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A kind of iron-based perovskite magnetic material containing b-site vacancies and preparation method thereof

A magnetic material, perovskite technology, applied in the direction of inorganic material magnetism, inductance/transformer/magnet manufacturing, circuits, etc.

Active Publication Date: 2022-04-01
LIUPANSHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the regulation of magnetic properties of perovskite structure compounds is mainly achieved by doping A-site and B-site elements, and A-site vacancies. There are few reports and studies on B-site vacancy doping.

Method used

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  • A kind of iron-based perovskite magnetic material containing b-site vacancies and preparation method thereof
  • A kind of iron-based perovskite magnetic material containing b-site vacancies and preparation method thereof
  • A kind of iron-based perovskite magnetic material containing b-site vacancies and preparation method thereof

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Experimental program
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Effect test

Embodiment 1～5

[0045] (1). Calculation: set the sample La 0.67 Sr 0.33 Fe 1-x o 3 is 0.06mol, use Moore's law to find the required La 2 o 3 , Fe 2 o 3 and SrCO 3 quality, as shown in Table 1.

[0046] Table 1 Fe-based perovskite magnetic material La 0.67 Sr 0.33 Fe 1-x o 3 formula

[0047]

[0048] (2). Ingredients: For the reagent in step (1), since the raw material needed in the experiment is the oxide La with higher purity 2 o 3 (99.99%), so all required reagents need to be heat-treated at 873K~1073K before weighing, to remove adsorbed water and carbon dioxide, and set aside.

[0049] (3). Weighing: Use an analytical balance with an accuracy of 0.0001g to weigh according to the relevant mass in Table 1 in (1), and put it into a polyethylene ball mill jar for later use.

[0050] (4). Grinding: Put the large balls (1cm in diameter) and small balls (0.5cm in diameter) prepared by zirconia in a ratio of 1:1, the total number is 50, carefully put them into the Ball mill jar,...

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Abstract

The invention provides an iron-based perovskite magnetic material containing B-site vacancies, the chemical composition of which is shown in formula (I): La 0.67 Sr 0.33 Fe 1‑x o 3 (I); Wherein, 0<x≤0.05. The present invention also provides a preparation method of the iron-based perovskite magnetic material described in the above technical solution. The present invention introduces the traditional La through B-site vacancies 0.67 Sr 0.33 FeO 3 Perovskite matrix, a new type of ferrimagnetic La 0.67 Sr 0.33 Fe 1‑x o 3 Rhombohedral polycrystalline perovskite materials, compared with various existing traditional perovskite materials, because the B-site vacancies are located in the same oxygen octahedron center position as Fe ions, the Fe ions that generate magnetism 3+ with Fe 4+ The electrons outside the core of the ion have a pinning effect, making its Curie temperature higher than all known perovskite materials, which has potential application prospects in the field of high-temperature magnetoelectronic materials.

Description

technical field [0001] The invention belongs to the technical field of perovskite materials, in particular to an iron-based perovskite magnetic material containing B-site vacancies and a preparation method thereof. Background technique [0002] ABOs 3 (The A site is generally a rare earth or alkaline earth element ion, while the B site is a transition element ion)-type perovskite structure type functional materials have been found to have properties such as gas sensitivity, giant magnetoresistance, electrical conductivity and catalytic activity. It is applied to many fields such as solid fuel cells, solid electrolytes, sensors, high-temperature heating materials, catalysts, and membrane reactors. In particular, the development and research of its ferroelectric properties has become a research hotspot. At present, the regulation of magnetic properties of perovskite structure compounds is mainly achieved by doping A-site and B-site elements, and A-site vacancies. There are f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/40C04B35/622H01F1/34H01F41/02
Inventor 纪登辉张聪敏刘振文曾志伟
Owner LIUPANSHUI NORMAL UNIV