Ternary material, preparation method and application thereof

A ternary material and ternary composite technology, which is applied in device material selection, information storage, instruments, etc., can solve the problems of limited improvement in magnetism and electricity, and achieve reduced coercive field, strong stability, and good research value and practical value effects

Active Publication Date: 2016-07-13
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, so far, there are very few reports on the ternary system related to bismuth ferrite-lead titanate, and the modification of these ions has limited improvement in magnetism and electricity. It is necessary to modify the bismuth-lead titanate binary system to improve its electrical and magnetic properties

Method used

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  • Ternary material, preparation method and application thereof
  • Ternary material, preparation method and application thereof
  • Ternary material, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Example 1 Sample P1 # ~P9 # and F1 # ~F9 # preparation of

[0044] Sample P1 # ~P9 # The preparation process is as follows

[0045] a) PbO, Bi 2 o 3 , Fe 2 o 3 、Nd 2 o 3 and TiO 2 Add alcohol and mix and grind for two hours to obtain a mixture I with the following molar ratio: Pb: Bi: Fe: Nd: Ti=z: x: (x+y): y: z, z=1-x-y;

[0046] b) after the mixture I obtained in step a) is compressed and calcined, a precursor is obtained;

[0047] c) adding alcohol to the precursor obtained in step b), mixing and grinding for two hours, adding 5% PVA binder and mixing evenly to obtain mixture II;

[0048] d) After the mixture II obtained in step c) is compressed into tablets at 12 MPa, debinding at 400°C to 600°C;

[0049] e) Put the debinding sample obtained in step d) at 1000°C to 1100°C for 4 hours and bake for 4 hours to obtain ceramic sample sheets of the ternary material, which are respectively designated as sample P1 # ~P9 # .

[0050] Table 1 shows the relati...

Embodiment 2

[0055] The structural characterization of embodiment 2 sample

[0056] Sample F1 was analyzed by X-ray powder diffraction (XRD) method. # ~F9 # characterize the structure. The instrument used is Japan RIGAKU-DMAX2500 powder diffractometer (Cu target, λ=0.154056nm, graphite monochromator), the specific test conditions are at room temperature, the measurement angle range is 10-80°, and the step size used is 0.02° (2θ ), the time is 2s per step.

[0057] Sample F1 # ~F6 # The XRD pattern such as figure 1 shown. As can be seen from the figure, sample F1 # ~F6 # There are characteristic diffraction peaks of perovskite structure on the XRD pattern of the sample F1 # ~F6 # All are high-purity samples with a perovskite structure. Sample F7 # ~F9 # XRD pattern of sample F1 # The chromatograms are similar, that is, the peak positions are basically the same, and the peak intensity varies in the range of ±10% according to different synthesis conditions.

Embodiment 3

[0058] The electrical property measurement of embodiment 3 samples

[0059] The ceramic sample piece P1 # ~P9 # The grinding thickness is 0.4~0.6mm, and silver glue is coated on both sides after polishing, which is used for the determination of electrical properties.

[0060] The measurement of the dielectric properties of the samples was carried out on an Alpha dielectric / impedance high-resolution analyzer (Novolcontrol, German), with a temperature range of 30-500°C, a frequency range of 1-10kHz, and a small-signal test voltage of 1Vrms.

[0061] The measurement of the ferroelectricity of the sample was carried out in the TF2000 standard ferroelectric measurement system produced by aixACCT Company in Germany, the temperature condition was room temperature, and the applied frequency was 10 Hz.

[0062] The result is as figure 2 and image 3 as shown, figure 2 is sample P1 # The dielectric temperature spectrum; image 3 is sample P1 # ~P6 # hysteresis loop. It can b...

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Abstract

The invention discloses a ternary material. The ternary material is characterized in that it has a perovskite type structure and contains a three-element composite system of BiFeO3, PbTiO3 and NdFeO3. The ternary material has strong stability, also has piezoelectricity, ferroelectricity and paramagnetism, and can be applied to piezoelectric sensors, memory, and high performance capacitors and other related fields.

Description

technical field [0001] The application relates to a ternary material, its preparation method and application, and belongs to the field of functional materials. Background technique [0002] As early as 1894, P. Curie used the theory of symmetry to predict the existence of magnetoelectric effect in nature. In 1960, scientists discovered single crystal Cr 2 o 3 There is a magnetoelectric effect in the temperature range from 80K to 330K, which has triggered an upsurge in searching for the magnetoelectric effect, and has successively found poles in mixed perovskite magnetic ferroelectric materials, antiferromagnetic materials and ferrimagnetic materials. Weak magnetoelectric effect. In 1970, Aizu put forward the concept of ferroic materials (Ferroics) based on a series of similarities between the three properties of ferroelectricity, ferromagnetism and ferroelasticity. In 1994, Schmid in Switzerland clearly proposed the concept of multi-ferroic materials (Multi-Ferroic), whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/40C04B35/472C04B35/622C04B35/64H01L41/16H01G7/02G11C11/22
CPCG11C11/22H01G7/02C04B35/2675C04B35/472C04B35/622C04B35/64C04B2235/661C04B2235/3232C04B2235/3298C04B2235/3296H10N30/85
Inventor 龙西法庞东方何超
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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