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Preparation method of TbMn(1-x)FexO3 powder

A powder and solid technology, applied in chemical instruments and methods, inorganic chemistry, iron compounds, etc., can solve the problems of complex preparation process, affect material properties, and high cost of raw materials, achieve simple preparation process, shorten reaction time, and scope of application wide effect

Inactive Publication Date: 2019-02-22
XIAN TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The solid-phase method is currently the main method for preparing rare earth-doped manganese oxide magnetic materials. The reaction mechanism of the solid-state reaction is a thermodynamic diffusion process. It can only be carried out under conditions, and requires multiple grindings and repeated high-temperature treatments. Therefore, the preparation process is complicated and the cost is high. At the same time, the growth and agglomeration of the product particles are difficult to control, the particles are uneven, the particle size distribution range is wide, and the crystal form is irregular. Seriously affect the performance of the material
[0011] The sol-gel method is improved compared with the solid-phase method, but its main problem is that a large amount of organic complexing agents, usually organic acids (alcohols), are used in the reaction process. These raw materials are expensive and have a great impact on the environment. ; In addition, the entire reaction process takes a long time, usually several weeks; finally, micropores appear in the crystal due to the volatilization of the organic solvent during the drying process

Method used

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  • Preparation method of TbMn(1-x)FexO3 powder
  • Preparation method of TbMn(1-x)FexO3 powder
  • Preparation method of TbMn(1-x)FexO3 powder

Examples

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Effect test

Embodiment 1

[0046] Utilize the method of the present invention to prepare TbMn 1-x Fe x o 3 , where x=0.1, including the following steps in turn:

[0047] First, prepare the standard solution Tb(NO 3 ) 3 , MnCl 2 and FeCl 3 The concentrations are 0.4M, 0.2M, 0.2M; then, measure 10mL Tb(NO 3 ) 3 (0.4M), 18mL MnCl 2 (0.2M) and 2mL FeCl 3 (0.2M) Standard solution was magnetically stirred in a 50mL beaker, and 35g of solid KOH was slowly added while stirring, and the stirring should be rapid until the final mixture was cooled to room temperature; then, the mixture was moved into a reaction kettle with a filling degree of 75%, ℃ for 3 days, the product was washed 5 times with deionized water and 3 times with absolute ethanol, and finally dried at 70 ℃ to obtain TbMn 0.9 Fe 0.1 o 3 .

Embodiment 2

[0049] Utilize the method of the present invention to prepare TbMn 1-x Fe x o 3 , where x=0.3, including the following steps in turn:

[0050] First, prepare the standard solution Tb(NO 3 ) 3 , MnCl 2 and FeCl 3 The concentrations are 0.4M, 0.2M, 0.2M; then, measure 10mL Tb(NO 3 ) 3 (0.4M), 14mL MnCl 2 (0.2M) and 6mL FeCl 3 (0.2M) Standard solution was magnetically stirred in a 50mL beaker, and 25g of solid KOH was slowly added while stirring, and the stirring should be rapid until the mixture was finally cooled to room temperature; then, the mixture was moved into a reaction kettle with a filling degree of 75%, ℃ under hydrothermal reaction for 3 days, the obtained product was washed 5 times with deionized water and 3 times with absolute ethanol, and finally dried at 70 ℃ to obtain TbMn 0.7 Fe 0.3 o 3 .

Embodiment 3

[0052] Utilize the method of the present invention to prepare TbMn 1-x Fe x o 3 , where x=0.5, including the following steps in turn:

[0053] First, prepare the standard solution Tb(NO 3 ) 3 , MnCl 2 and FeCl 3 The concentrations are 0.4M, 0.2M, 0.2M; then, measure 10mL Tb(NO 3 ) 3 (0.4M), 10mL MnCl 2 (0.2M) and 10mL FeCl 3 (0.2M) Standard solution was magnetically stirred in a 50mL beaker, and 30g of solid KOH was slowly added while stirring, and the stirring should be rapid until the final mixture was cooled to room temperature; then, the mixture was moved into a reaction kettle with a filling degree of 75%, ℃ under hydrothermal reaction for 3 days, the obtained product was washed 5 times with deionized water and 3 times with absolute ethanol, and finally dried at 70 ℃ to obtain TbMn 0.5 Fe 0.5 o 3 .

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Abstract

The invention discloses a preparation method of TbMn(1-x)FexO3 powder. According to the technical scheme, firstly, Tb(NO3)3, MnCl2 and FeCl3 standard solutions are prepared; then 10 mL of Tb(NO3)3 standard solution, 2-18 mL of MnCl2 standard solution and 2-18 mL of FeCl3 standard solution are taken with the sum of 30 mL and stirred, 25-35 g of solid KOH is slowly added during stirring, after solidKOH is fully dissolved and cooled to the room temperature, a mixed solution is transferred into a reaction kettle and subjected to a hydrothermal reaction, a product is alternately cleaned with deionized water and absolute ethyl alcohol and dried after the reaction, and the TbMn(1-x)FexO3 powder can be obtained. The preparation process is simple, the cost is low, defects of repeated grinding, high-temperature reaction and the like of a traditional solid phase method are overcome, and prepared TbMn(1-x)FexO3 has excellent ferroelectric and magnetoelectric characteristics.

Description

technical field [0001] The invention relates to the field of multiferroic materials for magnetoelectric sensors, in particular to a preparation method of TbMn1-xFexO3 powder. Background technique [0002] The performance of magnetoelectric sensors mainly depends on the polarization and ferroelectric response of multiferroic materials, Tb1-xHoxMnO3 as a multiferroic material has a huge ferroelectric effect and polarization phenomenon, they show simultaneous inversion of ferroelectric electrodes when scanning the magnetic field magnetization (P) and magnetization (M). The cross-coupling between M and P is of fundamental interest and provides an additional degree of freedom such that the non-collinear helical spin order is crucial for the occurrence of polarization when designing memory elements. [0003] Jin Jin-Ling et al. (Jin J L , Zhang X Q , Li G K , et al. Influence of the Jahn-Teller distortion on magnetic ordering in TbMn1-xFexO3[J]. Chinese Physics b: English Edition...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/00
CPCC01G49/0054C01P2002/34C01P2002/72C01P2006/80
Inventor 郑德山郭峰靳长清魏永星王喜锋
Owner XIAN TECH UNIV