Low-sintering anti-ferroelectric ceramic material for high-energy-storage-density capacitors and preparation method thereof

A technology with high energy storage density and ceramic materials, which is applied in the field of functional ceramics, can solve the problems that cannot satisfy the preparation process of multilayer ceramic capacitors, and achieve excellent charge and discharge characteristics, lower sintering temperature, and simple preparation process.

Inactive Publication Date: 2020-11-27
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, according to the current literature reports, lead-based antiferroelectric ceramics generally have a relatively high sintering temperature (about 1300 ° C), such as the Chinese invention patent No. CN202010065883. Electroceramic material and preparation method thereof " (authorization announcement number is CN111233470A), therefore still can't meet the preparation technology of multilayer ceramic capacitor (MLCC)

Method used

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  • Low-sintering anti-ferroelectric ceramic material for high-energy-storage-density capacitors and preparation method thereof
  • Low-sintering anti-ferroelectric ceramic material for high-energy-storage-density capacitors and preparation method thereof
  • Low-sintering anti-ferroelectric ceramic material for high-energy-storage-density capacitors and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The chemical composition of antiferroelectric ceramics in the present embodiment is (Pb 0.91 Ba 0.015 La 0.05 )(Zr 0.6 sn 0.4 )O 3 +0.2wt%BaO-B 2 o 3 -Al 2 o 3 -SiO 2 , including the following steps:

[0039] (1) Select Pb with a purity greater than 99% 3 o 4 、BaCO 3 , La 2 o 3 , ZrO 2 , SnO 2 As a raw material for antiferroelectric ceramic phase;

[0040] (2) weigh according to the stoichiometric ratio, add ball milling medium and carry out ball milling, discharging, drying;

[0041] (3) Calcining the dried powder in a muffle furnace at 800-900°C for 2-3 hours;

[0042] (4) Add 0.2wt% barium-boron-aluminosilicate glass powder to the calcined powder, perform secondary ball milling, discharge, dry, granulate, sieve, and press under a pressure of 4 to 8 MPa into ceramic discs;

[0043] (5) debinding the obtained ceramic body in a muffle furnace;

[0044](6) The ceramic body after debinding is sintered at 1050-1200°C, the heating rate is controlled at ...

Embodiment 2

[0047] The chemical composition of antiferroelectric ceramics in the present embodiment is (Pb 0.91 Ba 0.015 La 0.05 )(Zr 0.6 sn 0.4 )O 3 +0.4wt% BaO-B 2 o 3 -Al 2 o 3 -SiO 2 , including the following steps:

[0048] (1) Select Pb with a purity greater than 99% 3 o 4 、BaCO 3 、La 2 o 3 , ZrO 2 , SnO 2 As a raw material for antiferroelectric ceramic phase;

[0049] (2) weigh according to the stoichiometric ratio, add ball milling medium and carry out ball milling, discharging, drying;

[0050] (3) Calcining the dried powder in a muffle furnace at 800-900°C for 2-3 hours;

[0051] (4) Add 0.4% barium borosilicate glass powder by mass to the calcined powder, perform secondary ball milling, discharge, dry, granulate, sieve, and press under a pressure of 4 to 8 MPa to form Ceramic disc;

[0052] (5) debinding the obtained ceramic body in a muffle furnace;

[0053] (6) The ceramic body after debinding is sintered at 1050-1200°C, the heating rate is controlled at ...

Embodiment 3

[0057] The chemical composition of antiferroelectric ceramics in the present embodiment is (Pb 0.91 Ba 0.015 La 0.05 )(Zr 0.6 sn 0.4 )O 3 +0.6wt% BaO-B 2 o 3 -Al 2 o 3 -SiO 2 , including the following steps:

[0058] (1) Select Pb with a purity greater than 99% 3 o 4 、BaCO 3 、La 2 o 3 , ZrO 2 , SnO 2 As a raw material for antiferroelectric ceramic phase;

[0059] (2) weigh according to the stoichiometric ratio, add ball milling medium and carry out ball milling, discharging, drying;

[0060] (3) Calcining the dried powder in a muffle furnace at 800-900°C for 2-3 hours;

[0061] (4) Add barium borosilicate glass powder of 0.2% by mass to the calcined powder, carry out secondary ball milling, discharge, dry, granulate, sieve, and press under a pressure of 4 to 8 MPa to form Ceramic disc;

[0062] (5) debinding the obtained ceramic body in a muffle furnace;

[0063] (6) The ceramic body after debinding is sintered at 1050-1200°C, the heating rate is controlle...

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Abstract

The invention relates to a low-sintering anti-ferroelectric ceramic material for high-energy-storage-density capacitors and a preparation method thereof. The anti-ferroelectric ceramic material comprises a lead-barium-lanthanum-zirconium-tin anti-ferroelectric ceramic phase and a barium-boron-aluminum-silicon glass phase. The general chemical formula of the anti-ferroelectric ceramic material is (Pb<0.91>Ba<0.015>La<0.05>) (Zr<0.6>Sn<0.4>)O<3+x wt%> (y)BaO-(z)B2O3-(1-y-z-w)SiO2, wherein x is greater than 0 and less than or equal to 1.0, y is greater than 0 and less than 1, z is greater than 0and less than 1,and w is greater than 0 and less than 1. In the preparation process, the anti-ferroelectric ceramic material is prepared by a solid-phase sintering method, and a glass sintering aid isintroduced, so that the compressive strength of the anti-ferroelectric ceramic material is remarkably improved, and the sintering temperature of the ceramic is greatly reduced. Compared with the prior art, the material has the characteristics of high energy storage density, high energy storage efficiency, excellent charging and discharging performance and low sintering temperature, is simple in preparation process, and has very important significance for developing pulse power devices such as multilayer ceramic capacitors.

Description

technical field [0001] The invention relates to the field of functional ceramics, in particular to a low-fired antiferroelectric ceramic material for capacitors with high energy storage density and a preparation method thereof. Background technique [0002] With the advancement of science and technology, people's demand for convenience, simplicity and speed of electronic products is increasing day by day, prompting the development of corresponding electronic circuits towards integration, miniaturization and simplicity. Energy storage capacitors are widely used in modern electronic energy systems, such as pulse power systems, hybrid vehicles, new energy power systems, microelectronic equipment and other fields. The development of miniaturized and lightweight capacitors has become the long-term development direction of the industry. [0003] Ceramic dielectric materials have the advantages of high mechanical strength, slow aging rate, adjustable dielectric and good temperature...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/457C04B35/622C04B41/88
CPCC04B35/457C04B35/64C04B41/009C04B41/5116C04B41/88C04B2235/3215C04B2235/3217C04B2235/3227C04B2235/3248C04B2235/3296C04B2235/3409C04B2235/3418C04B2235/6562C04B2235/6567C04B2235/785
Inventor 翟继卫黄凯威葛广龙沈波
Owner TONGJI UNIV
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