Method for preparing ferrite bismuth lanthanum-titanate lead solid solution ceramic under strong magnetic field action

A technology of bismuth lanthanum ferrite and solid solution is applied in the field of preparing bismuth lanthanum ferrite-lead titanate solid solution ceramics, which can solve the problem that the strong magnetic field has not been applied, and achieves high crystalline properties, improved ferromagnetic and magnetoelectric coupling energy. Effect

Inactive Publication Date: 2009-07-08
SHANGHAI UNIV
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Problems solved by technology

At present, in terms of material preparation, strong magnetic fields are mainly used in the solidification of metals, recrystallization of iron and steel materials, and solid-state phase transitions, while strong magnetic fields have not been used in the preparation of inorganic electronic functional materials.

Method used

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  • Method for preparing ferrite bismuth lanthanum-titanate lead solid solution ceramic under strong magnetic field action
  • Method for preparing ferrite bismuth lanthanum-titanate lead solid solution ceramic under strong magnetic field action
  • Method for preparing ferrite bismuth lanthanum-titanate lead solid solution ceramic under strong magnetic field action

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Embodiment 1

[0026] Preparation of 0.57(Bi 0.9 La 0.1 )FeO 3 -0.43PbTiO 3 Solid solution ceramics, the preparation steps of this embodiment are as follows:

[0027] (1) weighing and batching according to the stoichiometric ratio of the above chemical formula; using Bi with a purity greater than 99.9% 2 o 3 , La 2 o 3 , Fe 2 o 3 , PbCO 3 and TiO 2 Powder; the mass of each oxide is:

[0028] Bi 2 o 3 19.6198g;

[0029] La 2 o 3 1.5275g;

[0030] Fe 2 o 3 7.4743g;

[0031] PbCO2 3 18.8594g;

[0032] TiO 2 5.6393g;.

[0033] Add absolute ethanol as the ball milling agent, and use zirconia balls as the ball milling medium; the weight ratio of the three is powder: zirconia balls: ethanol = 1:1.5:1; put it in the ball mill for 24 hours to make the oxide fully Blend and grind finely.

[0034] (2) After drying the above mixture at 80°C, raise the temperature to 450°C at a rate of 5°C / min, keep it warm for 2 hours, then...

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Abstract

The invention relates to a method for preparing bismuth lanthanum ferrite-lead titanate solid solution ceramics under the action of a strong magnetic field, belonging to the technical field of inorganic non-metallic materials and solid solution ceramic materials. The chemical formula of the bismuth lanthanum ferrite-lead titanate solid solution ceramic designed and determined by the present invention is: (1-x)(Bi1-yLay)FeO3-xPbTiO3; wherein: 0.2≤x≤0.6, y=0~0.4. Weigh and batch according to the stoichiometric ratio of the above chemical formula; use Bi2O3, La2O3, Fe2O3, PbCO3 and TiO2 powders with a purity greater than 99.9%, mix after weighing, add ethanol as the grinding agent, and zirconia balls as the grinding medium. Ball milling for 24 hours, fully mixed and finely ground; then synthesized by calcination at 750°C, this process is carried out under a strong magnetic field, the magnetic field strength is 7-14T; ball milling for 24 hours; then second calcination and ball milling again; and then made Granules and tablets; finally, the green compact is sintered at 1080-1100°C, and a strong magnetic field is also introduced at the same time to obtain ferroelectric and ferromagnetic ceramic materials.

Description

technical field [0001] The invention relates to a method for preparing bismuth lanthanum ferrite-lead titanate solid solution ceramics under the action of a strong magnetic field, belonging to the technical field of inorganic non-metallic materials and solid solution ceramic materials. Background technique [0002] Multiferroic materials integrate the properties of ferroelectricity, ferromagnetism and ferroelasticity, and have unique coupling effects between multiple fields (force, electricity, magnetism, heat and light), showing many important coupling properties, such as magnetoelectricity , piezoelectric, pyroelectric and piezoelectric effects, etc., are important advanced functional materials. The coupling performance of these materials provides a great degree of freedom for device design, so that they can be developed into various sensors, transducers, drivers and information storage, and are used in aerospace, automobile industry, biology, medicine, information and oth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/622C04B35/63C04B35/64C04B35/472C04B35/40
Inventor 程晋荣陈建国俞圣雯孟中岩
Owner SHANGHAI UNIV
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