Method for preparing perovskite nano powder

A nano-powder and perovskite technology, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problem of difficult control of stoichiometric ratio of composite perovskite powder, product agglomeration, dispersion of grain size distribution, etc. problem, to achieve the effect of simple and intuitive control method, complete powder crystallization, and concentrated distribution
CN104477978AActive Publication Date: 2015-04-01TSINGHUA UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2015-04-01

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Abstract

The invention provides a method for preparing ABO3 perovskite nano powder. The method comprises the following steps: dropwisely adding a B-site element source alcohol solution into surfactant / acetic acid-dissolved deionized water to obtain a mixed solution, adding ammonia water into the mixed solution, and reacting the reaction system at constant temperature to obtain a B-site element hydrous oxide gel; and preparing a B-site element hydrous oxide gel dispersion solution, adding an A-site element source into the dispersion solution, and carrying out hydrothermal reaction under normal pressure to obtain the ABO3 perovskite nano powder. The aqueous gel-normal pressure hydrothermal process and raw materials with lower cost are adopted, and the aqueous reaction is utilized to avoid the toxicity of the organic solvent. The pH value, surfactant amount, reaction raw material concentration, reaction time, reaction temperature and other conditions of the system are regulated to effectively control the size of the product, thereby obtaining the well-crystallized monodisperse perovskite powder with the particle size of 15-300nm.
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Description

technical field

[0001] The invention belongs to the field of perovskite material preparation, and in particular relates to a method for preparing perovskite nano powder. Background technique

[0002] Common ABOs 3 ceramic materials with perovskite structure including BaTiO 3 , CaTiO 3 , PbTiO 3 、Ba x Sr 1-x TiO 3 、BaZr x Ti 1-x o 3 、Ba x Ca 1-x Ti y Zr 1-y o 3 Wait. Due to the excellent dielectric, ferroelectric, piezoelectric, and photocatalytic properties of perovskite ceramic materials, they have very extensive and important applications in industry. e.g. BaTiO 3 It plays an important role in thermistors, multilayer ceramic capacitors, electro-optical devices, etc.; BaZr x Ti 1-x o 3 and Ba x Ca 1-x Ti y Zr 1-y o 3 It has attracted attention in the fields of Y5V dielectric materials and lead-free piezoelectricity. Various perovskite ceramics have been intensively studied in thin films, sensors, energy storage, etc.

[0003] The preparation method...

Claims

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