention belongs to the field of material preparation, in particular to a combustion method for preparing yttrium zirconate (Y 2 Zr 2 o 7 ) new method of microcrystals. Background technique [0002] In the past few decades, semiconductor photocatalytic materials for the degradation of sewage, waste gas and organic pollutants have attracted great attention [Yuping Tong, Panpan Xue, et al. Preparation and characterization of Y 2 Zr 2 o 7 Nanocrystals and their photocatalytic properties[J].Materials Science and Engineering:B,2008,150(3):194-198.]. The rare earth zirconates (Ln 2 Zr 2 o 7 , Ln=lanthanides, scandium Sc, yttrium Y) have been found to have good photocatalytic activity, which expands the range of potential materials for researchers to find ideal photocatalytic materials. [0003] Since the element yttrium and another element cerium are two kinds of rare earth elements with large content on the earth, compared with other kinds of ...

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Problems solved by technology

Among the above methods, the disadvantage of the high-temperature solid-phase sintering method is that the synthesis temperature is high, the size of the generated product is large, the particle size cannot be controlled, and there is an impure phase due to uneven distribution of components, which has a stoichiometric loss; the simple sol-gel method The disadvantage is that the reaction temperature is higher and the reaction time is longer

The advantage of the hydrothermal method is that it overcomes the disadvantages of uneven distribution of components and stoichiometric loss. However, the requirements for equipment are higher and the reaction time is longer.

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