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Method for preparing SrMnO3 ceramic powder by using sol-gel method

A sol-gel method and a technology of ceramic powder, which is applied in the field of single-phase magnetoelectric ceramic materials, can solve the problems of uneven particle distribution, complex reaction conditions and high crystallization temperature, and achieve simple process, high purity and low cost. Effect

Active Publication Date: 2016-01-06
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the invention is to prepare pure phase SrMnO in order to solve existing method 3 Ceramic powder has problems such as high crystallization temperature, uneven particle distribution, complex reaction conditions of high temperature and high pressure, and high cost. A method for preparing SrMnO by sol-gel method is provided. 3 ceramic powder method

Method used

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specific Embodiment approach 1

[0028] Specific implementation mode 1: This implementation mode is a method for preparing SrMnO by sol-gel method 3 The method of ceramic powder is completed in the following steps:

[0029] 1. Add strontium acetate to glacial acetic acid with a mass fraction of 99.5% to 99.9%, then stir at room temperature at a stirring speed of 150r / min to 300r / min for 10min to 15min, then add a mass fraction of 99.0% to 99.8 % ethylene glycol, and then stirred at a stirring speed of 150r / min to 300r / min for 10min to 40min to obtain solution A;

[0030] The amount of substance of strontium acetate described in step 1 and the volume ratio of the glacial acetic acid that mass fraction is 99.5%~99.9% are 1mmol:(1.8mL~2.4mL);

[0031] The mass fraction described in step 1 is that the mass fraction of 99.5%~99.9% glacial acetic acid and the mass fraction of 99.0%~99.8% ethylene glycol are (2.4~3.2):1;

[0032] 2. Add manganese acetate into glacial acetic acid with a mass fraction of 99.5% to 99...

specific Embodiment approach 2

[0049] Specific embodiment two: the difference between this embodiment and specific embodiment one is: in step one, strontium acetate is added to the glacial acetic acid with a mass fraction of 99.8%, and then at room temperature and at a stirring speed of 200r / min, stir for 15min , then add ethylene glycol with a mass fraction of 99.5%, and then stir for 20 min at a stirring speed of 200 r / min to obtain solution A. Others are the same as the first embodiment.

specific Embodiment approach 3

[0050] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: in step 2, manganese acetate is added in the glacial acetic acid that mass fraction is 99.8%, and then at temperature is 80 ℃ and stirring speed is 200r / Min under stirring for 10min, and then at a temperature of 70°C and a stirring speed of 200r / min, drop in ethylene glycol with a mass fraction of 99.5% at a rate of 40 drops / min, and then at a temperature of 70°C and a stirring speed of 200r / min Stir at 200r / min for 60min, then naturally cool to room temperature to obtain solution B. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides a method for preparing SrMnO3 ceramic powder by using a sol-gel method and relates to the field of a single phase magnetoelectric ceramic material. The method provided by the invention aims to solve the problems that the crystallization temperature is high, particle distribution is non-uniform, high-temperature and high-pressure complex reaction conditions are required, the cost is high and the like in the preparation of pure phase SrMnO3 ceramic powder by virtue of a current method. The method comprises the steps of: I, preparing a solution A; II, preparing a solution B; III, preparing an SrMnO3 sol; IV, preparing a dried gel; and V, grinding and calcining the mixture and then furnace-cooling the mixture naturally to room temperature to obtain the SrMnO3 ceramic powder. The method provided by the invention has the advantages: the prepared SrMnO3 ceramic powder is few in impurity and high in purity; the output of the SrMnO3 ceramic powder is 90-95%; compared with the prior art, the cost of the prepared SrMnO3 ceramic powder is lowered by 40-50%. The invention is a method for preparing the SrMnO3 ceramic powder by virtue of a sol-gel method.

Description

technical field [0001] The invention relates to the field of single-phase magnetoelectric ceramic materials. Background technique [0002] Manganites refer to manganates containing rare earth ions and other ions. They are a typical strongly correlated electronic system with strong coupling between their internal spins, charges, orbits and lattices. Effect, and then produced a variety of competing phases and special physical properties, and manganese oxides are also an important class of single-phase multiferroic materials. Realize the multiferroic properties of manganese oxides and transform them into single-phase magnetoelectric coupling multifunctional materials at room temperature, which will make manganese oxides have important applications in memory, high capacitance and large inductance electronic components, and spintronic components value. [0003] SrMnO 3 It is a very rare perovskite-type manganese oxide with cubic (high temperature) and hexagonal (low temperatur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/01C04B35/624
Inventor 柯华王猛张洪军张利伟应鹏展谢星驰罗蕙佳代
Owner HARBIN INST OF TECH
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