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Multiferroic sosoloid ceramic and preparation method thereof

A solid solution, multiferroic technology, applied in the field of multiferroic solid solution ceramics and its preparation, can solve the problems of large ceramic loss and low magnetoelectric coupling effect, and achieves reduction of loss, improvement of magnetic and magnetoelectric coupling effect, low loss Effect

Active Publication Date: 2019-03-26
JIANGXI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned situation, the present invention provides a kind of multiferroic solid solution ceramics and preparation method, to solve BiFeO 3 The problem of large loss of base multiferroic solid solution ceramics and low magnetoelectric coupling effect

Method used

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  • Multiferroic sosoloid ceramic and preparation method thereof
  • Multiferroic sosoloid ceramic and preparation method thereof
  • Multiferroic sosoloid ceramic and preparation method thereof

Examples

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Embodiment 1

[0026] A multiferroic solid solution ceramic, the chemical composition of the multiferroic solid solution ceramic is expressed as (1-x-y)BiFeO 3 -xLaFeO 3 -yPbFeO 2.5 , where x is LaFeO 3 Mole percent of , y is PbFeO 2.5 The mole percentage of x=0.10, y=0.30, the preparation method of this multiferroic solid solution ceramics is as follows:

[0027] Step 1, prepare analytically pure powder raw material Bi 2 o 3 (purity ≥ 99.0%), Fe 2 o 3 (purity≥99.0%), La 2 o 3 (purity ≥ 99%), PbO (purity ≥ 99%), each powder raw material is dried at 500 ° C to remove moisture;

[0028] Step 2, according to the chemical formula BiFeO 3 Weigh the corresponding proportion of Bi 2 o 3 and Fe 2 o 3 , add a certain proportion of absolute ethanol for ball milling and mixing for 6 hours, take out the mixed slurry and bake in an oven at 90°C for 6 hours, pass through an 80-mesh sieve, and put the sieved mixed powder into an alumina crucible , pre-fired at 750°C for 2 hours in an air atm...

Embodiment 2

[0036] A multiferroic solid solution ceramic, the chemical composition of the multiferroic solid solution ceramic is expressed as (1-x-y)BiFeO 3 -xLaFeO 3 -yPbFeO 2.5 , where x is LaFeO 3 Mole percent of , y is PbFeO 2.5 The mole percentage of x=0, y=0.

[0037] Steps 1-2 in the preparation method of the multiferroic solid solution ceramics in this embodiment are basically the same as Steps 1-2 in Example 1, and the main difference from Example 1 lies in the subsequent steps, and the solid solution content is different at the same time, specifically x=0, y=0, due to LaFeO 3 and PbFeO 2.5 The content of is 0, therefore, does not need step 3 and step 4 among the embodiment 1, directly carries out step 5;

[0038] Step 5, weigh the above BiFeO 3 For powder, add a certain amount of deionized water for ball milling and mixing for 6 hours, take out the mixed slurry and bake it in an oven at 120°C for 12 hours, pass through a 80-mesh sieve, and add a concentration of 5wt% pol...

Embodiment 3

[0040] A multiferroic solid solution ceramic, the chemical composition of the multiferroic solid solution ceramic is expressed as (1-x-y)BiFeO 3 -xLaFeO 3 -yPbFeO 2.5 , where x is LaFeO 3 Mole percent of , y is PbFeO 2.5 The molar percentage of x=0.1, y=0.

[0041] Steps 1-3 in the preparation method of multiferroic solid solution ceramics in this embodiment are basically the same as steps 1-3 in Example 1, the main difference from Example 1 lies in the subsequent steps, and at the same time, the solid solution content is different, specifically x=0.1, y=0, due to PbFeO 2.5 The content of is 0, therefore, does not need step 4 among the embodiment 1, directly carries out step 5;

[0042] Step 5, by stoichiometric ratio 0.90BiFeO 3 -0.10LaFeO 3 Weigh the above BiFeO 3 、LaFeO 3 For powder, add a certain proportion of deionized water for ball milling and mixing for 6 hours, take out the mixed slurry and bake it in an oven at 120°C for 12 hours, pass through a 80-mesh siev...

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Abstract

The invention provides multiferroic sosoloid ceramic and a preparation method thereof. The chemical constitution of the multiferroic sosoloid ceramic is shown as (1-x-y)BiFeO3-xLaFeO3-yPbFeO2.5, wherein x is the mole percent of LaFeO3; y is the mole percent of PbFeO2.5; x is greater than or equal to 0 but is smaller than or equal to 0.10; y is greater than or equal to 0 but is smaller than or equal to 0.35. The ternary solid solution systems are used and are respectively BiFeO3, LaFeO3 and PbFeO2.5 which respectively have different effects; the BFO has an intrinsic magnetoelectric coupling effect; the LFO can reduce the BFO loss; through the stable BFO structure, PbFeO2.5 can easily realize solid solution and can further reduce the loss; meanwhile, the magnetic and magnetoelectric couplingeffect is improved. BiFeO3 powder, LaFeO3 power and PbFeO2.5 power are respectively prepared, and are then pelleted and sintered together. The preparation method has the advantages that the final sosoloid sintering formation temperature can be effectively reduced; further, the volatilization of Bi and Pb elements at high temperature is reduced.

Description

technical field [0001] The invention relates to the technical field of information storage materials, in particular to a multiferroic solid solution ceramic and a preparation method thereof. Background technique [0002] A multiferroic material is a material in which electricity, magnetism, and structural order are coupled with each other. It has two or three "ferroic" properties: ferroelectricity, ferromagnetism, and ferroelasticity. The new non-volatile memory made of multiferroic materials has higher storage density, lower power consumption and faster response than traditional memories, and is a strong competitor for the next generation of memories. Among them, BiFeO 3 (BFO) is the only one with high Curie temperature (T c ~1103K) and high Neil temperature (T N ~643K) single-phase multiferroic material. BFO single-phase multiferroic materials have rich physical phenomena and many potential applications, and can be used in functional devices such as sensors, multi-stat...

Claims

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Application Information

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IPC IPC(8): C04B35/26C04B35/622
CPCC04B35/2641C04B35/622C04B2235/3227C04B2235/3296C04B2235/3298C04B2235/6562C04B2235/6567C04B2235/76C04B2235/766C04B2235/77C04B2235/786
Inventor 薛飞田娅晖
Owner JIANGXI UNIV OF TECH
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