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High-dispersion antiferroelectric submicron ceramic powder and preparation method thereof

A ceramic powder and antiferroelectric technology, which is applied in the field of highly dispersed antiferroelectric submicron ceramic powder and its preparation, can solve problems such as hard agglomeration, inability to fully utilize the advantages of high energy storage, and deterioration of ceramic electrical resistance. Achieve the effects of high electric strength, compact microstructure, and high energy storage characteristics

Pending Publication Date: 2020-04-24
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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Problems solved by technology

For antiferroelectric formulations with high energy storage density, during the preparation of submicron powders by solid phase synthesis-wet grinding method, it was found that the powders were severely agglomerated after drying, which resulted in the agglomerated particles surrounding the ceramics sintered with the powders A lot of cracks are generated, which deteriorates the electrical resistance of ceramics and cannot give full play to the advantages of high energy storage

Method used

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  • High-dispersion antiferroelectric submicron ceramic powder and preparation method thereof
  • High-dispersion antiferroelectric submicron ceramic powder and preparation method thereof
  • High-dispersion antiferroelectric submicron ceramic powder and preparation method thereof

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preparation example Construction

[0024] The preparation method of the present invention can be realized by the following technical solutions:

[0025] First, ceramic powders were prepared by solid-phase synthesis. The chemical composition of the above-mentioned highly dispersed antiferroelectric ceramic powder conforms to the general chemical formula: Pb 1-1.5x La x Zr 1-y-z Ti y sn z o 3 , 0.0≤x≤0.15, 0≤y≤0.10, 0.0≤z≤0.60. Preferably, 0.04≤x≤0.14, 0≤y≤0.08, 0≤z≤0.60. The above ceramic powder can be Pb 3 o 4 , La 2 o 3 , ZrO 2 、TiO 2 , SnO 2 and other oxides as raw materials.

[0026] This solid-phase synthesis may comprise the following steps: (1) Pb with a purity higher than 99% 3 o 4 , La 2 o 3 , ZrO 2 、TiO 2 , SnO 2 as raw material, and according to Pb 1-1.5x La x Zr 1-y-z Ti y sn z o 3 stoichiometric ratio weighing. Preferably, Pb 3 o 4 An excess of 0-5% can supplement the lattice defects caused by the volatilization of Pb element during synthesis and sintering. (2) Using w...

Embodiment 1

[0042] The chemical composition of the antiferroelectric ceramic material: Pb 1-1.5x La x Zr 1-y-z Ti y sn z o 3 , x=0.06, y=0.0, z=0.55, using traditional solid-phase synthesis-two-step wet grinding to prepare antiferroelectric powder and ceramics includes the following steps:

[0043] (1) Pb with a purity higher than 99% 3 o 4 , La 2 o 3 , ZrO 2 、TiO 2 , SnO 2 as the raw material; according to the stoichiometric ratio of the above chemical formula, the materials were weighed, the materials were mixed by wet roller milling, and the zirconia balls were used as the ball milling medium, and mixed according to the weight ratio of material: ball milling medium: ethanol = 1:5:0.8 for 24 hours, at 70 Dry at ℃;

[0044] (2) Calcining the dried powder at 1000°C for 2 hours;

[0045] (3) Take 100-130g of the calcined powder, add 2% sintering aid according to the weight percentage, take 1.0-1.3kg with 2mm zirconia balls as grinding balls, and use agitating mill for fine gri...

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Abstract

The invention discloses high-dispersion antiferroelectric submicron ceramic powder and a preparation method thereof. The preparation method of the high-dispersion antiferroelectric submicron ceramic powder comprises the steps: firstly, carrying out primary grinding by adopting a high-energy grinding method to obtain primary-ground submicron-granularity antiferroelectric ceramic powder; and carrying out secondary grinding on the primarily ground submicron antiferroelectric ceramic powder to obtain the high-dispersion antiferroelectric submicron ceramic powder.

Description

technical field [0001] The invention belongs to the technical field of functional ceramic materials, and in particular relates to a highly dispersed antiferroelectric submicron ceramic powder and a preparation method thereof. Background technique [0002] Pulse power technology refers to the electrophysical technology that slowly inputs low-power energy into energy storage equipment for a long time, and then releases it to the load with extremely high power in a very short period of time. It has been widely used in high-tech, civil and other fields. Applications. Energy storage capacitor energy storage element has the advantages of fast energy release, large output power, flexible combination, mature technology, and low price, and has become the most widely used energy storage element at present. However, due to the low energy storage density of the existing organic film capacitors, the energy storage capacitors in the equipment account for 80% of the total volume of the eq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/626C04B35/01
CPCC04B35/01C04B35/6261C04B35/62675C04B2235/3227C04B2235/3244C04B2235/3293C04B2235/3296C04B2235/5436C04B2235/5445
Inventor 闫世光曹菲陈学锋王根水董显林
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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