Multiferroic titanium-iron-cobalt-nickel acid bismuth salt ceramic material having six-layer structure and preparation method thereof

A layered structure and performance technology, applied in the field of bismuth titanium iron cobalt oxide ceramic materials and their preparation, can solve problems such as unfavorable materials, and achieve the effects of easy availability, low sintering temperature and good ferroelectricity

Inactive Publication Date: 2012-06-27
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the study of single-phase materials, it was found that the magnetic phase transition temperature of the material is usually below room temperature, and the magnetism of the sample is antiferromagnetic, which is very unfavorable for the practical application of the material.

Method used

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  • Multiferroic titanium-iron-cobalt-nickel acid bismuth salt ceramic material having six-layer structure and preparation method thereof
  • Multiferroic titanium-iron-cobalt-nickel acid bismuth salt ceramic material having six-layer structure and preparation method thereof
  • Multiferroic titanium-iron-cobalt-nickel acid bismuth salt ceramic material having six-layer structure and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Preparation method of bismuth titanium iron cobalt nickel oxide ceramics with multiferroic performance six-layer structure:

[0020] (1) with Bi 2 o 3 , Fe 2 o 3 ,Co 2 o 3 , Ni 2 o 3 and TiO 2 As the raw material, the raw materials all adopt the products of Sinopharm Chemical Reagent Co., Ltd., in molar ratio, Bi 2 o 3 : Fe 2 o 3 :Co 2 o 3 : Ni 2 o 3 :TiO 2 =6~6.6:1:1:1:6;

[0021] (2) The raw materials in step (1) are ball-milled with absolute ethanol as the medium, and the ball-milling time is 23-25 ​​hours. After the ball-milling is mixed, they are dried, and the drying temperature is 110° C.;

[0022] (3) Put the dried raw materials in step (2) into an alumina crucible, lightly press it, place it in the air, and pre-synthesize at 730-780°C for 7.5-8.5h;

[0023] (4) The pre-synthesized material obtained in step (3) is ball-milled again with anhydrous ethanol as a medium, and the ball-milling time is 23-25 ​​hours, and the ball-milling is mixed and ...

Embodiment 2

[0027] 1. Preparation of sample raw materials:

[0028] Analytical pure bismuth oxide (Bi 2 o 3 ), analytically pure ferric oxide (Fe 2 o 3 ), analytically pure cobalt trioxide (Co 2 o 3 ), analytically pure nickel trioxide (Ni 2 o 3 ) and spectroscopically pure titanium oxide (TiO 2 ) as a raw material, the raw materials all adopt the products of Sinopharm Chemical Reagent Company, and the raw materials were baked at 110° C. in an oven for 8 hours before weighing.

[0029] Two, Bi 7 FeCoNiTi 3 o 21 Preparation of polycrystalline samples:

[0030] (1) Weighing of raw materials: weighing analytically pure bismuth oxide (Bi 2 o 3 ), analytically pure ferric oxide (Fe 2 o 3 ), analytically pure cobalt trioxide (Co 2 o 3 ) and BTO powder samples, the specific weights are shown in Table (1).

[0031] Table 1: Preparation of Bi 7 FeCoNiTi 3 o 21 raw material

[0032]

[0033] (2) Ball milling and pre-synthesis: the weighed analytically pure bismuth oxide (Bi ...

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Abstract

The invention discloses a multiferroic titanium-iron-cobalt-nickel acid bismuth salt ceramic material having a six-layer structure and a preparation method thereof. The multiferroic titanium-iron-cobalt-nickel acid bismuth salt ceramic material having a six-layer structure has a chemical formula of Bi7FeCoNiTi3O21. The preparation method comprises that raw materials of Bi2O3, Fe2O3, Co2O3, Ni2O3 and TiO2 are subjected to ball milling, drying, pre-synthesis, further ball milling, drying, molding, binder removal and sintering to form Bi7FeCoNiTi3O21, wherein a mole ratio of Bi2O3, Fe2O3, Co2O3, Ni2O3 to TiO2 is (6 to 6.6): 1: 1: 1: 6. The preparation method provided by the invention adopts a conventional solid phase sintering method, has simple processes and good environmental harmony. Bi7FeCoNiTi3O21 has ferroelectric and ferromagnetic properties at a room temperature, wherein Bi7FeCoNiTi3O21 has remanent polarization (2Pr) of 43 muC / cm<2> when a measure electric field is 390kV / cm and remanent magnetization of 0.95 emu / g.

Description

technical field [0001] The invention relates to a novel bismuth titanium iron cobaltate ceramic material with a six-layer perovskite structure and a preparation method thereof, belonging to the technical field of oxide ceramic materials. Background technique [0002] Magnetoelectric multiferroic materials refer to materials that exhibit ferroelectric order and ferromagnetic / antiferromagnetic order at the same time in a certain temperature range, and there is a certain coupling between them. Recently, this material has attracted more and more attention. On the one hand, it can not only be used in the research and development of ferroelectric and magnetic devices, but more importantly, it can use the coupling between magnetoelectricity to provide additional advantages for the design and application of devices. One degree of freedom, thus showing extremely attractive application prospects in emerging spintronics, multi-state information storage, electrically driven ferromagneti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/475C04B35/622
Inventor 陈小兵毛翔宇孙慧王伟陆亚林杨文露陈春燕
Owner YANGZHOU UNIV
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